源
<div id="example">
<parent-component></parent-component>
</div>
<template id="parent-component">
<div class="parent">
<h3>我是父组件</h3>
<button @click="getData">获取子组件数据</button>
<br>
<div v-html="msg"></div>
<child-component1></child-component1>
<child-component2></child-component2>
</div>
</template>
<template id="child-component1">
<div class="child">
<h3>我是子组件1</h3>
<input v-model="msg">
<p>{{msg}}</p>
</div>
</template>
<template id="child-component2">
<div class="child">
<h3>我是子组件2</h3>
<input v-model="msg">
<p>{{msg}}</p>
</div>
</template>
<script>
// 注册
Vue.component('parent-component', {
template: '#parent-component',
data(){
return{
msg:'',
}
},
methods:{
getData(){
let html = '';
let children = this.$children;
for(var i = 0; i < children.length;i++){
html+= '<div>' + children[i].msg + '</div>';
}
this.msg = html;
}
},
components:{
'child-component1':{
template:'#child-component1',
data(){
return{
msg:'',
}
},
},
'child-component2':{
template:'#child-component2',
data(){
return{
msg:'',
}
},
},
}
})
// 创建根实例
new Vue({
el: '#example',
})
</script>
<iframe style="width: 100%; height: 400px;" src="http://owbhsauev.bkt.clouddn.com/vue/module/m21.html" frameborder="0" width="320" height="240">
$refs
组件个数较多时,难以记住各个组件的顺序和位置,通过序号访问子组件不是很方便
在子组件上使用ref属性,可以给子组件指定一个索引ID:
<child-component1 ref="c1"></child-component1>
<child-component2 ref="c2"></child-component2>
在父组件中,则通过$refs.索引ID
访问子组件的实例
this.$refs.c1
this.$refs.c2
<div id="example">
<parent-component></parent-component>
</div>
<template id="parent-component">
<div class="parent">
<h3>我是父组件</h3>
<div>
<button @click="getData1">获取子组件c1的数据</button>
<p>{{msg1}}</p>
</div>
<div>
<button @click="getData2">获取子组件c2的数据</button>
<p>{{msg2}}</p>
</div>
<child-component1 ref="c1"></child-component1>
<child-component2 ref="c2"></child-component2>
</div>
</template>
<template id="child-component1">
<div class="child">
<h3>我是子组件1</h3>
<input v-model="msg">
<p>{{msg}}</p>
</div>
</template>
<template id="child-component2">
<div class="child">
<h3>我是子组件2</h3>
<input v-model="msg">
<p>{{msg}}</p>
</div>
</template>
<script>
// 注册
Vue.component('parent-component'