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子组件使用this.$emit()向父组件传值
首先必须在父组件中引用子组件，然后实现传值
第一步 在父组件中引入子组件
使用import引入组件
import indexImportOrder from './components/indexImportOrder'
声明
//定义组件 components:{ indexImportOrder, },
使用
第二步 子组件向父组件传值
* 在子组件中需要向父组件传值处使用
this.$emit("function",param); //其中function为父组件定义函数，param为需要传递参数
//新订单页面跳转 viewBusiness(){ let flag = false; this.$emit('closeMain',flag); },
*
在父组件中子组件引用处添加函数：
v-on:function=“function1”；
//其中function为子组件中定义函数（closeMain），function1为父组件定义函数–用于接收子组件传值并进行相应数据处理，可定义为同一名称
v-on： 可用 @ 代替 @function=“function1” ，@ 为 v-on：的简写
<indexImportOrder ref="indexImportOrder" @closeMain="handleClose"/>
val及为子组件中flag，即接收的子组件参数
handleClose(val){ this.flag = val; },
3、子组件接收父组件传过来的值 用props
