uni-app案例学习【2】组件的使用（数据+事件）

资讯详情部分作为一个组件

1.封装为组件

创建news-item.vue

<template>
	<view>
		<view class="news_item" v-for="item in data" :key="item.id">
			<image :src="item.img_url"></image>
			<view class="content">
				<view class="tit">{{item.title}}</view>
				<view class="info">
					<text>发表时间：{{item.add_time | formatDate}}</text>
					<text>浏览：{{item.click+123}}次</text>
				</view>
			</view>
		</view>
	</view>
</template>

<script>
	export default {
		props: ['data'],
		filters:{
		  formatDate(data){
				const date = new Date(data)
				console.log(date)
				const day = date.getMonth().toString().padStart(2,'0')+'-'+date.getDay().toString().padStart(2,'0')
				return date.getFullYear()+'-'+day
			}	
		}
	}
</script>

<style lang="scss">
	.news_item{
		display: flex;
		padding: 5px 10px;
		border-bottom: 1rpx solid $shop-color;
		image{
			max-width: 200rpx;
			min-width: 200rpx;
			height: 150rpx;
		}
		.content {
			padding: 5px 10px;
			position: relative;
			.tit{
				font-size: 30rpx;
			}
			.info{
				font-size: 26rpx;
				position: absolute;
				left: 10px;
				bottom: 5px;
				text:nth-child(2){
					margin-left: 20px;
				}
			}
		}
	}
</style>

2.在新闻页面导入并使用

<template>
	<view class="news">
		<new-item :data="newsList"></new-item>
	</view>
</template>
<script>
	import newItem from '../../components/new-item/new-item.vue'
	export default {
		data() {
			return {
				newsList: []
			}
		},
		methods: {
			async getNewsList () {
				const res = await this.$myRequest({
					url:'/api/getnewslist'
				})
				this.newsList = res.data.message
			}
		},
		onLoad () {
			this.getNewsList()
		},
		components: {
			"new-item":newItem
		}
	}
</script>

<style lang="scss">
</style>

3.点击列表进入详情

• 点击子组件列表项通过this.$emit触发父组件的方法

   navigatorTo (item) {
    this.$emit('clickItem',item)
  }
  

• 父组件通过注册clickItem事件及事件函数实现跳转操作

  <template>
  	<view class="news">
  		<new-item :data="newsList" @clickItem="goDetail"></new-item>
  	</view>
  </template>
  <script>
  	export default {
  		methods: {
  			goDetail (data) {
  				console.log(data)
  				uni.navigateTo({
  					url: '/pages/news-detail/news-detail'
  				})
  			}
  		}
  	}
  </script>
  

• 新建/pages/news-detail/news-detail页面