<el-table
        ref="multipleTable"
        :data="tableData"
        @select-all="handleSelectionChanges"
        :header-cell-style="{ background: '#FAFAFA', color: '#333333' }"
        @sort-change="sortChange"
      >
      // 设置prop值
       <el-table-column
          prop="endTime" 
          show-overflow-tooltip
          label="截止时间"
          sortable="custom"
          align="center"
          min-width="115"
        >

this.$nextTick(() => {
     if (endTimeSort === 2) {
       return;
     }
     endTimeSort
       ? this.$refs.multipleTable.sort('endTime', 'ascending')
       : this.$refs.multipleTable.sort('endTime', 'descending');
 });