vue2.0结合DataTable插件实现表格动态刷新的方法详解

<template>
  <div class="row">
    <loadingHourGlass></loadingHourGlass>
    <div class="col-xs-12 top-offset-15 bottom-offset-15">
      <div>
        <strong class="pull-left line-height-24 right-offset-15">自动刷新开关:</strong>
        <iphoneSwitcher v-bind:status="refresh.status" v-bind:canSwitch="false" v-bind:callBackName="'switchRefreshStatus'"></iphoneSwitcher>
      </div>
      <button type="button" class="btn btn-sm btn-primary pull-right" v-on:click="editRecord()">添加任务</button>
    </div>
    <div class="col-xs-12 main-table-wrapper">
      <h4 class="page-header">点播刷新任务数据表格 <!-- <small>Secondary text</small> --></h4>
      <!-- <p>123</p> -->
      <table class="table table-striped table-hover table-bordered" id="main-table">
        <thead>
          <tr>
            <th>名称</th>
            <th>状态</th>
            <th>完成率</th>
            <th>创建时间</th>
            <th>备注</th>
            <th>操作</th>
          </tr>
        </thead>
        <tbody><!-- v-bind:class=" (item.completeCount/item.total=='1')?'text-success':'text-danger' " -->
          <tr v-for="item in tableList" v-bind:class="'id-' + item.id">
            <td>{{ item.file_name }}</td>
            <!-- {{ item.status | statusFilter }} -->
            <td class="status"></td>
            <!-- v-bind:class=" (item.completeCount/item.total=='1')?'text-success':'text-danger' " -->
            <!-- {{ item.completeRate }} -->
            <td class="rate"></td>
            <td>{{ item.create_time }}</td>
            <td>{{ item.description }}</td>
            <td>
              <button type="button" class="btn btn-primary btn-xs" v-on:click="showDetailModal(item.id,item.file_name)">详情</button>
              <!-- <button type="button" class="btn btn-danger btn-xs" v-on:click="test()">test</button> -->
            </td>
          </tr>
        </tbody>
      </table>
    </div>
  </div>
</template>

methods: {
  initRecordTable: function(){
    $('#main-table').DataTable({
      "paging": true,// 开启分页
      "pageLength": 10,//每页显示数量
      "lengthChange": true,//是否允许用户改变表格每页显示的记录数
      "searching": true,//搜索
      "ordering": true,//排序
      "info": true,//左下角 从 1 到 5 /共 23 条数据
      "autoWidth": true,
      // "scrollX": "100%",//表格的宽度
      // "scrollY": "200px",//表格的高度
      "scrollXInner": "100%",//表格的内容宽度
      // "bScrollCollapse":true,//当显示的数据不足以支撑表格的默认的高度时，依然显示纵向的滚动条。(默认是false)
      "aaSorting": [
        [3, 'asc']
      ],
      "language": {
        "sInfoEmpty": "没有数据",
        "sZeroRecords": "没有查找到满足条件的数据",
        "sInfo": "从 _START_ 到 _END_ /共 _TOTAL_ 条数据",
        "sLengthMenu": "每页显示 _MENU_ 条记录",
        "sInfoFiltered": "(从 _MAX_ 条数据中检索)",
        "oPaginate": {
          "sFirst": "首页",
          "sPrevious": "前一页",
          "sNext": "后一页",
          "sLast": "尾页"
        }
      },
    });
  },
  initQuery: function(){
    // status 和 rate两个字段是实时刷新的
    // dataTable摧毁和tableList赋值都砸在promise里完成
    // tableList只初始化的时候赋值一次 然后就不动了 用原生js去改变表格内的status字段
    let mySelf = this;
    let callback = function(){
      if($('#main-table').DataTable()){
        $('#main-table').DataTable().destroy()
      }
      mySelf.tableList = util.deepClone(mySelf.originTableList);
    }
    let queryTablePromise = mySelf.queryTable(callback);
    let promiseList = [];
    mySelf.clearRefresh();
    promiseList.push(queryTablePromise);
    Promise.all(promiseList).then(function (result) {
      console.log('ajax全部执行完毕：' + JSON.stringify(result)); // ["Hello", "World"]
      //renderTable函数只在首次进入页面时调用 1.毁掉dataTable插件 2.加载一次表格更新状态和完成率 3.调用自动刷新
      mySelf.renderTable();
      mySelf.updateRefreshStatus();
      mySelf.setRefresh();
    });
  },
  switchRefreshStatus: function(){
    let mySelf = this;
    let status = mySelf.refresh.status;
    let text = (status==true)?'关闭':'开启';
    let confirmCallback = null;
    if (status==true){
      confirmCallback = function(){
        mySelf.refresh.status = false;
      }
    }
    else{
      confirmCallback = function(){
        mySelf.refresh.status = true;
        mySelf.setRefresh();
      }
    }
    util.showConfirm('确认要' + text + '自动刷新么？',confirmCallback);
  },
  checkTaskRefresh: function(){
    let mySelf = this;
    let originTableList = mySelf.originTableList;
    let taskAllComplete = true;
    // console.log(JSON.stringify(mySelf.originTableList));
    originTableList.forEach(function(item,index,array){
      let completeTaskList = mySelf.refresh.completeTaskList;
      let completeRate = item.completeRate;
      //当前task完成 report给后端
      if (Number.parseInt(completeRate) == 1){
        // 若任务完成列表 没有这个TaskId 则发送请求
        if (!completeTaskList.includes(item.id)){
          console.log(item.id + "任务完成了！并且不存在于任务完成列表，现在发送完成请求！");
          mySelf.reportTaskComplete(item.id);
          mySelf.refresh.completeTaskList.push(item.id);
        }
      }
      else{
        taskAllComplete = false;
      }
    });
    if(taskAllComplete){
      console.log('全部任务都完成了！')
      return true;
    }
    return false;
  },
  setRefresh: function(){
    let mySelf = this;
    let status = mySelf.refresh.status;
    let interval = mySelf.refresh.interval;
    // 如果所有任务都完成了 则停止发送ajax请求 并更新最后一次
    if (mySelf.checkTaskRefresh()){
      console.log('更新最后一次表格！')
      mySelf.updateRefreshStatus();
      return false;
    }
    // console.log('refresh')
    if (status){
      mySelf.refresh.timer = setTimeout(function(){
        let queryTablePromise = mySelf.queryTable();
        let promiseList = [];
        promiseList.push(queryTablePromise);
        Promise.all(promiseList).then(function (result) {
          console.log('ajax全部执行完毕：' + JSON.stringify(result)); // ["Hello", "World"]
          mySelf.updateRefreshStatus();
          mySelf.setRefresh();
        });
      },interval);
    }
    else{
      mySelf.clearRefresh();
    }
  },
  updateRefreshStatus: function(){
    console.log('更新刷新状态')
    let mySelf = this;
    let mainTable = document.getElementById("main-table");
    let originTableList = mySelf.originTableList;
    originTableList.forEach(function(item,index,array){
      let trClassName = "id-" + item.id;
      // console.log(trClassName)
      // 获取当前页面展示的所有tr
      let trDom = mainTable.getElementsByClassName(trClassName)[0];
      // console.log(trDom)
      // 局部刷新个别字段
      if (trDom){
        let tdRate = trDom.getElementsByClassName("rate")[0];
        let tdStatus = trDom.getElementsByClassName("status")[0];
        tdRate.innerText = item.completeRate;
        tdRate.className = (item.status == "1")?"text-info rate":((item.status == "2")?"text-success rate":"text-danger rate");
        tdStatus.innerText = (item.status == "1")?"刷新中":((item.status == "2")?"刷新完成":"刷新失败");
        tdStatus.className = (item.status == "1")?"text-info status":((item.status == "2")?"text-success status":"text-danger status");
      }
    });
  },
  clearRefresh: function(){
    let mySelf = this;
    console.log('clear timer');
    clearTimeout(mySelf.refresh.timer);
  },
  queryTable: function(callback){
    let mySelf = this;
    let promise = new Promise(function (resolve, reject) {
      let url = pars.domain + "/api.php?Action=xxxxxxx&t=" + (new Date).getTime();
      $.get(url, function(res) {
        if (res.code == 0) {
          let resData = res.list;
          resData.forEach(function(item,index,array){
            let info = item.info;
            let completeCount = info.completeCount;
            let total = info.count;
            item.completeRate = ((completeCount/total)*100).toFixed(2) + "%";
          });
          // console.log(JSON.stringify(resData))
          mySelf.originTableList = resData;
          if (callback){
            callback();
          }
          resolve('queryTable完成！');
        }
        else{
          util.showDialog('error',"接口调用失败，报错信息为：" + res.message);
        }
      }, "json");
    });
    return promise;
  },
  renderTable: function(){
    let mySelf = this;
    mySelf.$nextTick(function(){
      mySelf.initRecordTable();
      util.hideLoading();
    })
  }
},
beforeRouteLeave (to, from, next){
  let mySelf = this;
  mySelf.clearRefresh();
  next();
},