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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>
标签: vue.js 前端

本文转载自: https://blog.csdn.net/Tianxiaoxixi/article/details/129066578
版权归原作者 青田。 所有, 如有侵权,请联系我们删除。

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