父组件: app.vue

子组件: header.vue

子组件:

<template>
	<div>
		<!--
			logo 是在data中(父组件)定义的变量
			如果需要从父组件中获取logo的值,就需要使用props['logo'], 如30行
			在props中添加了元素以后,就不需要在data中(子组件)中再添加变量了
		-->
		<div id='logo'>{{logo}}(我是父组件传递过来的值)</div>
		<ul class="nav">
			<li v-for="nav in navs">{{nav.li}}</li>
		</ul>		
	</div>

</template>
<script>
	export default{
		name:'headerDiv',
		data(){
			return{
				navs:[
					{li:'主页'},
					{li:'日志'},
					{li:'说说'},
					{li:'主页'},
					{li:'相册'}
				]
			}
		},
		props:['logo']
	}
	
</script>
<style scoped>
	.nav li{list-style: none;} 
</style>

<template>
  <div id="app">
    <img src="./assets/logo.png">
    <!--
    	在调用组件的时候,使用v-bind将logo的值绑定为 APP.vue中定义的变量 logoMsg
    	然后就能将App.vue中的logoMsg的值传给header.vue 了
    -->
    <headerDiv :logo="logoMsg"></headerDiv>
    <h1>{{msg}}</h1>
    <firstcomponent></firstcomponent>

    <router-view></router-view>
  </div>
</template>

<script>
import firstcomponent from './components/firstcomponent.vue'
import headerDiv from './components/header.vue'
export default {
  name: 'app',
  data(){
  	return{
  		msg:'hellow Vue',
  		logoMsg:'WiseWrong'
  	}
  },
  components:{firstcomponent,headerDiv},
}
</script>

<style>
#app {
  font-family: 'Avenir', Helvetica, Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-align: center;
  color: #2c3e50;
  margin-top: 60px;
}
</style>