layer.open 方法中获取到子页面的 vue 对象

父页面中打开子页面

handleAddLinkCar: function () {
    
    
      const vm = this;
      layer.open({
    
    
        type: 2,
        title: "添加车辆",
        shadeClose: false,
        shade: [0.2, "#393D49"],
        maxmin: true, //开启最大化最小化按钮
        area: ["1200px", "750px"],
        content: "/btdzy/storehouse/tzcarsearch", //iframe的url，no代表不显示滚动条
        btn: ["确定", "关闭"],
        yes: function (index, layero) {
    
    
          // 确定按钮回调
          let form = layero.find("iframe").contents().find("#tzcarSearch")[0]["__vue__"];
          let tzCars = [];
          tzCars = form.$refs.multipleTable.selection;
          // 添加到该仓库下
          let storehouseId;
          if (vm.form.storehouseId == undefined) {
    
    
            storehouseId = vm.childrenStorehouseId;
          } else {
    
    
            storehouseId = vm.form.storehouseId;
          }
          addLinkTzCar(tzCars, storehouseId).then((response) => {
    
    
            if (response.code == 200) {
    
    
              vm.msgSuccess("添加成功");
              layer.close(index);
              vm.$emit("getLinkCarList", storehouseId);
            }
          });
        },
        cancel: function (index, layero) {
    
    
          // 取消按钮回调
          layer.close(index);
        },
      });
    },

子页面

<template>
  <div id="tzcarSearch" class="app-container">
    <!-- 查询条件 -->
    <el-row>
      <el-form
        label-width="105px"
        size="mini"
        label-position="left"
        :model="queryParams"
        ref="queryForm"
        width="100%"
        style="padding: 10px; background-color: #eee"
      >
        <el-row>
         	...
        </el-row>
      </el-row>
    </div>

    <pagination
      v-show="total > 0"
      :total="total"
      :page.sync="queryParams.pageNum"
      :limit.sync="queryParams.pageSize"
      @pagination="getList"
    />
  </div>
</template>

主要是这两句：

let form = layero.find("iframe").contents().find("#tzcarSearch")[0]["__vue__"];

<div id="tzcarSearch" class="app-container">