vue中使用elementUI的全选表格，点击全选，选中子表格的checkbox

效果图如下：

由于elementUI提供的表格没办法满足需求，我就在elementUI表格的基础上又做了一些改动

首先，全选的checkbox不是表格自带的，是自己加上去的，子表格中的checkbox也是自己加的，所以全选和单选的方法都要自己手动写，代码如下：

<el-table
          class="father_table"
          size="mini"
          border
          ref="multipleTable"
          :data="tableData"
          tooltip-effect="highLight"
          style="width: 100%"
          :default-sort="{prop: 'date', order: 'descending'}"
          :span-method="arraySpanMethod"
          default-expand-all
        >
          <el-table-column width="55">
            <template slot="header">
              <input type="checkbox" v-model="isCheckedAll" :checked="isCheckedAll" @change="handle_allCheckbox" class="input_check" />
              <!-- <el-checkbox v-model="isCheckedAll" :checked="isCheckedAll"></el-checkbox> -->
            </template>
            <template>
              <el-table-column type="expand">
                <template slot-scope="props">
                  <el-table :ref="`childMultipleTable${props.$index}`" :show-header="showHeader" class="child_table" size="mini" :data="props.row.oldList">
                    <el-table-column width="48" class="checkbox_wrap">
                      <template slot-scope="checkProps">
                        <input
                          type="checkbox"
                          v-model="checkProps.row.isChecked"
                          :checked="checkProps.row.isChecked"
                          @change="handle_checkbox(checkProps.row)"
                          class="input_check"
                        />
                        <!-- <el-checkbox v-model="isCheckedAll" :checked="isCheckedAll"></el-checkbox> -->
                      </template>
                    </el-table-column>
                    <el-table-column prop="name"></el-table-column>
                    <el-table-column prop="address" show-overflow-tooltip></el-table-column>
                    <el-table-column prop="address" show-overflow-tooltip></el-table-column>
                    <el-table-column prop="address" show-overflow-tooltip></el-table-column>
                    <el-table-column prop="address" show-overflow-tooltip></el-table-column>
                    <el-table-column>
                      <template slot-scope="scope" v-if="checkedList.indexOf(scope.row.id) > -1">
                        <el-button size="mini" type="text" class="btnText_delete" @click="handle_delete(scope.row)">删除成员</el-button>
                      </template>
                    </el-table-column>
                  </el-table>
                </template>
              </el-table-column>
            </template>
          </el-table-column>
          <el-table-column>
            <template slot="header">姓名</template>
            <template slot-scope="scope">
              <span class="mr10">{{scope.row.name}}</span>
              <span>{{scope.row.address}}</span>
            </template>
          </el-table-column>
          <el-table-column show-overflow-tooltip>
            <template slot="header">年龄</template>
            <!-- <template slot-scope="scope">{{scope.row.address}}</template> -->
          </el-table-column>
          <el-table-column show-overflow-tooltip>
            <template slot="header">住址</template>
          </el-table-column>
          <el-table-column show-overflow-tooltip>
            <template slot="header">联系方式</template>
          </el-table-column>
          <el-table-column show-overflow-tooltip>
            <template slot="header">状态</template>
          </el-table-column>
          <el-table-column>
            <template slot="header">操作</template>
            <template slot-scope="scope">
              <el-button size="mini" type="text" class="btnText_add" @click="handle_add(scope.row)">添加成员</el-button>
            </template>
          </el-table-column>
        </el-table>
        <div class="page_wrapper">
          <p>显示第1条到第10条记录，总共{{pageTotal}}条记录</p>
          <el-pagination background layout="prev, pager, next" :total="pageTotal" prev-text="上一页" next-text="下一页"></el-pagination>
        </div>

watch: {
        isCheckedAll: {
            handler(newVal, oldVal) {
                if (newVal == true) {
                    this.tableData.forEach((item, i) => {
                        item.oldList.forEach((it) => {
                            this.$refs[`childMultipleTable${i}`].toggleRowSelection(it);
                        });
                    });
                } else if (newVal == false) {
                    this.tableData.forEach((item, i) => {
                        this.$refs[`childMultipleTable${i}`].clearSelection();
                    });
                }
            },
            deep: true,
            immediate: true,
        },
        dialogVisible: {
            handler(newVal, oldVal) {
                if (newVal == false) {
                    this.form.name = '';
                    this.form.age = '';
                    this.form.phone = '';
                    this.form.address = '';
                }
            },
            deep: true,
            immediate: true,
        },
    },

methods: {
　　　　　　
        arraySpanMethod({ row, column, rowIndex, columnIndex }) {
            if (columnIndex === 1) {
                return [1, 2];
            } else if (columnIndex === 2) {
                return [0, 0];
            }
        },
        // 全选
        handle_allCheckbox() {
            this.isCheckedAll = this.isCheckedAll ? true : this.isCheckedAll == null ? true : false;
            this.tableData.forEach((item, i) => {
                item.oldList.forEach((it) => {
                    it.isChecked = !it.isChecked;
                });
            });
            if (this.checkedList.length > 0) {
                this.checkedList = [];
            } else {
                this.tableData.forEach((item, i) => {
                    item.oldList.forEach((it) => {
                        if (it.isChecked) {
                            this.checkedList.push(it.id);
                        }
                    });
                });
            }
            console.log(this.checkedList, 'this.checkedList');
        },
        // 单选
        handle_checkbox(row) {
            let indexInchecked = this.checkedList.indexOf(row.id);
            if (indexInchecked > -1) {
                this.checkedList.splice(indexInchecked, 1);
            } else {
                this.checkedList.push(row.id);
            }
            console.log(this.checkedList, 'this.checkedList');
        },
        handle_delete(row) {},
        handle_add(row) {
            this.dialogVisible = true;
        },
        handle_submit() {
            console.log('submit');
        },
    },