多选表格，切换选中行的选中状态

  <div>
    <div v-if="selectionArray.length > 0" style="margin-left:30px;width:200px;overflow: hidden;text-overflow: ellipsis;white-space: nowrap;" class="show" @click="show">
          <el-tooltip
          placement="top-start"
          width="200"
          v-for="(item,index) in selectionArray"
          :key="index"
          trigger="hover"
         >
         <span slot="content" v-for="(item,index) in selectionArray" :key="index" style="margin:0 10px">
          {{item.name}}
         </span>
          <span style="margin:0 10px">{{item.name}}</span>
          </el-tooltip>
    </div>
    <el-table
          @selection-change="handleSelectionChange"
          :data="tableData"
          ref="tableData"
          >
          <el-table-column
            type="selection"
            width="55">
          </el-table-column>
          <el-table-column
            prop="date"
            label="日期"
            width="180">
          </el-table-column>
          <el-table-column
            prop="name"
            label="姓名"
            width="180">
          </el-table-column>
          <el-table-column
            prop="address"
            label="地址">
          </el-table-column>
        </el-table>
  </div>
</template>
<script>
  export default{
    data(){
      return{
        tableData: [
          {
          date: '2016-05-02',
          name: '张三',
          address: '上海市普陀区金沙江路 1518 弄'
        }, {
          date: '2016-05-04',
          name: '李四',
          address: '上海市普陀区金沙江路 1517 弄'
        }, {
          date: '2016-05-01',
          name: '王五',
          address: '上海市普陀区金沙江路 1519 弄'
        }, {
          date: '2016-05-03',
          name: '麻子',
          address: '上海市普陀区金沙江路 1516 弄'
        }],
        selectionArray:[]
      }
    },
    methods:{
      handleSelectionChange(val){
        this.selectionArray = val
      },
      show(){
        this.tableData = this.selectionArray
        this.$nextTick(() => {
            this.tableData.forEach(
            o => this.$refs.tableData.toggleRowSelection(o, true)
            )
        });
      },
    }
  }
</script>