<el-table @selection-change="handleSelectCodeForTicket" :data="tableData" :height="tableHeight" >
          <el-table-column
      type="selection"
      width="50">
    </el-table-column>
 </el-table>

  Selection: [],
methods: {
    // 选择
      handleSelectCodeForTicket (val) {
        console.log(val)
      this.Selection = []
      val.forEach(v => {
        this.Selection.push(v.code)
      })
    }
}