uni-app 瀑布流

效果图

 一、组件

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msaddTime: {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idxidKey: {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undefinedif(!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>