微信小程序电商实战-商品列表流式布局

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：



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">
<p class="product-price-new">￥{{item.newprice}}</p>
<p class="product-price-old">￥{{item.oldprice}}</p>
<p class="discount">{{item.discount}}折</p>
</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">
<p class="product-price-new">￥{{item.newprice}}</p>
<p class="product-price-old">￥{{item.oldprice}}</p>
<p class="discount">{{item.discount}}折</p>
</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
c2cf
（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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