getList() {
        this.listLoading = true

        this.getDepartmentTree()

        sysApi.getPageList(this.listQuery).then(response => {
          debugger
          let records = response.data.records
          this.list = [] 
          // 此法效率比较低
          for (let record of records) {
            if(record.createBy == this.$store.state.user.userName && record.delFlag == 0){
              console.log(this.treeSelectData)
              debugger
              for (let key in this.treeSelectData) {
                if(this.treeSelectData[key].id == record.makerId ){
                  record.makerId = this.treeSelectData[key].name
                }
              }
              this.list.push(record)
            }
          }
          this.total = this.list.length
          this.listLoading = false
        });
        this.$forceUpdate()
      },

说明：
this.getDepartmentTree()会向后端发起请求。
发起请求后，并不一定保证后端已经返回数据的情况下，前端会立即执行sysApi.getPageList及以下代码。
而不是阻塞，等待后端返回数据再去执行sysApi.getPageList