uni-app 瀑布流

效果图

 一、组件文章来源地址https://www.toymoban.com/news/detail-511193.html

components/u-myWaterfall.vue

<template>
	<view class="u-waterfall">
		<view id="u-left-column" class="u-column"><slot name="left" :leftList="leftList"></slot></view>
		<view id="u-right-column" class="u-column"><slot name="right" :rightList="rightList"></slot></view>
	</view>
</template>
<script>
export default {
	props: {
		value: {
			// 瀑布流数据
			type: Array,
			required: true,
			default: function() {
				return [];
			}
		},
		// 每次向结构插入数据的时间间隔，间隔越长，越能保证两列高度相近，但是对用户体验越不好
		// 单位ms
		addTime: {
			type: [Number, String],
			default: 200
		},
		// id值，用于清除某一条数据时，根据此idKey名称找到并移除，如数据为{idx: 22, name: 'lisa'}
		// 那么该把idKey设置为idx
		idKey: {
			type: String,
			default: 'id'
		}
	},
	data() {
		return {
			leftList: [],
			rightList: [],
			tempList: [],
		}
	},
	watch: {
		copyFlowList(nVal, oVal) {
			// 取差值，即这一次数组变化新增的部分
			let startIndex = Array.isArray(oVal) && oVal.length > 0 ? oVal.length : 0;
			// 拼接上原有数据
			this.tempList = this.tempList.concat(this.cloneData(nVal.slice(startIndex)));
			this.splitData();
		}
	},
	mounted() {
		this.tempList = this.cloneData(this.copyFlowList);
		this.splitData();
	},
	computed: {
		// 破坏flowList变量的引用，否则watch的结果新旧值是一样的
		copyFlowList() {
			return this.cloneData(this.value);
		}
	},
	methods: {
		async splitData() {
			if (!this.tempList.length) return;
			let leftRect = await this.$uGetRect('#u-left-column');
			let rightRect = await this.$uGetRect('#u-right-column');
			// 如果左边小于或等于右边，就添加到左边，否则添加到右边
			let item = this.tempList[0];
			// 解决多次快速上拉后，可能数据会乱的问题，因为经过上面的两个await节点查询阻塞一定时间，加上后面的定时器干扰
			// 数组可能变成[]，导致此item值可能为undefined
			if(!item) return ;
			if (leftRect.height < rightRect.height) {
				this.leftList.push(item);
			} else if (leftRect.height > rightRect.height) {
				this.rightList.push(item);
			} else {
				// 这里是为了保证第一和第二张添加时，左右都能有内容
				// 因为添加第一张，实际队列的高度可能还是0，这时需要根据队列元素长度判断下一个该放哪边
				if (this.leftList.length <= this.rightList.length) {
					this.leftList.push(item);
				} else {
					this.rightList.push(item);
				}
			}
			// 移除临时列表的第一项
			this.tempList.splice(0, 1);
			// 如果临时数组还有数据，继续循环
			if (this.tempList.length) {
				setTimeout(() => {
					this.splitData();
				}, this.addTime)
			}
		},
		// 复制而不是引用对象和数组
		cloneData(data) {
			return JSON.parse(JSON.stringify(data));
		}
	}
}
</script>

<style lang="scss" scoped>

.u-waterfall {
	display: flex;
	flex-direction: row;
	align-items: flex-start;
}

.u-column {
	display: flex;
	flex: 1;
	flex-direction: column;
	height: auto;
}

.u-image {
	width: 100%;
}
</style>

二、商品的组件

<template>
	<view>
		<view class="waterfall-box" v-for="(item, index) in list" :key="index">
			<u-image :src="item.image" :lazy-load="true" radius="10" width="160" height="160"></u-image>
			<view class="box-item-title">
				{{item.title}}
			</view>
			<view class="box-item-price">
				{{item.price}}元
			</view>
			<view class="box-item-tag">
				<view class="tag-owner">
					自营
				</view>
				<view class="tag-text">
					放心购
				</view>
			</view>
			<view class="box-comment">
				{{item.shop}}
			</view>
		</view>
	</view>
</template>

<script>
	export default {
		name:"MyGoodsDemo",
		props:{
			list:{
				type:Array,
				default:[]
			}
		},
		data() {
			return {
				
			};
		}
	}
</script>

<style lang="scss">
.waterfall-box {
			border-radius: 16rpx;
			margin: 10rpx;
			background-color: #ffffff;
			padding: 16rpx;
			position: relative;
			.box-item-title{
				width: 320rpx;
				font-size: 26rpx;
				margin-top: 10rpx;
				color: #434343;
				text-overflow: -o-ellipsis-lastline;
				overflow: hidden;				
				text-overflow: ellipsis;		
				display: -webkit-box;			
				-webkit-line-clamp: 2;			
				line-clamp: 2;					
				-webkit-box-orient: vertical;	
			}
			.box-item-price{
				font-size: 30rpx;
				color:#ff4142;
				margin-top: 10rpx;
			}
			.box-item-tag{
				display: flex;
				margin-top: 10rpx;
				.tag-owner{
					background-color:#FF4142;
					color: #FFFFFF;
					display: flex;
					align-items: center;
					padding: 4rpx 14rpx;
					border-radius: 50rpx;
					font-size: 16rpx;
					line-height: 1;
				}
				.tag-text {
					border: 1px solid #FF4142;
					color: #FF4142;
					margin-left: 20rpx;
					border-radius: 50rpx;
					line-height: 1;
					padding: 4rpx 14rpx;
					display: flex;
					align-items: center;
					font-size: 20rpx;
				}
			}
			.box-comment{
				font-size: 22rpx;
				color: $u-tips-color;
				margin-top: 5px;
			}
		}
</style>

三、页面的使用

<template>
	<view class="my-waterfall">
		<myWaterfall v-model="flowList">
			<template v-slot:left="{leftList}">
				<MyGoodsDemo :list="leftList"></MyGoodsDemo>
			</template>
			<template v-slot:right="{rightList}">
				<MyGoodsDemo :list="rightList"></MyGoodsDemo>
			</template>
		</myWaterfall>
		<!-- 加载更多 -->
		<u-loadmore bg-color="rgb(240, 240, 240)" :status="loadStatus" @loadmore="addRandomData"></u-loadmore>
	</view>
</template>

<script>
	import myWaterfall from '@/components/u-myWaterfall.vue'
	import MyGoodsDemo from '@/components/MyGoodsDemo.vue'
	export default {
		components:{
			myWaterfall,
			MyGoodsDemo
		},
		data() {
			return {
				loadStatus: 'loadmore',
				flowList: [],
				list: [
					{
						price: 35,
						title: 'CINESSD 小白男鞋2022新款冬季运动休闲板鞋男士皮面防水低帮百 白兰 39',
						shop: '500+条评论',
						image: 'https://img14.360buyimg.com/mobilecms/s360x360_jfs/t1/43390/15/19929/131606/6370b921Eefed6acc/8e9780a1736357e6.jpg!q70.dpg.webp',
					},
					{
						price: 75,
						title: '海天 调味组合酱油蚝油料酒金标生抽*2+蚝油+古道料酒省心礼盒锦鲤派',
						shop: '500+条评论',
						image: 'https://img14.360buyimg.com/mobilecms/s360x360_jfs/t1/208109/6/29643/155027/63ec3d92F817bd559/90a96c4dd880e40f.jpg!q70.dpg.webp',
					},
					{
						price: 385,
						title: '闪魔 苹果14手机壳 iphone14ProMax气囊防摔超薄保护套镜头全包透明软壳 苹果14Pro【十米防摔^透出裸机】全透明',
						shop: '500+条评论',
						image: 'https://img14.360buyimg.com/mobilecms/s360x360_jfs/t1/5972/32/17361/80842/626deb75E66225786/e7f1ff06504a1cca.jpg!q70.dpg.webp',
					},
					{
						price: 784,
						title: '小米Redmi Buds3青春版 真无线蓝牙耳机 入耳式耳机 蓝牙耳机 小米无线耳机 蓝牙5.2 苹果华为手机通用',
						shop: '500+条评论',
						image: 'https://img14.360buyimg.com/mobilecms/s360x360_jfs/t1/97453/11/35123/120822/63eb4ec8F554a9a71/5c0332fa1b04d502.jpg!q70.dpg.webp',
					},
					{
						price: 7891,
						title: '海尔（Haier）大容量囤货海尔（Haier）冰箱京东小家双开门冰箱532升电冰箱一级变频大超薄家用冰箱风冷无霜 BCD-532WGHSS8EL9U1',
						shop: '500+条评论',
						image: 'https://img14.360buyimg.com/mobilecms/s360x360_jfs/t1/97453/11/35123/120822/63eb4ec8F554a9a71/5c0332fa1b04d502.jpg!q70.dpg.webp',
					},
					{
						price: 2341,
						title: '卫龙魔芋爽辣条休闲零食香辣素毛肚180g/袋约12小包即食小零食',
						shop: '500+条评论',
						image: 'https://img14.360buyimg.com/mobilecms/s360x360_jfs/t1/97453/11/35123/120822/63eb4ec8F554a9a71/5c0332fa1b04d502.jpg!q70.dpg.webp',
					},
					{
						price: 661,
						shop: '500+条评论',
						title: '卫龙魔芋爽辣条休闲零食香辣素毛肚180g/袋约12小包即食小零食',
						image: 'https://img13.360buyimg.com/n2/s370x370_jfs/t1/51330/4/17889/64744/63ca2564F4cfd8ce3/a9ed18603e2855f8.jpg!q70.jpg.webp',
					},
					{
						price: 1654,
						title: '鞋子鞋子鞋子',
						shop: '500+条评论',
						image: 'https://img10.360buyimg.com/n2/s370x370_jfs/t1/195846/4/32797/40099/63e348fbF14993564/472de8ed0c40f206.jpg!q70.jpg',
					},
					{
						price: 1678,
						title: '优资莱（UZERO） 优资莱绿茶保湿礼盒洁面乳爽肤水乳液精华套装补水护肤品女 八件套礼盒',
						shop: '500+条评论',
						image: 'https://img14.360buyimg.com/mobilecms/s360x360_jfs/t1/200469/24/30778/90107/63989b02E6f47594f/cb91265ba594e7cb.jpg!q70.dpg.webp',
					},
					{
						price: 924,
						title: '兰蔻小黑瓶50ml 修护保湿',
						shop: '500+条评论',
						image: 'https://img14.360buyimg.com/mobilecms/s360x360_jfs/t1/160110/20/21070/176153/63eb2b42F599b4cb6/f466a798d5f63d83.jpg!q70.dpg.webp',
					},
					{
						price: 8243,
						title: '至本特安修护套装  2件套（肌底液+乳液）',
						shop: '500+条评论',
						image: 'https://img14.360buyimg.com/mobilecms/s360x360_jfs/t1/54121/6/21408/129268/631593a7E87b6d12a/b3c650bf886c6a5f.jpg!q70.dpg.webp',
					},
				]
			}
		},
		onLoad() {
			this.addRandomData();
		},
		onReachBottom() {
			this.loadStatus = 'loading';
			// 模拟数据加载
			setTimeout(() => {
				this.addRandomData();
				this.loadStatus = 'loadmore';
			}, 1000)
		},
		methods: {
			addRandomData() {
				for(let i = 0; i < 10; i++) {
					let index = this.$u.random(0, this.list.length - 1);
					// 先转成字符串再转成对象，避免数组对象引用导致数据混乱
					let item = JSON.parse(JSON.stringify(this.list[index]))
					console.log(item);
					item.id = this.$u.guid();
					this.flowList.push(item);
				}
			},
		}
	}
</script>

<style>
page {
	background-color: rgb(240, 240, 240);
}
</style>
<style lang="scss" scoped>
	.my-waterfall{
		width: 750rpx;
		.waterfall-box {
			border-radius: 16rpx;
			margin: 10rpx;
			background-color: #ffffff;
			padding: 16rpx;
			position: relative;
			.box-item-title{
				width: 320rpx;
				font-size: 26rpx;
				margin-top: 10rpx;
				color: #434343;
				text-overflow: -o-ellipsis-lastline;
				overflow: hidden;				
				text-overflow: ellipsis;		
				display: -webkit-box;			
				-webkit-line-clamp: 2;			
				line-clamp: 2;					
				-webkit-box-orient: vertical;	
			}
			.box-item-price{
				font-size: 30rpx;
				color:#ff4142;
				margin-top: 10rpx;
			}
			.box-item-tag{
				display: flex;
				margin-top: 10rpx;
				.tag-owner{
					background-color:#FF4142;
					color: #FFFFFF;
					display: flex;
					align-items: center;
					padding: 4rpx 14rpx;
					border-radius: 50rpx;
					font-size: 16rpx;
					line-height: 1;
				}
				.tag-text {
					border: 1px solid #FF4142;
					color: #FF4142;
					margin-left: 20rpx;
					border-radius: 50rpx;
					line-height: 1;
					padding: 4rpx 14rpx;
					display: flex;
					align-items: center;
					font-size: 20rpx;
				}
			}
			.box-comment{
				font-size: 22rpx;
				color: $u-tips-color;
				margin-top: 5px;
			}
		}
		
	}
</style>

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