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vuejs2.0 高级实战 全网稀缺 音乐WebAPP

日期： 2018-06-27    分类： 个人收藏 362次阅读

这里写图片描述

src简单的介绍

这里写图片描述

入口文件main.js

import 'babel-polyfill'  //写在第一位
import Vue from 'vue'
import App from './App'
import router from './router'
import fastclick from 'fastclick'
import VueLazyload from 'vue-lazyload'
import store from './store'

import 'common/stylus/index.styl'

/* eslint-disable no-unused-vars */
// import vConsole from 'vconsole'

fastclick.attach(document.body)

Vue.use(VueLazyload, {
  loading: require('common/image/default.png')  //传一个默认参数
})

/* eslint-disable no-new */
new Vue({
  el: '#app',
  router,
  store,
  render: h => h(App)
})

babel-polyfill是es6底层铺垫即支持一些API，比如promise,balbel-runtime为es6语法转义，fastclick解决移动端点击300毫秒的延迟

devDependencies 里面的插件(比如各种loader，babel全家桶及各种webpack的插件等)只用于开发环境，不用于生产环境，因此不需要打包；而 dependencies 是需要发布到生产环境的，是要打包的。

dependencies：应用能够正常运行所依赖的包。这种 dependencies 是最常见的，用户在使用 npm install 安装你的包时会自动安装这些依赖。
devDependencies：开发应用时所依赖的工具包。通常是一些开发、测试、打包工具，例如 webpack、ESLint、Mocha。应用正常运行并不依赖于这些包，用户在使用 npm install 安装你的包时也不会安装这些依赖。

{
  "name": "vue-music",
  "version": "1.0.0",
  "description": "音乐播放器",
  "author": "songhao",
  "private": true,
  "scripts": {
    "dev": "node build/dev-server.js",
    "start": "node build/dev-server.js",
    "build": "node build/build.js",
    "lint": "eslint --ext .js,.vue src"
  },
  "dependencies": {
    "babel-runtime": "^6.0.0",
    "vue": "^2.3.3",
    "vue-router": "^2.5.3",
    "vuex": "^2.3.1",
    "fastclick": "^1.0.6",
    "vue-lazyload": "1.0.3",
    "axios": "^0.16.1",
    "jsonp": "0.2.1",
    "better-scroll": "^0.1.15",
    "create-keyframe-animation": "^0.1.0",
    "js-base64": "^2.1.9",
    "lyric-parser": "^1.0.1",
    "good-storage": "^1.0.1"
  },
  "devDependencies": {
    "autoprefixer": "^6.7.2",
    "babel-core": "^6.22.1",
    "babel-eslint": "^7.1.1",
    "babel-loader": "^6.2.10",
    "babel-plugin-transform-runtime": "^6.22.0",
    "babel-preset-env": "^1.3.2",
    "babel-preset-stage-2": "^6.22.0",
    "babel-register": "^6.22.0",
    "babel-polyfill": "^6.2.0",
    "chalk": "^1.1.3",
    "connect-history-api-fallback": "^1.3.0",
    "copy-webpack-plugin": "^4.0.1",
    "css-loader": "^0.28.0",
    "eslint": "^3.19.0",
    "eslint-friendly-formatter": "^2.0.7",
    "eslint-loader": "^1.7.1",
    "eslint-plugin-html": "^2.0.0",
    "eslint-config-standard": "^6.2.1",
    "eslint-plugin-promise": "^3.4.0",
    "eslint-plugin-standard": "^2.0.1",
    "eventsource-polyfill": "^0.9.6",
    "express": "^4.14.1",
    "extract-text-webpack-plugin": "^2.0.0",
    "file-loader": "^0.11.1",
    "friendly-errors-webpack-plugin": "^1.1.3",
    "html-webpack-plugin": "^2.28.0",
    "http-proxy-middleware": "^0.17.3",
    "webpack-bundle-analyzer": "^2.2.1",
    "semver": "^5.3.0",
    "shelljs": "^0.7.6",
    "opn": "^4.0.2",
    "optimize-css-assets-webpack-plugin": "^1.3.0",
    "ora": "^1.2.0",
    "rimraf": "^2.6.0",
    "url-loader": "^0.5.8",
    "vue-loader": "^11.3.4",
    "vue-style-loader": "^2.0.5",
    "vue-template-compiler": "^2.3.3",
    "webpack": "^2.3.3",
    "webpack-dev-middleware": "^1.10.0",
    "webpack-hot-middleware": "^2.18.0",
    "webpack-merge": "^4.1.0",
    "stylus": "^0.54.5",
    "stylus-loader": "^2.1.1",
    "vconsole": "^2.5.2"
  },
  "engines": {
    "node": ">= 4.0.0",
    "npm": ">= 3.0.0"
  },
  "browserslist": [
    "> 1%",
    "last 2 versions",
    "not ie <= 8"
  ]
}

index.html

<!DOCTYPE html>
<html>
  <head>
    <meta charset="utf-8">
    <meta name="viewport"
          content="width=device-width, initial-scale=1.0, maximum-scale=1.0, minimum-scale=1.0, user-scalable=no">
    <title>vue-music</title>
  </head>
  <body>
    <div id="app"></div>
    <!-- built files will be auto injected -->
  </body>
</html>

APP.vue

<template>
  <div id="app" @touchmove.prevent>
    <m-header></m-header>
    <tab></tab>
    <keep-alive>
      <router-view></router-view>
    </keep-alive>
    //全局的播放器组件
    <player></player>
  </div>
</template>

<script type="text/ecmascript-6">
  import MHeader from 'components/m-header/m-header'
  import Player from 'components/player/player'
  import Tab from 'components/tab/tab'

  export default {
    components: {
      MHeader,
      Tab,
      Player
    }
  }
</script>

jsonp原理

它发送的不是一个ajax请求，是创建了一个script标签不受同源策略的影响，通过src指向服务器的地址，在地址后面加一个callback=a，服务器解析这个URL发现有一个callback=a的参数，返回数据的时候调用这个a方法，前端定义的a方法就能直接拿到数据

最后返回的时候从1开始截取，是因为上面的方法已经添加了&符号，所有返回&符之后的内容

jsonp的封装 这个js放置于静态文件夹下

import originJsonp from 'jsonp'   //jsonp 结合promise 封装

export default function jsonp(url, data, option) {
  url += (url.indexOf('?') < 0 ? '?' : '&') + param(data)

  return new Promise((resolve, reject) => {
    originJsonp(url, option, (err, data) => {
      if (!err) {
        resolve(data)
      } else {
        reject(err)
      }
    })
  })
}

export function param(data) {
  let url = ''
  for (var k in data) {
    let value = data[k] !== undefined ? data[k] : ''
    url += '&' + k + '=' + encodeURIComponent(value)
    //新型写法 es6写法
    //url += `&${k}=${encodeURIComponent(value)}`   es6语法
  }
  return url ? url.substring(1) : ''
}

推荐页面 recommend.js 使用jsonp 调取轮播图的数据

用到了es6对象的合并方法Object.assign，浅拷贝的方法

import jsonp from 'common/js/jsonp'
import {commonParams, options} from './config'

export function getRecommend() {
  const url = 'https://c.y.qq.com/musichall/fcgi-bin/fcg_yqqhomepagerecommend.fcg'

  const data = Object.assign({}, commonParams, {  //assign es6语法
    platform: 'h5',
    uin: 0,
    needNewCode: 1
  })

  return jsonp(url, data, options)
}

config.js 因为数据是爬的，所以定义了通用的参数对象，私有的参数通过assign方法添加

export const commonParams = {
  g_tk: 1928093487,
  inCharset: 'utf-8',
  outCharset: 'utf-8',
  notice: 0,
  format: 'jsonp'
}

export const options = {
  param: 'jsonpCallback'
}

export const ERR_OK = 0

components/recommend.vue 在组件中调用接口

export default {
    data() {
      return {
        recommends: []
      }
    },
    created() {
      this._getRecommend()
    },
    methods: {
      
      _getRecommend() {
        getRecommend().then((res) => {
          if (res.code === ERR_OK) {
            this.recommends = res.data.slider
          }
        })
      }
    },
    components: {
      Slider
    }
  }

<div v-if="recommends.length" class="slider-wrapper" ref="sliderWrapper">
          <slider>
            <div v-for="item in recommends">
              <a :href="item.linkUrl">
                <img class="needsclick" @load="loadImage" :src="item.picUrl">
                <!-- 如果fastclick监听到有class为needsclick就不会拦截 -->
              </a>
            </div>
          </slider>
        </div>

这里用到了slider组件以及slot的知识，也遇到了一个坑，因为数据响应 必须确定有数据v-if="recommends.length"才能保证插槽的正确显示

dom.js ，比较重要

操作dom的文件，位于通用静态文件

//是否有指定class存在
export function hasClass(el, className) {
  let reg = new RegExp('(^|\\s)' + className + '(\\s|$)')
  return reg.test(el.className)
}
//如果存在什么都不做，否则就设置添加
export function addClass(el, className) {
  if (hasClass(el, className)) {
    return
  }

  let newClass = el.className.split(' ')
  newClass.push(className)
  el.className = newClass.join(' ')
}

//展现了方法的设置技巧，一个getter、一个setter
export function getData(el, name, val) {
  const prefix = 'data-'
  if (val) {
    return el.setAttribute(prefix + name, val)
  }
  return el.getAttribute(prefix + name)
}
//下面的方法，在歌手详情页的自组件music-list用到，用于控制属性的兼容性
let elementStyle = document.createElement('div').style

let vendor = (() => {
  let transformNames = {
    webkit: 'webkitTransform',
    Moz: 'MozTransform',
    O: 'OTransform',
    ms: 'msTransform',
    standard: 'transform'
  }

  for (let key in transformNames) {
    if (elementStyle[transformNames[key]] !== undefined) {
      return key
    }
  }

  return false
})()

export function prefixStyle(style) {
  if (vendor === false) {
    return false
  }

  if (vendor === 'standard') {
    return style
  }
//数据的拼接，首字母大写加上剩余的部分
  return vendor + style.charAt(0).toUpperCase() + style.substr(1)
}

从下面开始开始编写项目

首先是推荐页面，由轮播图和热门歌单组成

轮播图的数据通过jsonp可以得到，但是热门歌单因为有referer、host的认证，所以需要在dev-server.js设置代理，（欺骗服务器）用到axios而不是jsonp

bulid目录下dev-server.js处理代理

require('./check-versions')()

var config = require('../config')
if (!process.env.NODE_ENV) {
  process.env.NODE_ENV = JSON.parse(config.dev.env.NODE_ENV)
}

var opn = require('opn')
var path = require('path')
var express = require('express')
var webpack = require('webpack')
var proxyMiddleware = require('http-proxy-middleware')
var webpackConfig = require('./webpack.dev.conf')
var axios = require('axios') //第一步

// default port where dev server listens for incoming traffic
var port = process.env.PORT || config.dev.port
// automatically open browser, if not set will be false
var autoOpenBrowser = !!config.dev.autoOpenBrowser
// Define HTTP proxies to your custom API backend
// https://github.com/chimurai/http-proxy-middleware
var proxyTable = config.dev.proxyTable

var app = express()

var apiRoutes = express.Router()   //以下是后端代理接口 第二步

apiRoutes.get('/getDiscList', function (req, res) {
  var url = 'https://c.y.qq.com/splcloud/fcgi-bin/fcg_get_diss_by_tag.fcg'
  axios.get(url, {
    headers: {
      referer: 'https://c.y.qq.com/',
      host: 'c.y.qq.com'
    },
    params: req.query
  }).then((response) => {
    res.json(response.data)  //输出到浏览器的res
  }).catch((e) => {
    console.log(e)
  })
})

apiRoutes.get('/lyric', function (req, res) {  //这是另一个接口下节将用到
  var url = 'https://c.y.qq.com/lyric/fcgi-bin/fcg_query_lyric_new.fcg'

  axios.get(url, {
    headers: {
      referer: 'https://c.y.qq.com/',
      host: 'c.y.qq.com'
    },
    params: req.query
  }).then((response) => {
    var ret = response.data
    if (typeof ret === 'string') {
      var reg = /^\w+\(({[^()]+})\)$/
      var matches = ret.match(reg)
      if (matches) {
        ret = JSON.parse(matches[1])
      }
    }
    res.json(ret)
  }).catch((e) => {
    console.log(e)
  })
})

app.use('/api', apiRoutes)   //最后一步

var compiler = webpack(webpackConfig)

var devMiddleware = require('webpack-dev-middleware')(compiler, {
  publicPath: webpackConfig.output.publicPath,
  quiet: true
})

var hotMiddleware = require('webpack-hot-middleware')(compiler, {
  log: () => {}
})
// force page reload when html-webpack-plugin template changes
compiler.plugin('compilation', function (compilation) {
  compilation.plugin('html-webpack-plugin-after-emit', function (data, cb) {
    hotMiddleware.publish({ action: 'reload' })
    cb()
  })
})

// proxy api requests
Object.keys(proxyTable).forEach(function (context) {
  var options = proxyTable[context]
  if (typeof options === 'string') {
    options = { target: options }
  }
  app.use(proxyMiddleware(options.filter || context, options))
})

// handle fallback for HTML5 history API
app.use(require('connect-history-api-fallback')())

// serve webpack bundle output
app.use(devMiddleware)

// enable hot-reload and state-preserving
// compilation error display
app.use(hotMiddleware)

// serve pure static assets
var staticPath = path.posix.join(config.dev.assetsPublicPath, config.dev.assetsSubDirectory)
app.use(staticPath, express.static('./static'))

var uri = 'http://localhost:' + port

var _resolve
var readyPromise = new Promise(resolve => {
  _resolve = resolve
})

console.log('> Starting dev server...')
devMiddleware.waitUntilValid(() => {
  console.log('> Listening at ' + uri + '\n')
  // when env is testing, don't need open it
  if (autoOpenBrowser && process.env.NODE_ENV !== 'testing') {
    opn(uri)
  }
  _resolve()
})

var server = app.listen(port)

module.exports = {
  ready: readyPromise,
  close: () => {
    server.close()
  }
}

recommend.js 使用axios 调取热门歌单的数据

export function getDiscList() {
  const url = '/api/getDiscList'

  const data = Object.assign({}, commonParams, {
    platform: 'yqq',
    hostUin: 0,
    sin: 0,
    ein: 29,
    sortId: 5,
    needNewCode: 0,
    categoryId: 10000000,
    rnd: Math.random(),
    format: 'json'
  })

  return axios.get(url, {
    params: data
  }).then((res) => {
    return Promise.resolve(res.data)
  })
}

slider轮播图组件用到了dom.js中的addclass方法，引入了better-scroll，注意一下window.addEventListener，初始化的时候这个方法this._setSliderWidth(true)传入true，来控制2倍的dom复制，特别注意初始化dots的方法

<template>
  <div class="slider" ref="slider">
    <div class="slider-group" ref="sliderGroup">
      <slot></slot>
    </div>
    <div class="dots">
      <span
        class="dot"
        :class="{active: currentPageIndex === index }"
        v-for="(item, index) in dots"
      ></span>
    </div>
  </div>
</template>

<script type="text/ecmascript-6">
import { addClass } from "common/js/dom";
import BScroll from "better-scroll";

export default {
  name: "slider",
  props: {
    loop: {
      type: Boolean,
      default: true
    },
    autoPlay: {
      type: Boolean,
      default: true
    },
    interval: {
      type: Number,
      default: 4000
    }
  },
  data() {
    return {
      dots: [],
      currentPageIndex: 0
    };
  },
  mounted() {
    setTimeout(() => {
      this._setSliderWidth();
      this._initDots();
      this._initSlider();

      if (this.autoPlay) {
        this._play();
      }
    }, 20);

    window.addEventListener("resize", () => {
      if (!this.slider) {
        return;
      }
      this._setSliderWidth(true);
      this.slider.refresh();
    });
  },
  //keep-active下的声明周期，相当于小程序的onshow
  activated() {
    if (this.autoPlay) {
      this._play();
    }
  },
  //组件销毁后清除定时器，有利于内存释放
  deactivated() {
    clearTimeout(this.timer);
  },
  beforeDestroy() {
    clearTimeout(this.timer);
  },
  methods: {
    //计算轮播的宽度
    _setSliderWidth(isResize) {
      this.children = this.$refs.sliderGroup.children;

      let width = 0;
      let sliderWidth = this.$refs.slider.clientWidth;
      for (let i = 0; i < this.children.length; i++) {
        let child = this.children[i];
        addClass(child, "slider-item");

        child.style.width = sliderWidth + "px";
        width += sliderWidth;
      }
      if (this.loop && !isResize) {
        width += 2 * sliderWidth;
      }
      this.$refs.sliderGroup.style.width = width + "px";
    },
    //初始化BScroll
    _initSlider() {
      this.slider = new BScroll(this.$refs.slider, {
        scrollX: true,
        scrollY: false,
        momentum: false,
        snap: true,
        snapLoop: this.loop,
        snapThreshold: 0.3,
        snapSpeed: 400
      });

      // 设置currentPageIndex
      this.slider.on("scrollEnd", () => {
        let pageIndex = this.slider.getCurrentPage().pageX;
        if (this.loop) {
          pageIndex -= 1;
        }
        this.currentPageIndex = pageIndex;

        if (this.autoPlay) {
          this._play();
        }
      });
      //手动出发的时候清楚定时器
      this.slider.on("beforeScrollStart", () => {
        if (this.autoPlay) {
          clearTimeout(this.timer);
        }
      });
    },
    //初始化dots
    _initDots() {
      this.dots = new Array(this.children.length);
    },
    //轮播关键实现
    _play() {
      let pageIndex = this.currentPageIndex + 1;
      if (this.loop) {
        pageIndex += 1;
      }
      this.timer = setTimeout(() => {
        this.slider.goToPage(pageIndex, 0, 400);
      }, this.interval);
    }
  }
};
</script>

<style scoped lang="stylus" rel="stylesheet/stylus">
@import '~common/stylus/variable';

.slider {
  min-height: 1px;

  .slider-group {
    position: relative;
    overflow: hidden;
    white-space: nowrap;

    .slider-item {
      float: left;
      box-sizing: border-box;
      overflow: hidden;
      text-align: center;

      a {
        display: block;
        width: 100%;
        overflow: hidden;
        text-decoration: none;
      }

      img {
        display: block;
        width: 100%;
      }
    }
  }

  .dots {
    position: absolute;
    right: 0;
    left: 0;
    bottom: 12px;
    text-align: center;
    font-size: 0;

    .dot {
      display: inline-block;
      margin: 0 4px;
      width: 8px;
      height: 8px;
      border-radius: 50%;
      background: $color-text-l;

      &.active {
        width: 20px;
        border-radius: 5px;
        background: $color-text-ll;
      }
    }
  }
}
</style>

loading组件

<template>
  <div class="loading">
    <img width="24" height="24" src="./loading.gif">
    <p class="desc">{{title}}</p>
  </div>
</template>
<script type="text/ecmascript-6">
  export default {
    props: {
      title: {
        type: String,
        default: '正在载入...'
      }
    }
  }
</script>
<style scoped lang="stylus" rel="stylesheet/stylus">
  @import "~common/stylus/variable"
  .loading
    width: 100%
    text-align: center
    .desc
      line-height: 20px
      font-size: $font-size-small
      color: $color-text-l
</style>

接下来开发推荐页面滚动列表--仿原声应用的scorllview，所以抽出来一个公用组件Scroll.vue

<template>
  <div ref="wrapper">
    <slot></slot>
  </div>
</template>

<script type="text/ecmascript-6">
  import BScroll from 'better-scroll'

  export default {
    props: {
      probeType: {
        type: Number,
        default: 1
      },
      click: {
        type: Boolean,
        default: true
      },
      listenScroll: {
        type: Boolean,
        default: false
      },
      data: {
        type: Array,
        default: null
      },
      pullup: {
        type: Boolean,
        default: false
      },
      beforeScroll: {
        type: Boolean,
        default: false
      },
      refreshDelay: {
        type: Number,
        default: 20
      }
    },
    mounted() {
      setTimeout(() => {
        this._initScroll()
      }, 20)
    },
    methods: {
      _initScroll() {
        if (!this.$refs.wrapper) {
          return
        }
        this.scroll = new BScroll(this.$refs.wrapper, {
          probeType: this.probeType,
          click: this.click
        })

        if (this.listenScroll) {
          let me = this
          this.scroll.on('scroll', (pos) => {
            me.$emit('scroll', pos)
          })
        }

        if (this.pullup) {
          this.scroll.on('scrollEnd', () => {
            if (this.scroll.y <= (this.scroll.maxScrollY + 50)) {
              this.$emit('scrollToEnd')
            }
          })
        }

        if (this.beforeScroll) {
          this.scroll.on('beforeScrollStart', () => {
            this.$emit('beforeScroll')
          })
        }
      },
      disable() {
        this.scroll && this.scroll.disable()
      },
      enable() {
        this.scroll && this.scroll.enable()
      },
      refresh() {
        this.scroll && this.scroll.refresh()
      },
      //用于歌手页面
      scrollTo() {
        this.scroll && this.scroll.scrollTo.apply(this.scroll, arguments)
      },
      //用于歌手页面
      scrollToElement() {
        this.scroll && this.scroll.scrollToElement.apply(this.scroll, arguments)
      }
    },
    watch: {
      data() {
        setTimeout(() => {
          this.refresh()
        }, this.refreshDelay)
      }
    }
  }
</script>

<style scoped lang="stylus" rel="stylesheet/stylus">

</style>

recommend.vue 推荐页面

可能会遇到一个问题，初始化后不能滚动，是因为高度的问题，所以给img加了一个方法，注意h2标签的应用，以及图片懒加载，这里提到了vuex的使用，那怎么给vuex提交数据细心的同学可能会发现↓↓↓↓↓ scroll的用法，只对下面的第一个div起作用

通过图片的高度撑起盒子，通过loadImage的方法限制让方法只执行一次！很实用的方法

<template>
  <div class="recommend" ref="recommend">
    <scroll ref="scroll" class="recommend-content" :data="discList">
      <div>
        <div v-if="recommends.length" class="slider-wrapper" ref="sliderWrapper">
          <slider>
            <div v-for="item in recommends">
              <a :href="item.linkUrl">
                <img class="needsclick" @load="loadImage" :src="item.picUrl">
              </a>
            </div>
          </slider>
        </div>
        <div class="recommend-list">
          <h1 class="list-title">热门歌单推荐</h1>
          <ul>
            <li @click="selectItem(item)" v-for="item in discList" class="item">
              <div class="icon">
                <img width="60" height="60" v-lazy="item.imgurl">
              </div>
              <div class="text">
                <h2 class="name" v-html="item.creator.name"></h2>
                <p class="desc" v-html="item.dissname"></p>
              </div>
            </li>
          </ul>
        </div>
      </div>
      <div class="loading-container" v-show="!discList.length">
        <loading></loading>
      </div>
    </scroll>
    <router-view></router-view>
  </div>
</template>

<script type="text/ecmascript-6">
  import Slider from 'base/slider/slider'
  import Loading from 'base/loading/loading'
  import Scroll from 'base/scroll/scroll'
  import {getRecommend, getDiscList} from 'api/recommend'
  import {playlistMixin} from 'common/js/mixin'
  import {ERR_OK} from 'api/config'
  import {mapMutations} from 'vuex'

  export default {
    mixins: [playlistMixin],
    data() {
      return {
        recommends: [],
        discList: []
      }
    },
    created() {
      this._getRecommend()

      this._getDiscList()
    },
    methods: {
      handlePlaylist(playlist) {
        const bottom = playlist.length > 0 ? '60px' : ''

        this.$refs.recommend.style.bottom = bottom
        this.$refs.scroll.refresh()
      },
      //通过图片的高度撑起盒子，通过下面的方法限制让方法只执行一次！
      loadImage() {
        if (!this.checkloaded) {
          this.checkloaded = true
          this.$refs.scroll.refresh()
        }
      },
      selectItem(item) {
        this.$router.push({
          path: `/recommend/${item.dissid}`
        })
        this.setDisc(item)
      },
      _getRecommend() {
        getRecommend().then((res) => {
          if (res.code === ERR_OK) {
            this.recommends = res.data.slider
          }
        })
      },
      _getDiscList() {
        getDiscList().then((res) => {
          if (res.code === ERR_OK) {
            this.discList = res.data.list
          }
        })
      },
      ...mapMutations({
        setDisc: 'SET_DISC'
      })
    },
    components: {
      Slider,
      Loading,
      Scroll
    }
  }
</script>

<style scoped lang="stylus" rel="stylesheet/stylus">
  @import "~common/stylus/variable"

  .recommend
    position: fixed
    width: 100%
    top: 88px
    bottom: 0
    .recommend-content
      height: 100%
      overflow: hidden
      .slider-wrapper
        position: relative
        width: 100%
        overflow: hidden
      .recommend-list
        .list-title
          height: 65px
          line-height: 65px
          text-align: center
          font-size: $font-size-medium
          color: $color-theme
        .item
          display: flex
          box-sizing: border-box
          align-items: center
          padding: 0 20px 20px 20px
          .icon
            flex: 0 0 60px
            width: 60px
            padding-right: 20px
          .text
            display: flex
            flex-direction: column
            justify-content: center
            flex: 1
            line-height: 20px
            overflow: hidden
            font-size: $font-size-medium
            .name
              margin-bottom: 10px
              color: $color-text
            .desc
              color: $color-text-d
      .loading-container
        position: absolute
        width: 100%
        top: 50%
        transform: translateY(-50%)
</style>

为什么变量定义在created里面而不是data里面？

因为这些变量不需要被监听，定义在data、props中的变量vue都会添加一个getter、setter方法用来监听数据变化实现双向数据绑定

向上滚动Y值为负数

代码详细注释 listview组件

<template>
  <scroll @scroll="scroll"
          :listen-scroll="listenScroll"
          :probe-type="probeType"
          :data="data"
          class="listview"
          ref="listview">
    <ul>
      <li v-for="group in data" class="list-group" ref="listGroup">
        <h2 class="list-group-title">{{group.title}}</h2>
        <uL>
          <li @click="selectItem(item)" v-for="item in group.items" class="list-group-item">
            <img class="avatar" v-lazy="item.avatar">
            <span class="name">{{item.name}}</span>
          </li>
        </uL>
      </li>
    </ul>
    <div class="list-shortcut" @touchstart.stop.prevent="onShortcutTouchStart" @touchmove.stop.prevent="onShortcutTouchMove"
         @touchend.stop>
      <ul>
        <li v-for="(item, index) in shortcutList" :data-index="index" class="item"
            :class="{'current':currentIndex===index}">{{item}}
        </li>
      </ul>
    </div>
    <div class="list-fixed" ref="fixed" v-show="fixedTitle">
      <div class="fixed-title">{{fixedTitle}} </div>
    </div>
    <div v-show="!data.length" class="loading-container">
      <loading></loading>
    </div>
  </scroll>
</template>

<script type="text/ecmascript-6">
  import Scroll from 'base/scroll/scroll'
  import Loading from 'base/loading/loading'
  import {getData} from 'common/js/dom'

  const TITLE_HEIGHT = 30  //向上顶起的元素高度
  const ANCHOR_HEIGHT = 18 // 字母导航的高度 （字体高度加上padding值）

  export default {
    //接受参数的类型（父组件传入的数据）
    props: {
      data: {
        type: Array,
        default: []
      }
    },
    //计算属性
    computed: {
      //展示字母导航的数据
      shortcutList() {
        return this.data.map((group) => {
          return group.title.substr(0, 1)
        })
      },
      //字母浮层的数据
      fixedTitle() {
        if (this.scrollY > 0) {
          return ''
        }
        return this.data[this.currentIndex] ? this.data[this.currentIndex].title : ''
      }
    },
    data() {
      return {
        scrollY: -1, //scroll组件传入的y轴
        currentIndex: 0, //当前联动的下标
        diff: -1 //控制字母浮层是否被下一块内容顶上去，（是一个顶上去的效果）
      }
    }, //为什么要定义在created里面而不是data里面？
    created() {
      this.probeType = 3  //scroll组件需要的参数，表示不节流，慢滚动与快滚动都生效
      this.listenScroll = true //是否触发scroll组件的监听事件
      this.touch = {} //定义的一个touch事件
      this.listHeight = [] //获取list的高度，是一个数组
    },
    methods: {
      selectItem(item) {
        this.$emit('select', item)
      },
      onShortcutTouchStart(e) {
        let anchorIndex = getData(e.target, 'index')
        let firstTouch = e.touches[0]
        this.touch.y1 = firstTouch.pageY
        this.touch.anchorIndex = anchorIndex

        this._scrollTo(anchorIndex)
      },
      onShortcutTouchMove(e) {
        let firstTouch = e.touches[0]
        this.touch.y2 = firstTouch.pageY
        //最后 | 0 表示向下取整
        let delta = (this.touch.y2 - this.touch.y1) / ANCHOR_HEIGHT | 0
        let anchorIndex = parseInt(this.touch.anchorIndex) + delta

        this._scrollTo(anchorIndex)
      },
      refresh() {
        this.$refs.listview.refresh()
      },
      //获取scroll组件传入的scroll值
      scroll(pos) {
        this.scrollY = pos.y
      },
      //计算列表的高度
      _calculateHeight() {
        this.listHeight = []
        const list = this.$refs.listGroup
        let height = 0
        this.listHeight.push(height)
        for (let i = 0; i < list.length; i++) {
          let item = list[i]
          height += item.clientHeight
          this.listHeight.push(height)
        }
      },
      _scrollTo(index) {
        //控制touchstart,点击边缘地带
        if (!index && index !== 0) {
          return
        }
        //控制touchstart,点击边缘地带
        if (index < 0) {
          index = 0
        } else if (index > this.listHeight.length - 2) { // 控制touchmove,向上滚动的时候，可能大于最后一项的优化
          index = this.listHeight.length - 2
        }
        // 控制touchstart，点击后通过手动设置scrollY实现，点击联动
        this.scrollY = -this.listHeight[index]
        //实现列表的滚动
        this.$refs.listview.scrollToElement(this.$refs.listGroup[index], 0)
      }
    },
    watch: {
      //监听data，当数据变化，延迟20ms等都dom渲染完毕，再计算
      data() {
        setTimeout(() => {
          this._calculateHeight()
        }, 20)
      },
      //监听scrollY的值 
      scrollY(newY) {
        const listHeight = this.listHeight
        // 当滚动到顶部，newY>0
        if (newY > 0) {
          this.currentIndex = 0
          return
        }
        // 在中间部分滚动
        for (let i = 0; i < listHeight.length - 1; i++) {
          let height1 = listHeight[i]
          let height2 = listHeight[i + 1]
          if (-newY >= height1 && -newY < height2) {
            this.currentIndex = i
            this.diff = height2 + newY
            return
          }
        }
        // 当滚动到底部，且-newY大于最后一个元素的上限
        this.currentIndex = listHeight.length - 2
      },
      //控制字母浮层是否要被顶上去
      diff(newVal) {
        let fixedTop = (newVal > 0 && newVal < TITLE_HEIGHT) ? newVal - TITLE_HEIGHT : 0
        if (this.fixedTop === fixedTop) {
          return
        }
        this.fixedTop = fixedTop
        this.$refs.fixed.style.transform = `translate3d(0,${fixedTop}px,0)`
      }
    },
    components: {
      Scroll,
      Loading
    }
  }

</script>

<style scoped lang="stylus" rel="stylesheet/stylus">
  @import "~common/stylus/variable"

  .listview
    position: relative
    width: 100%
    height: 100%
    overflow: hidden
    background: $color-background
    .list-group
      padding-bottom: 30px
      .list-group-title
        height: 30px
        line-height: 30px
        padding-left: 20px
        font-size: $font-size-small
        color: $color-text-l
        background: $color-highlight-background
      .list-group-item
        display: flex
        align-items: center
        padding: 20px 0 0 30px
        .avatar
          width: 50px
          height: 50px
          border-radius: 50%
        .name
          margin-left: 20px
          color: $color-text-l
          font-size: $font-size-medium
    .list-shortcut
      position: absolute
      z-index: 30
      right: 0
      top: 50%
      transform: translateY(-50%)
      width: 20px
      padding: 20px 0
      border-radius: 10px
      text-align: center
      background: $color-background-d
      font-family: Helvetica
      .item
        padding: 3px
        line-height: 1
        color: $color-text-l
        font-size: $font-size-small
        &.current
          color: $color-theme
    .list-fixed
      position: absolute
      top: 0
      left: 0
      width: 100%
      .fixed-title
        height: 30px
        line-height: 30px
        padding-left: 20px
        font-size: $font-size-small
        color: $color-text-l
        background: $color-highlight-background
    .loading-container
      position: absolute
      width: 100%
      top: 50%
      transform: translateY(-50%)
</style>

Singer class类

export default class Singer {
  constructor({id, name}) {
    this.id = id
    this.name = name
    this.avatar = `https://y.gtimg.cn/music/photo_new/T001R300x300M000${id}.jpg?max_age=2592000`
  }
}

歌手页面 singer.vue ?‍? 代码注释，字母排序

引入listview组件，有一个20毫秒的定时器，关键在于左右联动的思路很重要，以及关于diff的处理增强用户体验

<template>
  <div class="singer" ref="singer">
    <list-view @select="selectSinger" :data="singers" ref="list"></list-view>
    <router-view></router-view>
  </div>
</template>

<script>
  import ListView from 'base/listview/listview'
  import {getSingerList} from 'api/singer'
  import {ERR_OK} from 'api/config'
  import Singer from 'common/js/singer'
  import {mapMutations} from 'vuex'  //对Mutations的封装是个语法糖
  import {playlistMixin} from 'common/js/mixin'

  const HOT_SINGER_LEN = 10
  const HOT_NAME = '热门'

  export default {
    mixins: [playlistMixin],
    data() {
      return {
        singers: []
      }
    },
    created() {
      this._getSingerList()
    },
    methods: {
      handlePlaylist(playlist) {
        const bottom = playlist.length > 0 ? '60px' : ''
        this.$refs.singer.style.bottom = bottom
        this.$refs.list.refresh()
      }, 
      //跳到歌手详情页面
      selectSinger(singer) {
        this.$router.push({
          path: `/singer/${singer.id}`
        })
        //调用被映射出来的方法，把数据传递到vuex里面，到这一步完成setter设置
        this.setSinger(singer)
      },
      _getSingerList() {
        getSingerList().then((res) => {
          if (res.code === ERR_OK) {
            this.singers = this._normalizeSinger(res.data.list)
          }
        })
      },
      //整理数据结构
      _normalizeSinger(list) {
      //首先定义热门数据对象
        let map = {
          hot: {
            title: HOT_NAME,
            items: []
          }
        }
        
        list.forEach((item, index) => {
        	//默认前10条为热门数据
          if (index < HOT_SINGER_LEN) {
            map.hot.items.push(new Singer({
              name: item.Fsinger_name,
              id: item.Fsinger_mid
            }))
          }
          //key 为ABCDEF。。。。。。
          const key = item.Findex
          if (!map[key]) {
            map[key] = {
              title: key,
              items: []
            }
          }
          map[key].items.push(new Singer({
            name: item.Fsinger_name,
            id: item.Fsinger_mid
          }))
        })
        // 为了得到有序列表，我们需要处理 map
        let ret = []
        let hot = []
        for (let key in map) {
          let val = map[key]
          if (val.title.match(/[a-zA-Z]/)) {
            ret.push(val)
          } else if (val.title === HOT_NAME) {
            hot.push(val)
          }
        }
        //对字母排序
        ret.sort((a, b) => {
          return a.title.charCodeAt(0) - b.title.charCodeAt(0)
        })
        return hot.concat(ret)
      },
      //做一层映射，映射到mutations
      ...mapMutations({
        setSinger: 'SET_SINGER'
      })
    },
    components: {
      ListView
    }
  }

</script>

nextTic延时函数 es6 FindIndex方法

vuex 状态管理

使用场景

  1. 多组件的状态共享
  2. 路由间复杂数据传递

vuex
mutation-type 用来定义常量，便于项目维护，mutation同步修改数据

export const SET_SINGER = 'SET_SINGER'

export const SET_PLAYING_STATE = 'SET_PLAYING_STATE'

export const SET_FULL_SCREEN = 'SET_FULL_SCREEN'

export const SET_PLAYLIST = 'SET_PLAYLIST'

export const SET_SEQUENCE_LIST = 'SET_SEQUENCE_LIST'

export const SET_PLAY_MODE = 'SET_PLAY_MODE'

export const SET_CURRENT_INDEX = 'SET_CURRENT_INDEX'

export const SET_DISC = 'SET_DISC'

export const SET_TOP_LIST = 'SET_TOP_LIST'

export const SET_SEARCH_HISTORY = 'SET_SEARCH_HISTORY'

export const SET_PLAY_HISTORY = 'SET_PLAY_HISTORY'

export const SET_FAVORITE_LIST = 'SET_FAVORITE_LIST'

mutations，接收两个参数，state就是state.js定义的变量，另一个就是入参（此参数要改变state里的值）

import * as types from './mutation-types'

const mutations = {
  [types.SET_SINGER](state, singer) {
    state.singer = singer
  },
  [types.SET_PLAYING_STATE](state, flag) {
    state.playing = flag
  },
  [types.SET_FULL_SCREEN](state, flag) {
    state.fullScreen = flag
  },
  [types.SET_PLAYLIST](state, list) {
    state.playlist = list
  },
  [types.SET_SEQUENCE_LIST](state, list) {
    state.sequenceList = list
  },
  [types.SET_PLAY_MODE](state, mode) {
    state.mode = mode
  },
  [types.SET_CURRENT_INDEX](state, index) {
    state.currentIndex = index
  },
  [types.SET_DISC](state, disc) {
    state.disc = disc
  },
  [types.SET_TOP_LIST](state, topList) {
    state.topList = topList
  },
  [types.SET_SEARCH_HISTORY](state, history) {
    state.searchHistory = history
  },
  [types.SET_PLAY_HISTORY](state, history) {
    state.playHistory = history
  },
  [types.SET_FAVORITE_LIST](state, list) {
    state.favoriteList = list
  }
}
export default mutations

getters，相当于vuex的计算属性

export const singer = state => state.singer

export const playing = state => state.playing

export const fullScreen = state => state.fullScreen

export const playlist = state => state.playlist

export const sequenceList = state => state.sequenceList

export const mode = state => state.mode

export const currentIndex = state => state.currentIndex

export const currentSong = (state) => {
  return state.playlist[state.currentIndex] || {}
}

export const disc = state => state.disc

export const topList = state => state.topList

export const searchHistory = state => state.searchHistory

export const playHistory = state => state.playHistory

export const favoriteList = state => state.favoriteList

index.js初始化vuex，启用debug

import Vue from 'vue'
import Vuex from 'vuex'
import * as actions from './actions'
import * as getters from './getters'
import state from './state'
import mutations from './mutations'
import createLogger from 'vuex/dist/logger' //通过他能在控制台看到每次修改的日志

Vue.use(Vuex)

const debug = process.env.NODE_ENV !== 'production'  //debug模式，是否是通过state来修改数据，只有在run dev 的模式下可行，应该他对性能也有消耗，不建议在正式环境使用

export default new Vuex.Store({
  actions,
  getters,
  state,
  mutations,
  strict: debug,
  plugins: debug ? [createLogger()] : []
})

state.js

import {playMode} from 'common/js/config'
import {loadSearch, loadPlay, loadFavorite} from 'common/js/cache'

const state = {
  singer: {},
  playing: false, //是否播放
  fullScreen: false, //是否全屏播放
  playlist: [], //播放列表
  sequenceList: [], // 顺序列表
  mode: playMode.sequence, //播放模式
  currentIndex: -1, //当前播放的那首歌
  disc: {},
  topList: {},
  searchHistory: loadSearch(),
  playHistory: loadPlay(),
  favoriteList: loadFavorite()
}

export default state

actions 处理异步操作、对mutations的封装（批量处理mutations）

import * as types from './mutation-types'
import {playMode} from 'common/js/config'
import {shuffle} from 'common/js/util'
import {saveSearch, clearSearch, deleteSearch, savePlay, saveFavorite, deleteFavorite} from 'common/js/cache'
//findindex 用来找出 歌曲在当前列表 下的index
function findIndex(list, song) {
  return list.findIndex((item) => {
    return item.id === song.id
  })
}
//选择播放
export const selectPlay = function ({commit, state}, {list, index}) {
  commit(types.SET_SEQUENCE_LIST, list) //设置值
  if (state.mode === playMode.random) {
    let randomList = shuffle(list)
    commit(types.SET_PLAYLIST, randomList)
    index = findIndex(randomList, list[index])
  } else {
    commit(types.SET_PLAYLIST, list)
  }
  commit(types.SET_CURRENT_INDEX, index) //播放索引
  commit(types.SET_FULL_SCREEN, true) //播放器打开
  commit(types.SET_PLAYING_STATE, true) //播放状态打开
}
//music-list里面的随机播放全部 事件
export const randomPlay = function ({commit}, {list}) {
  commit(types.SET_PLAY_MODE, playMode.random)
  commit(types.SET_SEQUENCE_LIST, list)
  let randomList = shuffle(list)
  commit(types.SET_PLAYLIST, randomList)
  commit(types.SET_CURRENT_INDEX, 0)
  commit(types.SET_FULL_SCREEN, true)
  commit(types.SET_PLAYING_STATE, true)
}

export const insertSong = function ({commit, state}, song) {
  let playlist = state.playlist.slice()
  let sequenceList = state.sequenceList.slice()
  let currentIndex = state.currentIndex
  // 记录当前歌曲
  let currentSong = playlist[currentIndex]
  // 查找当前列表中是否有待插入的歌曲并返回其索引
  let fpIndex = findIndex(playlist, song)
  // 因为是插入歌曲，所以索引+1
  currentIndex++
  // 插入这首歌到当前索引位置
  playlist.splice(currentIndex, 0, song)
  // 如果已经包含了这首歌
  if (fpIndex > -1) {
    // 如果当前插入的序号大于列表中的序号
    if (currentIndex > fpIndex) {
      playlist.splice(fpIndex, 1)
      currentIndex--
    } else {
      playlist.splice(fpIndex + 1, 1)
    }
  }

  let currentSIndex = findIndex(sequenceList, currentSong) + 1

  let fsIndex = findIndex(sequenceList, song)

  sequenceList.splice(currentSIndex, 0, song)

  if (fsIndex > -1) {
    if (currentSIndex > fsIndex) {
      sequenceList.splice(fsIndex, 1)
    } else {
      sequenceList.splice(fsIndex + 1, 1)
    }
  }

  commit(types.SET_PLAYLIST, playlist)
  commit(types.SET_SEQUENCE_LIST, sequenceList)
  commit(types.SET_CURRENT_INDEX, currentIndex)
  commit(types.SET_FULL_SCREEN, true)
  commit(types.SET_PLAYING_STATE, true)
}

export const saveSearchHistory = function ({commit}, query) {
  commit(types.SET_SEARCH_HISTORY, saveSearch(query))
}

export const deleteSearchHistory = function ({commit}, query) {
  commit(types.SET_SEARCH_HISTORY, deleteSearch(query))
}

export const clearSearchHistory = function ({commit}) {
  commit(types.SET_SEARCH_HISTORY, clearSearch())
}

export const deleteSong = function ({commit, state}, song) {
  let playlist = state.playlist.slice()
  let sequenceList = state.sequenceList.slice()
  let currentIndex = state.currentIndex
  let pIndex = findIndex(playlist, song)
  playlist.splice(pIndex, 1)
  let sIndex = findIndex(sequenceList, song)
  sequenceList.splice(sIndex, 1)
  if (currentIndex > pIndex || currentIndex === playlist.length) {
    currentIndex--
  }

  commit(types.SET_PLAYLIST, playlist)
  commit(types.SET_SEQUENCE_LIST, sequenceList)
  commit(types.SET_CURRENT_INDEX, currentIndex)

  if (!playlist.length) {
    commit(types.SET_PLAYING_STATE, false)
  } else {
    commit(types.SET_PLAYING_STATE, true)
  }
}

export const deleteSongList = function ({commit}) {
  commit(types.SET_CURRENT_INDEX, -1)
  commit(types.SET_PLAYLIST, [])
  commit(types.SET_SEQUENCE_LIST, [])
  commit(types.SET_PLAYING_STATE, false)
}

export const savePlayHistory = function ({commit}, song) {
  commit(types.SET_PLAY_HISTORY, savePlay(song))
}

export const saveFavoriteList = function ({commit}, song) {
  commit(types.SET_FAVORITE_LIST, saveFavorite(song))
}

export const deleteFavoriteList = function ({commit}, song) {
  commit(types.SET_FAVORITE_LIST, deleteFavorite(song))
}

用vuex在路由间传递复杂数据

歌手页面完成数据的设置，在歌手详情页面开始获取数据
代码注释：获取单个数据字段，刷新的边界处理

歌手详情页，为了组件重用抽出来一个music-list.vue,在此基础又抽出来一个song-list.vue，有两层组件

song类

将乱而散的数据整理成我们想要的数据

import {getLyric} from 'api/song'
import {ERR_OK} from 'api/config'
import {Base64} from 'js-base64'

export default class Song {
  constructor({id, mid, singer, name, album, duration, image, url}) {
    this.id = id
    this.mid = mid
    this.singer = singer
    this.name = name
    this.album = album
    this.duration = duration
    this.image = image
    this.url = url
  }

  getLyric() {
    if (this.lyric) {
      return Promise.resolve(this.lyric)
    }

    return new Promise((resolve, reject) => {
      getLyric(this.mid).then((res) => {
        if (res.retcode === ERR_OK) {
          this.lyric = Base64.decode(res.lyric)
          resolve(this.lyric)
        } else {
          reject('no lyric')
        }
      })
    })
  }
}
 //工厂函数，调用song类
export function createSong(musicData) {
  return new Song({
    id: musicData.songid,
    mid: musicData.songmid,
    singer: filterSinger(musicData.singer),
    name: musicData.songname,
    album: musicData.albumname,
    duration: musicData.interval,
    image: `https://y.gtimg.cn/music/photo_new/T002R300x300M000${musicData.albummid}.jpg?max_age=2592000`,
    url: `http://ws.stream.qqmusic.qq.com/${musicData.songid}.m4a?fromtag=46`
  })
}
//这个方法是将name数组按照/的方式展示，两个以上有效
function filterSinger(singer) {
  let ret = []
  if (!singer) {
    return ''
  }
  singer.forEach((s) => {
    ret.push(s.name)
  })
  return ret.join('/')
}

歌手详情页，transition动画、song类的应用

<template>
  <transition name="slide">
    <music-list :title="title" :bg-image="bgImage" :songs="songs"></music-list>
  </transition>
</template>

<script type="text/ecmascript-6">
  import MusicList from 'components/music-list/music-list'
  import {getSingerDetail} from 'api/singer'
  import {ERR_OK} from 'api/config'
  import {createSong} from 'common/js/song'
  import {mapGetters} from 'vuex'  //通过mapgetters语法糖

  export default {
    computed: {
    	//只需要数据结构的某一个字段
      title() {
        return this.singer.name
      },
      //只需要数据结构的某一个字段
      bgImage() {
        return this.singer.avatar
      },
      //位于计算属性，获取vuex里面的数据
      ...mapGetters([
        'singer'
      ])
    },
    data() {
      return {
        songs: []
      }
    },
    created() {
      this._getDetail()
    },
    methods: {
    //如果用户在当前页面刷新，返回上一个路由，这是一个边界问题
      _getDetail() {
        if (!this.singer.id) {
          this.$router.push('/singer')
          return
        }
        //请求数据
        getSingerDetail(this.singer.id).then((res) => {
          if (res.code === ERR_OK) {
            this.songs = this._normalizeSongs(res.data.list)
          }
        })
      },
      _normalizeSongs(list) {
        let ret = []
        list.forEach((item) => {
          let {musicData} = item
          if (musicData.songid && musicData.albummid) {
            ret.push(createSong(musicData))
          }
        })
        return ret
      }
    },
    components: {
      MusicList
    }
  }
</script>
 //只需要数据结构的某一个字段
<style scoped lang="stylus" rel="stylesheet/stylus">
  .slide-enter-active, .slide-leave-active
    transition: all 0.3s

  .slide-enter, .slide-leave-to
    transform: translate3d(100%, 0, 0)
                           x轴  , y轴  ,z轴
</style>

歌手详情，子组件music-list

<template>
  <div class="music-list">
    <div class="back" @click="back">
      <i class="icon-back"></i>
    </div>
    <h1 class="title" v-html="title"></h1>
    //歌手头像背景，关注背景图的设置，以及样式，传说中的10:7写法？？？？？？？
    <div class="bg-image" :style="bgStyle" ref="bgImage">
      <div class="play-wrapper">
        <div ref="playBtn" v-show="songs.length>0" class="play" @click="random">
          <i class="icon-play"></i>
          <span class="text">随机播放全部</span>
        </div>
      </div>
      //用来控制模糊层，但是兼容不好，pc、和部分安卓看不到效果，只有iOS可以看到
      <div class="filter" ref="filter"></div>
    </div>
    //用于歌曲列表向上滚动，来做遮挡层
    <div class="bg-layer" ref="layer"></div>
    <scroll :data="songs" @scroll="scroll"
            :listen-scroll="listenScroll" :probe-type="probeType" class="list" ref="list">
      <div class="song-list-wrapper">
        <song-list :songs="songs" :rank="rank" @select="selectItem"></song-list>
      </div>
      <div v-show="!songs.length" class="loading-container">
        <loading></loading>
      </div>
    </scroll>
  </div>
</template>

<script type="text/ecmascript-6">
  import Scroll from 'base/scroll/scroll'
  import Loading from 'base/loading/loading'
  import SongList from 'base/song-list/song-list'
  import {prefixStyle} from 'common/js/dom'
  import {playlistMixin} from 'common/js/mixin'
  import {mapActions} from 'vuex'  //语法糖用于获取actions

  const RESERVED_HEIGHT = 40 //重制高度，向上滚动的时候预留的高度
  //下面是用到的两个属性，拼接浏览器前缀做浏览器兼容
  const transform = prefixStyle('transform') 
  const backdrop = prefixStyle('backdrop-filter')

  export default {
    mixins: [playlistMixin],
    props: {
      bgImage: {
        type: String,
        default: ''
      },
      songs: {
        type: Array,
        default: []
      },
      title: {
        type: String,
        default: ''
      },
      rank: {
        type: Boolean,
        default: false
      }
    },
    data() {
      return {
        scrollY: 0
      }
    },
    computed: {
    //计算属性设置背景
      bgStyle() {
        return `background-image:url(${this.bgImage})`
      }
    },
    created() {
      this.probeType = 3
      this.listenScroll = true
    },
    mounted() {
      this.imageHeight = this.$refs.bgImage.clientHeight
      this.minTransalteY = -this.imageHeight + RESERVED_HEIGHT
      this.$refs.list.$el.style.top = `${this.imageHeight}px`
    },
    methods: {
      handlePlaylist(playlist) {
        const bottom = playlist.length > 0 ? '60px' : ''
        this.$refs.list.$el.style.bottom = bottom
        this.$refs.list.refresh()
      },
      scroll(pos) {
        this.scrollY = pos.y
      },
      back() {
        this.$router.back()
      },
      //当前点击的歌曲
      selectItem(item, index) {
        this.selectPlay({
          list: this.songs,
          index
        })
      },
      //随机播放全部歌曲
      random() {
        this.randomPlay({
          list: this.songs
        })
      },
      //一般会将这个方法放到methods对象的末尾
      ...mapActions([
        'selectPlay',
        'randomPlay'
      ])
    },
    watch: {
      scrollY(newVal) {
        let translateY = Math.max(this.minTransalteY, newVal) //最大不超过this.minTransalteY
        let scale = 1
        let zIndex = 0
        let blur = 0
        const percent = Math.abs(newVal / this.imageHeight) //获取绝对值
        if (newVal > 0) { //向上滚动的时候
          scale = 1 + percent
          zIndex = 10
        } else {
          blur = Math.min(20, percent * 20) //最小是20
        }

        this.$refs.layer.style[transform] = `translate3d(0,${translateY}px,0)`
        this.$refs.filter.style[backdrop] = `blur(${blur}px)`
        if (newVal < this.minTransalteY) {  //向上滚动的时候
          zIndex = 10
          this.$refs.bgImage.style.paddingTop = 0
          this.$refs.bgImage.style.height = `${RESERVED_HEIGHT}px`
          this.$refs.playBtn.style.display = 'none'
        } else { //向下滚动的时候再恢复默认
          this.$refs.bgImage.style.paddingTop = '70%'
          this.$refs.bgImage.style.height = 0
          this.$refs.playBtn.style.display = ''
        }
        this.$refs.bgImage.style[transform] = `scale(${scale})`
        this.$refs.bgImage.style.zIndex = zIndex
      }
    },
    components: {
      Scroll,
      Loading,
      SongList
    }
  }
</script>

<style scoped lang="stylus" rel="stylesheet/stylus">
  @import "~common/stylus/variable"
  @import "~common/stylus/mixin"

  .music-list
    position: fixed
    z-index: 100
    top: 0
    left: 0
    bottom: 0
    right: 0
    background: $color-background
    .back
      position absolute
      top: 0
      left: 6px
      z-index: 50
      .icon-back
        display: block
        padding: 10px
        font-size: $font-size-large-x
        color: $color-theme
    .title
      position: absolute
      top: 0
      left: 10%
      z-index: 40
      width: 80%
      no-wrap()
      text-align: center
      line-height: 40px
      font-size: $font-size-large
      color: $color-text
    .bg-image
      position: relative
      width: 100%
      height: 0
      padding-top: 70%
      transform-origin: top
      background-size: cover
      .play-wrapper
        position: absolute
        bottom: 20px
        z-index: 50
        width: 100%
        .play
          box-sizing: border-box
          width: 135px
          padding: 7px 0
          margin: 0 auto
          text-align: center
          border: 1px solid $color-theme
          color: $color-theme
          border-radius: 100px
          font-size: 0
          .icon-play
            display: inline-block
            vertical-align: middle
            margin-right: 6px
            font-size: $font-size-medium-x
          .text
            display: inline-block
            vertical-align: middle
            font-size: $font-size-small
      .filter
        position: absolute
        top: 0
        left: 0
        width: 100%
        height: 100%
        background: rgba(7, 17, 27, 0.4)
    .bg-layer
      position: relative
      height: 100%
      background: $color-background
    .list
      position: fixed
      top: 0
      bottom: 0
      width: 100%
      background: $color-background
      .song-list-wrapper
        padding: 20px 30px
      .loading-container
        position: absolute
        width: 100%
        top: 50%
        transform: translateY(-50%)
</style>

song-list子组件

<template>
  <div class="song-list">
    <ul>
      <li @click="selectItem(song, index)" class="item" v-for="(song, index) in songs">
        <div class="rank" v-show="rank">
          <span :class="getRankCls(index)" v-text="getRankText(index)"></span>
        </div>
        <div class="content">
          <h2 class="name">{{song.name}}</h2>
          <p class="desc">{{getDesc(song)}}</p>
        </div>
      </li>
    </ul>
  </div>
</template>

<script type="text/ecmascript-6">
  export default {
    props: {
      songs: {
        type: Array,
        default: []
      },
      rank: {
        type: Boolean,
        default: false
      }
    },
    methods: {
    //向父组件传递事件
      selectItem(item, index) {
        this.$emit('select', item, index)
      },
      getDesc(song) {
        return `${song.singer}·${song.album}`
      },
      getRankCls(index) {
        if (index <= 2) {
          return `icon icon${index}`
        } else {
          return 'text'
        }
      },
      getRankText(index) {
        if (index > 2) {
          return index + 1
        }
      }
    }
  }
</script>

<style scoped lang="stylus" rel="stylesheet/stylus">
  @import "~common/stylus/variable"
  @import "~common/stylus/mixin"

  .song-list
    .item
      display: flex
      align-items: center
      box-sizing: border-box
      height: 64px
      font-size: $font-size-medium
      .rank
        flex: 0 0 25px
        width: 25px
        margin-right: 30px
        text-align: center
        .icon
          display: inline-block
          width: 25px
          height: 24px
          background-size: 25px 24px
          &.icon0
            bg-image('first')
          &.icon1
            bg-image('second')
          &.icon2
            bg-image('third')
        .text
          color: $color-theme
          font-size: $font-size-large
      .content
        flex: 1
        line-height: 20px
        overflow: hidden
        .name
          no-wrap()
          color: $color-text
        .desc
          no-wrap()
          margin-top: 4px
          color: $color-text-d
</style>

随机播放 技术实现 随机数组

//随机数
function getRandomInt(min, max) {
  return Math.floor(Math.random() * (max - min + 1) + min)
}
//把数组打乱
export function shuffle(arr) {
  let _arr = arr.slice()
  for (let i = 0; i < _arr.length; i++) {
    let j = getRandomInt(0, i)
    let t = _arr[i]
    _arr[i] = _arr[j]
    _arr[j] = t
  }
  return _arr
}

export function debounce(func, delay) {
  let timer

  return function (...args) {
    if (timer) {
      clearTimeout(timer)
    }
    timer = setTimeout(() => {
      func.apply(this, args)
    }, delay)
  }
}

时间戳转分秒 补零方法

 //转换时间
 format(interval) {
   interval = interval | 0 //时间戳 向下取整
   const minute = interval / 60 | 0  //向下取整
   const second = this._pad(interval % 60)
   return `${minute}:${second}`
 },
  //时间补零 n相当于补充的字符串的长度
 _pad(num, n = 2) {
   let len = num.toString().length //获取字符串的长度
   while (len < n) {
     num = '0' + num
     len++
   }
   return num
 },

播放器内置组件 player.vue，通过actions的方法--selectPlay,在此组件拿到currentSong，这里再重点说一下mutations和它的type要做到命名一致，nutations本质就是函数，第一个参数是state第二个参数是要修改的对象值

条形进度条应用到全屏播放

clientWidth 为content+padding的值

<template>
  <div class="progress-bar" ref="progressBar" @click="progressClick">
    <div class="bar-inner">
      <!-- 背景 -->
      <div class="progress" ref="progress"></div>
      <!-- 小圆点 -->
      <div class="progress-btn-wrapper" ref="progressBtn"
           @touchstart.prevent="progressTouchStart"
           @touchmove.prevent="progressTouchMove"
           @touchend="progressTouchEnd"
      >
        <div class="progress-btn"></div>
      </div>
    </div>
  </div>
</template>

<script type="text/ecmascript-6">
  import {prefixStyle} from 'common/js/dom'

  const progressBtnWidth = 16
  const transform = prefixStyle('transform')

  export default {
    props: {
      percent: {
        type: Number,
        default: 0
      }
    },
    created() {
      this.touch = {}  //创建一个touch对象
    },
    methods: {
      progressTouchStart(e) {
        //创建一个标志，意思它已经初始化完
        this.touch.initiated = true
        //手指的位置
        this.touch.startX = e.touches[0].pageX
        //当前滚动，滚动条的位置
        this.touch.left = this.$refs.progress.clientWidth
      },
      progressTouchMove(e) {
        //如果初始化完则什么都不做
        if (!this.touch.initiated) {
          return
        }
        const deltaX = e.touches[0].pageX - this.touch.startX //计算差值 
        //max 的0  意思不能小于0 、、、、min，不能超过整个滚动条的宽度
        const offsetWidth = Math.min(this.$refs.progressBar.clientWidth - progressBtnWidth, Math.max(0, this.touch.left + deltaX)) 
        this._offset(offsetWidth)
      },
      progressTouchEnd() {
        this.touch.initiated = false
        //滚动完后要给父组件派发一个事件
        this._triggerPercent()
      },
      //点击改变歌曲播放进度
      progressClick(e) {
        const rect = this.$refs.progressBar.getBoundingClientRect() //是一个获取距离的方法 也就是当前内容距离屏幕的左右间距
        const offsetWidth = e.pageX - rect.left
        this._offset(offsetWidth)
        // 这里当我们点击 progressBtn 的时候，e.offsetX 获取不对
        // this._offset(e.offsetX)
        this._triggerPercent()
      },
      _triggerPercent() {
        const barWidth = this.$refs.progressBar.clientWidth - progressBtnWidth
        const percent = this.$refs.progress.clientWidth / barWidth
        this.$emit('percentChange', percent)
      },
      //偏移方法
      _offset(offsetWidth) {
        this.$refs.progress.style.width = `${offsetWidth}px`  //获取进度条的位置，距离左右的距离
        this.$refs.progressBtn.style[transform] = `translate3d(${offsetWidth}px,0,0)`  //小球的偏移
      }
    },
    watch: {
      //它是不断改变的
      percent(newPercent) {
        //大于0 而且不是在拖动的状态下，拖动的时候不要改变
        if (newPercent >= 0 && !this.touch.initiated) {
          const barWidth = this.$refs.progressBar.clientWidth - progressBtnWidth  //进度条的总宽度 内容-按钮的宽度
          const offsetWidth = newPercent * barWidth //应该偏移的宽度
          this._offset(offsetWidth)
        }
      }
    }
  }
</script>

<style scoped lang="stylus" rel="stylesheet/stylus">
  @import "~common/stylus/variable"

  .progress-bar
    height: 30px
    .bar-inner
      position: relative
      top: 13px
      height: 4px
      background: rgba(0, 0, 0, 0.3)
      .progress
        position: absolute
        height: 100%
        background: $color-theme
      .progress-btn-wrapper
        position: absolute
        left: -8px
        top: -13px
        width: 30px
        height: 30px
        .progress-btn
          position: relative
          top: 7px
          left: 7px
          box-sizing: border-box
          width: 16px
          height: 16px
          border: 3px solid $color-text
          border-radius: 50%
          background: $color-theme
</style>

圆形进度条 用到SVG

<template>
  <div class="progress-circle">
    <!-- viewBox 视口位置 width、height 是显示到页面的宽高 -->
    <svg :width="radius" :height="radius" viewBox="0 0 100 100" version="1.1" xmlns="http://www.w3.org/2000/svg">
      <!-- 内层圆圈 r半径 cx\yx为圆心的坐标，说明这个圆是100的宽度 -->
      <circle class="progress-background" r="50" cx="50" cy="50" fill="transparent"/>
      <!-- 外层圆圈 stroke-dasharray描边 stroke-dashoffset偏移量-->
      <circle class="progress-bar" r="50" cx="50" cy="50" fill="transparent" :stroke-dasharray="dashArray"
              :stroke-dashoffset="dashOffset"/>
    </svg>
    <slot></slot>
  </div>
</template>

<script type="text/ecmascript-6">
  export default {
    props: {
      radius: {
        type: Number,
        default: 100
      },
      percent: {
        type: Number,
        default: 0
      }
    },
    data() {
      return {
        dashArray: Math.PI * 100
      }
    },
    computed: {
      dashOffset() {
        return (1 - this.percent) * this.dashArray
      }
    }
  }
</script>

<style scoped lang="stylus" rel="stylesheet/stylus">
  @import "~common/stylus/variable"

  .progress-circle
    position: relative
    circle
      stroke-width: 8px
      transform-origin: center
      &.progress-background
        transform: scale(0.9)
        stroke: $color-theme-d
      &.progress-bar
        transform: scale(0.9) rotate(-90deg)
        stroke: $color-theme
</style>

播放器内核

<template>
  <div class="player" v-show="playlist.length>0">
    <!-- 下面用到了动画的js钩子，用它来实现左下到右上的飞跃 -->
    <transition name="normal"
                @enter="enter" 
                @after-enter="afterEnter" 
                @leave="leave"
                @after-leave="afterLeave"
    >
    <!-- 全屏播放器 -->
      <div class="normal-player" v-show="fullScreen">
        <!-- 背景虚化处理 -->
        <div class="background">
          <img width="100%" height="100%" :src="currentSong.image">
        </div>
        <div class="top">
           <!-- 收起按钮 -->
          <div class="back" @click="back">
            <i class="icon-back"></i>
          </div>
          <!-- 标题/作者 -->
          <h1 class="title" v-html="currentSong.name"></h1>
          <h2 class="subtitle" v-html="currentSong.singer"></h2>
        </div>
        <div class="middle"
             @touchstart.prevent="middleTouchStart"
             @touchmove.prevent="middleTouchMove"
             @touchend="middleTouchEnd"
        >
          <!-- 播放器左侧 -->
          <div class="middle-l" ref="middleL">
            <div class="cd-wrapper" ref="cdWrapper">
              <!-- 当前播放歌曲的海报 -->
              <div class="cd" :class="cdCls">
                <img class="image" :src="currentSong.image">
              </div>
            </div>
            <div class="playing-lyric-wrapper">
              <div class="playing-lyric">{{playingLyric}}</div>
            </div>
          </div>
          <!-- 播放器右侧 歌词列表 -->
          <scroll class="middle-r" ref="lyricList" :data="currentLyric && currentLyric.lines">
            <div class="lyric-wrapper">
              <div v-if="currentLyric">
                <p ref="lyricLine"
                   class="text"
                   :class="{'current': currentLineNum ===index}"
                   v-for="(line,index) in currentLyric.lines">{{line.txt}}</p>
              </div>
            </div>
          </scroll>
        </div>
        <div class="bottom">
          <div class="dot-wrapper">
            <span class="dot" :class="{'active':currentShow==='cd'}"></span>
            <span class="dot" :class="{'active':currentShow==='lyric'}"></span>
          </div>
          <!-- 条形进度条的大盒子 -->
          <div class="progress-wrapper">
            <!-- 歌曲开始播放时间 -->
            <span class="time time-l">{{format(currentTime)}}</span>
            <!-- 条形进度条 -->
            <div class="progress-bar-wrapper">
              <progress-bar :percent="percent" @percentChange="onProgressBarChange"></progress-bar>
            </div>
            <!-- 歌曲结束时间 -->
            <span class="time time-r">{{format(currentSong.duration)}}</span>
          </div>
          <div class="operators">
            <!-- 歌曲播放模式 -->
            <div class="icon i-left" @click="changeMode">
              <i :class="iconMode"></i>
            </div>
            <!-- 上一首 -->
            <div class="icon i-left" :class="disableCls">
              <i @click="prev" class="icon-prev"></i>
            </div>
            <!-- 播放与暂停 -->
            <div class="icon i-center" :class="disableCls">
              <i @click="togglePlaying" :class="playIcon"></i>
            </div>
            <!-- 下一首 -->
            <div class="icon i-right" :class="disableCls">
              <i @click="next" class="icon-next"></i>
            </div>
            <!-- 收藏按钮 -->
            <div class="icon i-right">
              <i @click="toggleFavorite(currentSong)" class="icon" :class="getFavoriteIcon(currentSong)"></i>
            </div>
          </div>
        </div>
      </div>
    </transition>
    <!-- 收起后的迷你播放器 -->
    <transition name="mini">
      <div class="mini-player" v-show="!fullScreen" @click="open">
        <div class="icon">
          <img :class="cdCls" width="40" height="40" :src="currentSong.image">
        </div>
        <div class="text">
          <h2 class="name" v-html="currentSong.name"></h2>
          <p class="desc" v-html="currentSong.singer"></p>
        </div>
        <!-- 圆形进度条 用到svg -->
        <div class="control">
          <progress-circle :radius="radius" :percent="percent">
            <i @click.stop="togglePlaying" class="icon-mini" :class="miniIcon"></i>
          </progress-circle>
        </div>
        <div class="control" @click.stop="showPlaylist">
          <i class="icon-playlist"></i>
        </div>
      </div>
    </transition>
    <playlist ref="playlist"></playlist>
    <!-- 音频播放器 核心 -->
    <audio ref="audio" :src="currentSong.url" @play="ready" @error="error" @timeupdate="updateTime"
           @ended="end"></audio>
  </div>
</template>

<script type="text/ecmascript-6">
  import {mapGetters, mapMutations, mapActions} from 'vuex'
  import animations from 'create-keyframe-animation' //用到这个动画库
  import {prefixStyle} from 'common/js/dom'
  import ProgressBar from 'base/progress-bar/progress-bar'
  import ProgressCircle from 'base/progress-circle/progress-circle'
  import {playMode} from 'common/js/config'
  import Lyric from 'lyric-parser'
  import Scroll from 'base/scroll/scroll'
  import {playerMixin} from 'common/js/mixin'
  import Playlist from 'components/playlist/playlist'
  //下面的对象是 'common/js/config' 里面的内容
// export const playMode = {
//   sequence: 0, //顺序播放
//   loop: 1, //循环播放
//   random: 2 //随机播放
// }

  const transform = prefixStyle('transform')
  const transitionDuration = prefixStyle('transitionDuration')

  export default {
    mixins: [playerMixin],
    data() {
      return {
        songReady: false, //控制播放器，歌曲加载完后再走下面的逻辑
        currentTime: 0, //当前歌曲播放的时间
        radius: 32,
        currentLyric: null,
        currentLineNum: 0,
        currentShow: 'cd',
        playingLyric: ''
      }
    },
    computed: {
      cdCls() {
        return this.playing ? 'play' : 'play pause'
      },
      //字体图标的应用
      playIcon() {
        return this.playing ? 'icon-pause' : 'icon-play'
      },
      //字体图标的应用
      miniIcon() {
        return this.playing ? 'icon-pause-mini' : 'icon-play-mini'
      },
      //添加歌曲不能播放的状态样式
      disableCls() {
        return this.songReady ? '' : 'disable'
      },
      //歌曲播放的比例
      percent() {
        return this.currentTime / this.currentSong.duration
      },
      ...mapGetters([
        'currentIndex',
        'fullScreen',
        'playing'
      ])
    },
    created() {
      this.touch = {}
    },
    methods: {
      back() {
        this.setFullScreen(false)
      },
      open() {
        this.setFullScreen(true)
      },
      // el 是元素、done执行会跳到afterEnter
      enter(el, done) {
        const {x, y, scale} = this._getPosAndScale()
        //从零先跳到那个初始化的位置，60的时候放大，100的时候恢复正常
        let animation = {
          0: {
            transform: `translate3d(${x}px,${y}px,0) scale(${scale})`
          },
          60: {
            transform: `translate3d(0,0,0) scale(1.1)`
          },
          100: {
            transform: `translate3d(0,0,0) scale(1)`
          }
        }

        animations.registerAnimation({
          name: 'move',
          animation,
          presets: {
            duration: 400,
            easing: 'linear'
          }
        })
        // 把动画追加到制定元素
        animations.runAnimation(this.$refs.cdWrapper, 'move', done)
      },
      afterEnter() {
        animations.unregisterAnimation('move')
        this.$refs.cdWrapper.style.animation = ''
      },
      // el 是元素、done执行会跳到afterLeaave
      leave(el, done) {
        this.$refs.cdWrapper.style.transition = 'all 0.4s'
        const {x, y, scale} = this._getPosAndScale()
        this.$refs.cdWrapper.style[transform] = `translate3d(${x}px,${y}px,0) scale(${scale})`
        this.$refs.cdWrapper.addEventListener('transitionend', done)
      },
      afterLeave() {
        this.$refs.cdWrapper.style.transition = ''
        this.$refs.cdWrapper.style[transform] = ''
      },
      // 切换歌曲播放与暂停
      togglePlaying() {
        if (!this.songReady) {
          return
        }
        this.setPlayingState(!this.playing)
        if (this.currentLyric) {
          this.currentLyric.togglePlay()
        }
      },
      //歌曲播放结束事件
      end() {
        //如果是单曲循环，播放结束后再次播放
        if (this.mode === playMode.loop) {
          this.loop()
        } else {
          this.next()
        }
      },
      loop() {
        this.$refs.audio.currentTime = 0
        this.$refs.audio.play()
        this.setPlayingState(true)
        if (this.currentLyric) {
          this.currentLyric.seek(0)
        }
      },
      // 切换下一首歌曲
      next() {
        //歌曲没有加载完
        if (!this.songReady) {
          return
        }
        if (this.playlist.length === 1) {
          this.loop()
          return
        } else {
          let index = this.currentIndex + 1 //下一首歌，所以要加一
          //如果到底类，就重置为0
          if (index === this.playlist.length) {
            index = 0
          }
          //设置vuex的index
          this.setCurrentIndex(index)
         //如果是暂停状态下，切换，就调取方法改变它的值 
          if (!this.playing) {
            this.togglePlaying()
          }
        }
        this.songReady = false
      },
      prev() {
         //歌曲没有加载完
        if (!this.songReady) {
          return
        }
        if (this.playlist.length === 1) {
          this.loop()
          return
        } else {
          let index = this.currentIndex - 1
          //如果到头，就换成最后一首歌
          if (index === -1) {
            index = this.playlist.length - 1
          }
          this.setCurrentIndex(index)
          //如果是暂停状态下，切换，就调取方法改变它的值 
          if (!this.playing) {
            this.togglePlaying()
          }
        }
        this.songReady = false
      },
      //歌曲加载完事件
      ready() {
        this.songReady = true
        this.savePlayHistory(this.currentSong)
      },
      error() {
        this.songReady = true
      },
      //获取歌曲当前播放的时间长度
      updateTime(e) {
        this.currentTime = e.target.currentTime
      },
      //转换时间
      format(interval) {
        interval = interval | 0 //时间戳 向下取整
        const minute = interval / 60 | 0  //向下取整
        const second = this._pad(interval % 60)
        return `${minute}:${second}`
      },
      //监听子组件返回的数值，改变播放器的进度
      onProgressBarChange(percent) {
        const currentTime = this.currentSong.duration * percent
        this.$refs.audio.currentTime = currentTime
        //如果当前状态没有播放，就去播放歌曲
        if (!this.playing) {
          this.togglePlaying()
        }
        if (this.currentLyric) {
          this.currentLyric.seek(currentTime * 1000)
        }
      },
      getLyric() {
        this.currentSong.getLyric().then((lyric) => {
          if (this.currentSong.lyric !== lyric) {
            return
          }
          this.currentLyric = new Lyric(lyric, this.handleLyric)
          if (this.playing) {
            this.currentLyric.play()
          }
        }).catch(() => {
          this.currentLyric = null
          this.playingLyric = ''
          this.currentLineNum = 0
        })
      },
      handleLyric({lineNum, txt}) {
        this.currentLineNum = lineNum
        if (lineNum > 5) {
          let lineEl = this.$refs.lyricLine[lineNum - 5]
          this.$refs.lyricList.scrollToElement(lineEl, 1000)
        } else {
          this.$refs.lyricList.scrollTo(0, 0, 1000)
        }
        this.playingLyric = txt
      },
      showPlaylist() {
        this.$refs.playlist.show()
      },
      middleTouchStart(e) {
        this.touch.initiated = true
        // 用来判断是否是一次移动
        this.touch.moved = false
        const touch = e.touches[0]
        this.touch.startX = touch.pageX
        this.touch.startY = touch.pageY
      },
      middleTouchMove(e) {
        if (!this.touch.initiated) {
          return
        }
        const touch = e.touches[0]
        const deltaX = touch.pageX - this.touch.startX
        const deltaY = touch.pageY - this.touch.startY
        if (Math.abs(deltaY) > Math.abs(deltaX)) {
          return
        }
        if (!this.touch.moved) {
          this.touch.moved = true
        }
        const left = this.currentShow === 'cd' ? 0 : -window.innerWidth
        const offsetWidth = Math.min(0, Math.max(-window.innerWidth, left + deltaX))
        this.touch.percent = Math.abs(offsetWidth / window.innerWidth)
        this.$refs.lyricList.$el.style[transform] = `translate3d(${offsetWidth}px,0,0)`
        this.$refs.lyricList.$el.style[transitionDuration] = 0
        this.$refs.middleL.style.opacity = 1 - this.touch.percent
        this.$refs.middleL.style[transitionDuration] = 0
      },
      middleTouchEnd() {
        if (!this.touch.moved) {
          return
        }
        let offsetWidth
        let opacity
        if (this.currentShow === 'cd') {
          if (this.touch.percent > 0.1) {
            offsetWidth = -window.innerWidth
            opacity = 0
            this.currentShow = 'lyric'
          } else {
            offsetWidth = 0
            opacity = 1
          }
        } else {
          if (this.touch.percent < 0.9) {
            offsetWidth = 0
            this.currentShow = 'cd'
            opacity = 1
          } else {
            offsetWidth = -window.innerWidth
            opacity = 0
          }
        }
        const time = 300
        this.$refs.lyricList.$el.style[transform] = `translate3d(${offsetWidth}px,0,0)`
        this.$refs.lyricList.$el.style[transitionDuration] = `${time}ms`
        this.$refs.middleL.style.opacity = opacity
        this.$refs.middleL.style[transitionDuration] = `${time}ms`
        this.touch.initiated = false
      },
      //时间补零 n相当于补充的字符串的长度
      _pad(num, n = 2) {
        let len = num.toString().length //获取字符串的长度
        while (len < n) {
          num = '0' + num
          len++
        }
        return num
      },
      _getPosAndScale() {
        const targetWidth = 40 //目标宽度，小圆圈的宽度
        const paddingLeft = 40 //目标宽度，小圆圈的左边距
        const paddingBottom = 30 //目标宽度，小圆圈的下边距
        const paddingTop = 80 //大唱片到页面顶部的距离
        const width = window.innerWidth * 0.8 //大唱片的宽度，因为设置的是80%
        const scale = targetWidth / width //初开始的缩放
        const x = -(window.innerWidth / 2 - paddingLeft) //初始的x轴，从左下到右上所以是负值
        const y = window.innerHeight - paddingTop - width / 2 - paddingBottom //初始化 y轴  2分支1的宽度
        return {
          x,
          y,
          scale
        }
      },
      ...mapMutations({
        setFullScreen: 'SET_FULL_SCREEN'
      }),
      ...mapActions([
        'savePlayHistory'
      ])
    },
    watch: {
      currentSong(newSong, oldSong) {
        if (!newSong.id) {
          return
        }
        //发现ID没变 就什么都不做，在切换模式的时候用到
        if (newSong.id === oldSong.id) {
          return
        }
        if (this.currentLyric) {
          this.currentLyric.stop()
          this.currentTime = 0
          this.playingLyric = ''
          this.currentLineNum = 0
        }
        // 函数防抖的处理
        clearTimeout(this.timer)
        this.timer = setTimeout(() => {
          this.$refs.audio.play()
          this.getLyric()
        }, 1000)
      },
      //控制暂停和播放
      playing(newPlaying) {
        //先缓存一下引用
        const audio = this.$refs.audio
        this.$nextTick(() => {
          newPlaying ? audio.play() : audio.pause()
        })
      },
      fullScreen(newVal) {
        if (newVal) {
          setTimeout(() => {
            this.$refs.lyricList.refresh()
          }, 20)
        }
      }
    },
    components: {
      ProgressBar,
      ProgressCircle,
      Scroll,
      Playlist
    }
  }
</script>

<style scoped lang="stylus" rel="stylesheet/stylus">
  @import "~common/stylus/variable"
  @import "~common/stylus/mixin"

  .player
    .normal-player
      position: fixed
      left: 0
      right: 0
      top: 0
      bottom: 0
      z-index: 150
      background: $color-background
      .background
        position: absolute
        left: 0
        top: 0
        width: 100%
        height: 100%
        z-index: -1
        opacity: 0.6
        filter: blur(20px)
      .top
        position: relative
        margin-bottom: 25px
        .back
          position absolute
          top: 0
          left: 6px
          z-index: 50
          .icon-back
            display: block
            padding: 9px
            font-size: $font-size-large-x
            color: $color-theme
            transform: rotate(-90deg)
        .title
          width: 70%
          margin: 0 auto
          line-height: 40px
          text-align: center
          no-wrap()
          font-size: $font-size-large
          color: $color-text
        .subtitle
          line-height: 20px
          text-align: center
          font-size: $font-size-medium
          color: $color-text
      .middle
        position: fixed
        width: 100%
        top: 80px
        bottom: 170px
        white-space: nowrap
        font-size: 0
        .middle-l
          display: inline-block
          vertical-align: top
          position: relative
          width: 100%
          height: 0
          padding-top: 80%
          .cd-wrapper
            position: absolute
            left: 10%
            top: 0
            width: 80%
            height: 100%
            .cd
              width: 100%
              height: 100%
              box-sizing: border-box
              border: 10px solid rgba(255, 255, 255, 0.1)
              border-radius: 50%
              &.play
                animation: rotate 20s linear infinite
              &.pause
                animation-play-state: paused
              .image
                position: absolute
                left: 0
                top: 0
                width: 100%
                height: 100%
                border-radius: 50%

          .playing-lyric-wrapper
            width: 80%
            margin: 30px auto 0 auto
            overflow: hidden
            text-align: center
            .playing-lyric
              height: 20px
              line-height: 20px
              font-size: $font-size-medium
              color: $color-text-l
        .middle-r
          display: inline-block
          vertical-align: top
          width: 100%
          height: 100%
          overflow: hidden
          .lyric-wrapper
            width: 80%
            margin: 0 auto
            overflow: hidden
            text-align: center
            .text
              line-height: 32px
              color: $color-text-l
              font-size: $font-size-medium
              &.current
                color: $color-text
      .bottom
        position: absolute
        bottom: 50px
        width: 100%
        .dot-wrapper
          text-align: center
          font-size: 0
          .dot
            display: inline-block
            vertical-align: middle
            margin: 0 4px
            width: 8px
            height: 8px
            border-radius: 50%
            background: $color-text-l
            &.active
              width: 20px
              border-radius: 5px
              background: $color-text-ll
        .progress-wrapper
          display: flex
          align-items: center
          width: 80%
          margin: 0px auto
          padding: 10px 0
          .time
            color: $color-text
            font-size: $font-size-small
            flex: 0 0 30px
            line-height: 30px
            width: 30px
            &.time-l
              text-align: left
            &.time-r
              text-align: right
          .progress-bar-wrapper
            flex: 1
        .operators
          display: flex
          align-items: center
          .icon
            flex: 1
            color: $color-theme
            &.disable
              color: $color-theme-d
            i
              font-size: 30px
          .i-left
            text-align: right
          .i-center
            padding: 0 20px
            text-align: center
            i
              font-size: 40px
          .i-right
            text-align: left
          .icon-favorite
            color: $color-sub-theme
      &.normal-enter-active, &.normal-leave-active
        transition: all 0.4s
        .top, .bottom
          transition: all 0.4s cubic-bezier(0.86, 0.18, 0.82, 1.32)
      &.normal-enter, &.normal-leave-to
        opacity: 0
        .top
          transform: translate3d(0, -100px, 0)
        .bottom
          transform: translate3d(0, 100px, 0)
    .mini-player
      display: flex
      align-items: center
      position: fixed
      left: 0
      bottom: 0
      z-index: 180
      width: 100%
      height: 60px
      background: $color-highlight-background
      &.mini-enter-active, &.mini-leave-active
        transition: all 0.4s
      &.mini-enter, &.mini-leave-to
        opacity: 0
      .icon
        flex: 0 0 40px
        width: 40px
        padding: 0 10px 0 20px
        img
          border-radius: 50%
          &.play
            animation: rotate 10s linear infinite
          &.pause
            animation-play-state: paused
      .text
        display: flex
        flex-direction: column
        justify-content: center
        flex: 1
        line-height: 20px
        overflow: hidden
        .name
          margin-bottom: 2px
          no-wrap()
          font-size: $font-size-medium
          color: $color-text
        .desc
          no-wrap()
          font-size: $font-size-small
          color: $color-text-d
      .control
        flex: 0 0 30px
        width: 30px
        padding: 0 10px
        .icon-play-mini, .icon-pause-mini, .icon-playlist
          font-size: 30px
          color: $color-theme-d
        .icon-mini
          font-size: 32px
          position: absolute
          left: 0
          top: 0

  @keyframes rotate
    0%
      transform: rotate(0)
    100%
      transform: rotate(360deg)
</style>

一级页面向二级页面传参数

首先在路由中定义一个二级，path就是id，再回到推荐页面加一个routerview以及点击事件，到此完成第一步。见下面的部分代码

{
      path: '/recommend',
      component: Recommend,
      children: [
        {
          path: ':id',
          component: Disc
        }
      ]
    },

<div class="recommend-list">
          <h1 class="list-title">热门歌单推荐</h1>
          <ul>
            <li @click="selectItem(item)" v-for="item in discList" class="item">
              <div class="icon">
                <img width="60" height="60" v-lazy="item.imgurl">
              </div>
              <div class="text">
                <h2 class="name" v-html="item.creator.name"></h2>
                <p class="desc" v-html="item.dissname"></p>
              </div>
            </li>
          </ul>
        </div>
      </div>
      <div class="loading-container" v-show="!discList.length">
        <loading></loading>
      </div>
    </scroll>
    <router-view></router-view>
  </div>
</template>

selectItem(item) {
        this.$router.push({
          path: `/recommend/${item.dissid}`
        })
        this.setDisc(item)
      },

正则整理数据结构

看下面的数据，其实请求接口的时候设置了json但是还是返回了，jsonp的格式怎么办？

if (typeof ret === 'string') {
//以字母开始 +表示一位或多位 \( \) 转义小括号 ()用它来分组 {} 表示下面的{}符号 \(\)表示不是小括号的任意字符 +表示一个或者多个
      var reg = /^\w+\(({[^\(\)]+})\)$/
      var matches = response.data.match(reg)
      if (matches) {
        ret = JSON.parse(matches[1])
      }
    }

在这里插入图片描述

打包后如何运行dist目录

1、npm run build 是本地打包 2、新建prod.server.js 最后运行 node prod.server.js 就能把项目跑起来

var express = require('express')
var config = require('./config/index')
var axios = require('axios')

var port = process.env.PORT || config.build.port

var app = express()

var apiRoutes = express.Router()

apiRoutes.get('/getDiscList', function (req, res) {
  var url = 'https://c.y.qq.com/splcloud/fcgi-bin/fcg_get_diss_by_tag.fcg'
  axios.get(url, {
    headers: {
      referer: 'https://c.y.qq.com/',
      host: 'c.y.qq.com'
    },
    params: req.query
  }).then((response) => {
    res.json(response.data)
  }).catch((e) => {
    console.log(e)
  })
})

apiRoutes.get('/lyric', function (req, res) {
  var url = 'https://c.y.qq.com/lyric/fcgi-bin/fcg_query_lyric_new.fcg'

  axios.get(url, {
    headers: {
      referer: 'https://c.y.qq.com/',
      host: 'c.y.qq.com'
    },
    params: req.query
  }).then((response) => {
    var ret = response.data
    if (typeof ret === 'string') {
      var reg = /^\w+\(({[^\(\)]+})\)$/
      var matches = response.data.match(reg)
      if (matches) {
        ret = JSON.parse(matches[1])
      }
    }
    res.json(ret)
  }).catch((e) => {
    console.log(e)
  })
})

app.use('/api', apiRoutes)

app.use(express.static('./dist'))

module.exports = app.listen(port, function (err) {
  if (err) {
    console.log(err)
    return
  }
  console.log('Listening at http://localhost:' + port + '\n')
})

是为了在build里面加port 让项目跑在这个端口

config/index.js

// see http://vuejs-templates.github.io/webpack for documentation.
var path = require('path')
module.exports = {
  build: {
    env: require('./prod.env'),
    port: 9000,
    index: path.resolve(__dirname, '../dist/index.html'),
    assetsRoot: path.resolve(__dirname, '../dist'),
    assetsSubDirectory: 'static',
    assetsPublicPath: '',
    productionSourceMap: true,
    // Gzip off by default as many popular static hosts such as
    // Surge or Netlify already gzip all static assets for you.
    // Before setting to `true`, make sure to:
    // npm install --save-dev compression-webpack-plugin
    productionGzip: false,
    productionGzipExtensions: ['js', 'css'],
    // Run the build command with an extra argument to
    // View the bundle analyzer report after build finishes:
    // `npm run build --report`
    // Set to `true` or `false` to always turn it on or off
    bundleAnalyzerReport: process.env.npm_config_report
  },
  dev: {
    env: require('./dev.env'),
    port: 8080,
    autoOpenBrowser: true,
    assetsSubDirectory: 'static',
    assetsPublicPath: '/',
    proxyTable: {},
    // CSS Sourcemaps off by default because relative paths are "buggy"
    // with this option, according to the CSS-Loader README
    // (https://github.com/webpack/css-loader#sourcemaps)
    // In our experience, they generally work as expected,
    // just be aware of this issue when enabling this option.
    cssSourceMap: false
  }
}

如何优化首屏加载 提到了路由懒加载

让组件等于一个方法，这个方法再resolve这个组件

import Vue from 'vue'
import Router from 'vue-router'

Vue.use(Router)

const Recommend = (resolve) => {
  import('components/recommend/recommend').then((module) => {
    resolve(module)
  })
}

const Singer = (resolve) => {
  import('components/singer/singer').then((module) => {
    resolve(module)
  })
}

const Rank = (resolve) => {
  import('components/rank/rank').then((module) => {
    resolve(module)
  })
}

const Search = (resolve) => {
  import('components/search/search').then((module) => {
    resolve(module)
  })
}

const SingerDetail = (resolve) => {
  import('components/singer-detail/singer-detail').then((module) => {
    resolve(module)
  })
}

const Disc = (resolve) => {
  import('components/disc/disc').then((module) => {
    resolve(module)
  })
}

const TopList = (resolve) => {
  import('components/top-list/top-list').then((module) => {
    resolve(module)
  })
}

const UserCenter = (resolve) => {
  import('components/user-center/user-center').then((module) => {
    resolve(module)
  })
}

vue升级的注意事项

在devDependencies里面的vue-template-compiler一定要和vue的版本保持一致否则编译的时候会报错。

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标签：vuejs2.0

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