代码

List.vue

<template>
	<div class="row">
		<!-- 展示用户列表 -->
		<div v-show="info.users.length" class="card" v-for="user in info.users" :key="user.login">
			<a :href="user.html_url" target="_blank">
				<img :src="user.avatar_url" style='width: 100px'/>
			</a>
			<p class="card-text">{{user.login}}</p>
		</div>
		<!-- 展示欢迎词 -->
		<h1 v-show="info.isFirst">欢迎使用！</h1>
		<!-- 展示加载中 -->
		<h1 v-show="info.isLoading">加载中....</h1>
		<!-- 展示错误信息 -->
		<h1 v-show="info.errMsg">{{info.errMsg}}</h1>
	</div>
</template>

<script>
	export default {
		name:'List',
		data() {
			return {
				info:{
					isFirst:true,
					isLoading:false,
					errMsg:'',
					users:[]
				}
			}
		},
		mounted() {
			this.$bus.$on('updateListData',(dataObj)=>{
				this.info = {...this.info,...dataObj}
			})
		},
	}
</script>

<style scoped>
	.album {
		min-height: 50rem; /* Can be removed; just added for demo purposes */
		padding-top: 3rem;
		padding-bottom: 3rem;
		background-color: #f7f7f7;
	}

	.card {
		float: left;
		width: 33.333%;
		padding: .75rem;
		margin-bottom: 2rem;
		border: 1px solid #efefef;
		text-align: center;
	}

	.card > img {
		margin-bottom: .75rem;
		border-radius: 100px;
	}

	.card-text {
		font-size: 85%;
	}
</style>

Search.vue

<template>
	<section class="jumbotron">
		<h3 class="jumbotron-heading">Search Github Users</h3>
		<div>
			<input type="text" placeholder="enter the name you search" v-model="keyWord"/>&nbsp;
			<button @click="searchUsers">Search</button>
		</div>
	</section>
</template>

<script>
	export default {
		name:'Search',
		data() {
			return {
				keyWord:''
			}
		},
		methods: {
			searchUsers(){
				//请求前更新List的数据
				this.$bus.$emit('updateListData',{isLoading:true,errMsg:'',users:[],isFirst:false})
				this.$http.get(`https://api.github.com/search/users?q=${this.keyWord}`).then(
					response => {
						console.log('请求成功了')
						//请求成功后更新List的数据
						this.$bus.$emit('updateListData',{isLoading:false,errMsg:'',users:response.data.items})
					},
					error => {
						//请求后更新List的数据
						this.$bus.$emit('updateListData',{isLoading:false,errMsg:error.message,users:[]})
					}
				)
			}
		},
	}
</script>

App.vue

<template>
	<div class="container">
		<Search/>
		<List/>
	</div>
</template>

<script>
	import Search from './components/Search'
	import List from './components/List'
	export default {
		name:'App',
		components:{Search,List}
	}
</script>

main.js

//引入Vue
import Vue from 'vue'
//引入App
import App from './App.vue'
//引入插件
import vueResource from 'vue-resource'
//关闭Vue的生产提示
Vue.config.productionTip = false
//使用插件
Vue.use(vueResource)

//创建vm
new Vue({
	el:'#app',
	render: h => h(App),
	beforeCreate() {
		Vue.prototype.$bus = this
	},
})

运行