Vue父组件与子组件传递事件/调用事件

父组件:

<template>
<div>
<div @click="openChild">弹弹弹,弹出子组件</div>
<childs ref="alert" @watchChild="parentReceive"></childs> <!--监听子组件绑定的方法-->
</div>
</template>

<script>
import childs from '../components/modal/Alert'
export default{
data(){
return {
msg: '我是父组件的msg!!!'
}
},
components:{
childs
},
methods:{
parentReceive(message){
alert(message);
},
openChild(){
this.$refs.alert.open('我是子组件','子组件内容!!!!!');
}
}
}
</script>

<style>
</style>
子组件:

<template>
<modal :show='show' ref="modal">
<div slot="title">{{title}}</div>
<div slot="content">{{content}}</div>
<div slot="buttons" class="modal-buttons">
<span class="modal-button" @click="_onClick()">确定</span>
</div>
</modal>
</template>

<script>
import Modal from './Modal'

export default {
props: {
show: {
type: Boolean,
default: false
},
okText: {
type: String,
default: '确定'
},
},
data(){
return {
title: '',
content: ''
}
},
components: {
Modal
},
methods: {
open (title, content) {
this.title = title
this.content = content
this.$refs.modal.open()
},
close () {
this.title = ''
this.content = ''
this.$refs.modal.close()
},
_onClick(){
this.close();
this.$emit('watchChild','我是从子组件传过来的内容!!!');    //触发$emit绑定的watchChild方法
}
}
}
</script>
第一种方法:

如上:通过this.$emit()来触发父组件的方法。具体就是子组件触发$emit绑定的事件watchChild,然后父组件监听watchChild,一旦watchChild被触发便会触发父组件的parentReceive方法。

父组件:

<template>
<div>
<div @click="openChild">弹弹弹,弹出子组件</div>
<childs ref="alert" :on-ok="parentReceive"></childs> <!--把父组件的方法名传给子组件的onOK属性-->
</div>
</template>

<script>
import childs from '../components/modal/Alert'
export default{
data(){
return {
msg: '我是父组件的msg!!!'
}
},
components:{
childs
},
methods:{
parentReceive(message){
alert(message);
},
openChild(){
this.$refs.alert.open('我是子组件','子组件内容!!!!!');
}
}
}
</script>

<style>
</style>
子组件:

<template>
<modal :show='show' ref="modal">
<div slot="title">{{title}}</div>
<div slot="content">{{content}}</div>
<div slot="buttons" class="modal-buttons">
<span class="modal-button" @click="_onClick()">确定</span>
</div>
</modal>
</template>

<script>
import Modal from './Modal'

export default {
props: {
show: {
type: Boolean,
default: false
},
okText: {
type: String,
default: '确定'
},
onOk: {    //定义onOK属性
type: Function
}
},
data(){
return {
title: '',
content: ''
}
},
components: {
Modal
},
methods: {
open (title, content) {
this.title = title
this.content = content
this.$refs.modal.open()
},
close () {
this.title = ''
this.content = ''
this.$refs.modal.close()
},
_onClick(){
this.close();
if(this.onOk){
this.onOk('我是子组件传递过来的数据!!!!');
}
}
}
}
</script>
第二种方法:

在子组件props中定义属性onOK,类型为function,然后在父组件中把要触发的方法名传递给onOK属性,最后在子组件中判断onOk是否存在,是的话直接执行这个方法。

效果:


---------------------
作者:yemuxia_sinian
来源:CSDN
原文:https://blog.csdn.net/yemuxia_sinian/article/details/80534296
版权声明:本文为博主原创文章,转载请附上博文链接!

原文地址:https://www.cnblogs.com/shaozhu520/p/10729477.html