vue2.0 + element ui 实现表格穿梭框

element ui 官网里介绍了穿梭框（Transfer），但在实际使用过程中，会出现一些问题：

1.穿梭框里能放置的内容太少，不能满足复杂的业务需求。

2.当选项过多时，穿梭框很难实现分页，左右两个框的分页是联动的，左边翻页了右边也会跟着翻页。若要取消这种关联关系，可参考这篇文章： https://www.cnblogs.com/alice-bj/articles/10703903.html#_label4

本文参考了穿梭框的实现思路，实现了可分页的表格穿梭框，同时涉及到了表格多选与表格里添加表单等知识点。

html结构：

<el-form :inline="true" :model="staffTemp">
    <el-form-item label="手机号">
        <el-input v-model="staffTemp.phone"></el-input>
    </el-form-item>
    <el-form-item>
        <el-button type="primary" @click="getStaffList">查找</el-button>
    </el-form-item>
</el-form>
<el-row :gutter="20">
    <el-col :span="11">
        <el-table
            ref="staffTable"
            v-loading="listLoading"
            :key="tableKey"
            :data="staffList"
            border
            fit
            highlight-current-row
            @selection-change="handleStaffChange"
        >
            <el-table-column type="selection" :reserve-selection="true" width="55"></el-table-column>
            <el-table-column label="手机" align="center">
              <template slot-scope="{row}">
                <span>{{ row.phone }}</span>
              </template>
            </el-table-column>

            <el-table-column label="昵称" align="center">
              <template slot-scope="{row}">
                <span>{{ row.nickName }}</span>
              </template>
            </el-table-column>
        </el-table>
    </el-col>
    <el-col :span="2" style="text-align:center;">
        <el-button
            @click="addStaff"
            type="primary"
            :disabled="!staffData.length"
            icon="el-icon-arrow-right"
            circle
        ></el-button>
        <el-button
            @click="removeStaff"
            type="primary"
            :disabled="!selectedStaffData.length"
            icon="el-icon-arrow-left"
            circle
            style="margin-left: 0;margin-top: 10px;"
        ></el-button>
    </el-col>
    <el-col :span="11">
        <el-table
            ref="selectedStaffTable"
            v-loading="listLoading"
            :key="tableKey"
            :data="selectedStaffList"
            border
            fit
            highlight-current-row
            @selection-change="handleSelectedStaffChange"
          >
            <el-table-column type="selection" :reserve-selection="true" width="55"></el-table-column>
            <el-table-column label="手机" align="center">
              <template slot-scope="{row}">
                <span>{{ row.phone }}</span>
              </template>
            </el-table-column>

            <el-table-column label="昵称" align="center">
              <template slot-scope="{row}">
                <span>{{ row.nickName }}</span>
              </template>
            </el-table-column>

            <el-table-column label="类型" align="center">
              <template slot-scope="{row}">
                <el-select class="filter-item" placeholder="请选择" v-model="row.staffTypeId">
                  <el-option
                    v-for="item in staffOptions"
                    :key="item.key"
                    :label="item.display_name"
                    :value="item.key"
                  ></el-option>
                </el-select>
              </template>
            </el-table-column>
        </el-table>
    </el-col>
</el-row>

 js部分：

data() {
  return {
    listLoading: true,
    staffTemp: {
        phone: "",
        nickName: "",
        staffTypeId: ""
      },
    staffList: [],
    selectedStaffList: [],
    staffData: [],
    selectedStaffData: [],
    tableKey: 0,
    rowKey: "rowKey",
    staffOptions: [
        { key: 28, display_name: "补货员" },
        { key: 29, display_name: "测试员" }
      ],
  }
},
methods: {
    // 从后台获取左边表格的数据
    getStaffList() {
      fetchStaffList(this.staffTemp).then(res => {
        if (res.value.staff.length === 0) {
          alert("查无此人");
        }
        this.staffList = res.value.staff;
      });
    },
    // 将左边表格选择项存入staffData中
    handleStaffChange(rows) {
      this.staffData = [];
      if (rows) {
        rows.forEach(row => {
          if (row) {
            this.staffData.push(row);
          }
        });
      }
    },
    // 左边表格选择项移到右边
    addStaff() {
      setTimeout(() => {
        this.$refs["staffTable"].clearSelection();
        this.$refs["selectedStaffTable"].clearSelection();
      }, 0);
      let repeat = false;
      this.selectedStaffList.forEach(item => {
        if (this.staffData[0] && item.phone === this.staffData[0].phone) {
          repeat = true;
          alert("此员工已添加");
          return;
        }
      });
      if (repeat === false) {
        this.staffData.forEach(item => {
          this.selectedStaffList.push(item);
        });
        for (let i = 0; i < this.staffList.length; i++) {
          for (let j = 0; j < this.staffData.length; j++) {
            if (
              this.staffList[i] &&
              this.staffData[j] &&
              this.staffList[i].phone === this.staffData[j].phone
            ) {
              this.staffList.splice(i, 1);
            }
          }
        }
      }
    },
    // 右边表格选择项移到左边
    removeStaff() {
      setTimeout(() => {
        this.$refs["staffTable"].clearSelection();
        this.$refs["selectedStaffTable"].clearSelection();
      }, 0);
      this.selectedStaffData.forEach(item => {
        this.staffList.push(item);
      });
      for (let i = 0; i < this.selectedStaffList.length; i++) {
        for (let j = 0; j < this.selectedStaffData.length; j++) {
          if (
            this.selectedStaffList[i] &&
            this.selectedStaffData[j] &&
            this.selectedStaffList[i].phone === this.selectedStaffData[j].phone
          ) {
            this.selectedStaffList.splice(i, 1);
          }
        }
      }
    },
    // 将右边表格选择项存入selectedStaffData中
    handleSelectedStaffChange(rows) {
      this.selectedStaffData = [];
      if (rows) {
        rows.forEach(row => {
          if (row) {
            this.selectedStaffData.push(row);
          }
        });
      }
    },
    // 提交
    modifyStaff() {
      let isEmpty = false;
      this.selectedStaffList.forEach(item => {
        if (!item.staffTypeId) {
          alert("请选择类型");
          isEmpty = true;
          return;
        }
      });
      if (isEmpty === false) {
        editStaff(this.selectedStaffList, this.deviceQuery.id).then(res => {
          this.staffListVisible = false;
          this.$notify({
            title: "成功",
            message: "修改成功",
            type: "success",
            duration: 2000
          });
        });
      }
    }
}

多选表格：手动添加一个 el-table-column，设type属性为 selection 即可；当选择项发生变化时会触发 selection-change 事件，并将选择项作为参数传入。在这里，我们将左边表格的选择项缓存在staffData中，右边表格的选择项缓存在 selectedStaffData 中。

在移动选择项时，一是要将自身的该项删除，二是要将该项放入对方列表中（需要去重）。

关于分页功能可在左右两个表格分别添加，互不影响，具体可参考我之前的博客 https://www.cnblogs.com/zdd2017/p/11153527.html