微信小程序电商实战-商品列表流式布局

傷城~ 2022-06-01 10:18 919阅读 0赞

IT实战联盟博客：[http://blog.100boot.cn][http_blog.100boot.cn]

今天给大家分享一下微信小程序中商品列表的流式布局方式，根据文章内容操作就可以看到效果哦~~~  
\#\#\#\#流式布局概念

流式布局也叫百分比布局
    把元素的宽,高,margin,padding不再用固定数值,改用百分比,
    这样元素的宽,高,margin,padding会根据页面的尺寸随时
    调整已达到适应当前页面的目的.

先看效果：  
![商品列表流式布局.gif][.gif]

如上图所示，为了能够看的更直观一点我给布局设置了红色虚线边框，整体页面根据元素的百分比进行布局。  
直接看代码：  
\#\#\#\#xxx.wxml

<scroll-view scroll-y="true" style="height:{
 {scrollH}}px" bindscrolltolower="loadImages">
 <view class="goods" style="width:100%">
 <view class="mg_item">
 <view wx:for="{
 {col1}}" wx:key="id">
 <view class="item_info">
 <image src="{
 {item.imageurl}}" style="width:100%;height:{
 {item.height}}px"></image>
 </view>
 <view class="product-name">
 {
 {item.name}}
 </view>
 <view class="product-price-wrap">
 ￥{
 {item.newprice}} 
 ￥{
 {item.oldprice}} 
 {
 {item.discount}}折 
 </view>
 </view>
 </view>
 <view class="mg_item">
 <view wx:for="{
 {col2}}" wx:key="id">
 <view class="item_info">
 <image src="{
 {item.imageurl}}" style="width:100%;height:{
 {item.height}}px"></image>
 </view>
 <view class="product-name">
 {
 {item.name}}
 </view>
 <view class="product-price-wrap">
 ￥{
 {item.newprice}} 
 ￥{
 {item.oldprice}} 
 {
 {item.discount}}折 
 </view>
 </view>
 </view>
 </view>
 </scroll-view>
 <view style="display:none">
 <image wx:for="{
 {images}}" wx:key="id" id="{
 {item.id}}" src="{
 {item.imageurl}}" bindload="onImageLoad"></image>
 </view>

通过查看class标签发现有两个**img\_item** ，所以采取的是左右分别加载数据方式。

\#\#\#\#xxx.js

Page({
 
 data: {
 scrollH: 0,
 imgWidth: 0,
 loadingCount: 0,
 images: [],
 col1: [],
 col2: []
 },
 
 onLoad: function () {
 wx.getSystemInfo({
 success: (res) => {
 let ww = res.windowWidth;
 let wh = res.windowHeight;
 let imgWidth = ww * 0.48;
 let scrollH = wh;
 
 this.setData({
 scrollH: scrollH,
 imgWidth: imgWidth
 });
 
 //加载首组图片
 this.loadImages();
 }
 })
 },
 
 onImageLoad: function (e) {
 let imageId = e.currentTarget.id;
 let oImgW = e.detail.width; //图片原始宽度
 let oImgH = e.detail.height; //图片原始高度
 let imgWidth = this.data.imgWidth; //图片设置的宽度
 let scale = imgWidth / oImgW; //比例计算
 let imgHeight = oImgH * scale; //自适应高度
 
 let images = this.data.images;
 let imageObj = null;
 
 for (let i = 0; i < images.length; i++) {
 let img = images[i];
 if (img.id === imageId) {
 imageObj = img;
 break;
 }
 }
 
 imageObj.height = imgHeight;
 
 let loadingCount = this.data.loadingCount - 1;
 let col1 = this.data.col1;
 let col2 = this.data.col2;
 
 //判断当前图片添加到左列还是右列
 if (col1.length <= col2.length) {
 col1.push(imageObj);
 } else {
 col2.push(imageObj);
 }
 
 let data = {
 loadingCount: loadingCount,
 col1: col1,
 col2: col2
 };
 
 //当前这组图片已加载完毕，则清空图片临时加载区域的内容
 if (!loadingCount) {
 data.images = [];
 }
 
 this.setData(data);
 },
 
 loadImages: function () {
 let images = [
 {
 goodId: 0,
 name: '泊尔崖蜜蜜光面膜（5片盒装）',
 url: 'bill',
 imageurl: 'https://a3.vimage1.com/upload/merchandise/pdcvis/2017/08/21/142/fb2960bf8e074d029c24315279289c19-5_218x274_70.jpg',
 newprice: "86",
 oldprice: "88",
 discount: "8.8",
 height: 0, 
 },
 {
 goodId: 1,
 name: '透无瑕矿物养护两用粉饼#03',
 url: 'bill',
 imageurl: 'https://a.appsimg.com/upload/brand/upcb/2017/10/26/77/ias_150899004322921_604x290_80.jpg!75.webp',
 newprice: "147.00",
 oldprice: "150.00",
 discount: "8.8",
 height: 0,
 },
 {
 goodId: 2,
 name: '川水水光面膜（5片盒装）',
 url: 'bill',
 imageurl: 'https://a2.vimage1.com/upload/merchandise/pdcvis/2017/08/21/86/7891361fdab348a1bc91aeca31fc77b1-5_218x274_70.jpg',
 newprice: "86.00",
 oldprice: "88.00",
 discount: "8.8",
 height: 0, 
 },
 {
 goodId: 3,
 name: '蜜三色渐变咬唇膏3.2g 03蜜橙动心恋',
 url: 'bill',
 imageurl: 'http://a3.vimage1.com/upload/merchandise/pdcvis/2017/08/21/176/c3b9453a4d7f46c6a8fe78705f77352b-5_218x274_70.jpg',
 newprice: "97.00",
 oldprice: "99.00",
 discount: "8.8",
 height: 0,
 },
 {
 goodId: 4,
 name: '时焕颜亮采套装',
 url: 'bill',
 imageurl: 'https://a2.vimage1.com/upload/merchandise/pdcvis/2017/08/21/93/69a6bc1c11eb4be184b7dffb43b8565b-5_218x274_70.jpg',
 newprice: "398.00",
 oldprice: "459.00",
 discount: "8.8",
 height: 0,
 }
 ];
 
 let baseId = "img-" + (+new Date());
 
 for (let i = 0; i < images.length; i++) {
 images[i].id = baseId + "-" + i;
 }
 
 this.setData({
 loadingCount: images.length,
 images: images
 });
 }
 
 })

如下代码： 
**if (col1.length <= col2.length) \{ 
col1.push(imageObj); 
\} else \{ 
col2.push(imageObj); 
\}** 
检索商品集合根据高度分别放入两个集合中。 
\#\#\#\#xxx.wxss

page{  
      height: 100%;  
      background-color: #F3F4F6;
    } 
    /* 单个图片容器的样式 */
    .img_item {
      width: 48.5%;
      margin: 2px;
      display: inline-block;
      vertical-align: top;
      background-color: #ffffff;
      font-size: 24rpx;
    
    }
    .item_info{
      border-top:1px dashed red;
    }
    .product-name{
      color: #000;
      /* height: 28px; */
      text-align:left;
       margin: 0px 5px; 
       margin-bottom: 5px; 
    }
    .product-price-wrap .product-price-new{
      color: #e80080;
      margin-left:5px;
      font-weight:900;
    }
    .product-price-wrap .product-price-old{
      color: #888;
      text-decoration: line-through;
      padding-left: 2px;
    }
    .product-price-wrap .discount{
      margin-left: 30px;
      background-color: #000;
      color: #fff;
    }

好了，商品列表流式布局方式 代码示例已经讲完了，赶紧尝试一下吧！

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[.gif]: /images/20220601/900c9b738a64428e913cc1b8376f1528.png