v-for 循环中，子组件向父组件传值

• 父组件中调用子组件，将 index传入

  <!-- 调用公共分割头部插件 -->
      <commonDividerHead ref="head" :index="index" :dividerHeadInfo="item" @showChange="showChange"></commonDividerHead>

• 子组件传值

var showChange = { show: this.show, index: this.index };
this.$emit("showChange", showChange);

• 父组件接收

 showChange(showChange) {
      //  console.log("showChange:",showChange);
      this.dividerHeadInfos[showChange.index].show = showChange.show;
    }

 data() {
    return {
      dividerHeadInfos: [
        {
          isShow: true, //是否显示
          show: true, //展开
          title: "用地审批", //名称
          message: "面积/千米", //信息
          buttons: [
            //按钮组
            {
              title: "保存",
              click: "this.$parent.say4()", //调用父类方法 （this.$parent.你的方法）
              type: "primary" //组件样式，查看element中Butten样式,如果有特殊样式需求，请提出
            },
            {
              title: "取消",
              click: "this.$parent.say5()",
              type: "warning"
            }
          ]
        },
        {
          isShow: true, //是否显示
          show: true, //展开
          title: "用地审批2",
          message: "面积/千米2",
          buttons: [
            {
              title: "保存2",
              click: "this.$parent.say4()",
              type: "primary"
            },
            {
              title: "取消2",
              click: "this.$parent.say5()",
              type: "warning"
            }
          ]
        }
      ]
    };