Vue2.x中的父组件传递数据至子组件的方法

<template>
 <div>
 <v-girl-group 
  :girls="aGirls"></v-girl-group>
 </div>
</template>

<script>
import vGirlGroup from './GirlGroup'
export default {
 name: 'girl',
 components: {
 vGirlGroup
 },
 data () {
 return {
  aGirls:[{
  name:'小丽',
  age:22
  },{
  name:'小美',
  age:21
  },{
  name:'小荷',
  age:24
  }]
 }
 }
}
</script>

<template>
 <div>
 <ul>
  <li v-for="(value, index) in girls">{{ index }} - {{ value.name }} - {{ value.age }}</li>
 </ul>
 </div>
</template>

<script>
export default {
 name: 'girl-group',
 props: {
 girls: {
  type: Array,
  required: true
 }
 }
}
</script>