小程序怎么制作商品列表流式布局

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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：

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

          {{item.name}}              
￥{{item.newprice}}
                
￥{{item.oldprice}}
                
{{item.discount}}折
                         {{item.name}}              
￥{{item.newprice}}
                
￥{{item.oldprice}}
                
{{item.discount}}折
                      

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;}

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