前言

商品价格是商品价值的货币表现形态。在商品经济条件下，商品的价值是由生产这种商品所耗费的社会必要劳动时间决定的，但社会必要劳动时间又无法直接表示商品价值，而只能间接地和相对地表现在某种商品同另一种商品交换的比例上。

价格分为出厂价、经销价、市场价、需求价；对于一些特殊品种的价格，如小麦等农产品，有产区收购价、产区出库价等，均以出厂价对待，各个粮食批发市场的价格以市场价对待。

vant-weapp的Layout布局api

Row Props

Col Props

外部样式类

基础使用：
Layout 组件提供了24列栅格，通过在Col上添加span属性设置列所占的宽度百分比。此外，添加offset属性可以设置列的偏移宽度，计算方式与 span 相同。

<van-row>
  <van-col span="8">span: 8</van-col>
  <van-col span="8">span: 8</van-col>
  <van-col span="8">span: 8</van-col>
</van-row>

<van-row>
  <van-col span="4">span: 4</van-col>
  <van-col span="10" offset="4">offset: 4, span: 10</van-col>
</van-row>

<van-row>
  <van-col offset="12" span="12">offset: 12, span: 12</van-col>
</van-row>

<van-row gutter="20">
  <van-col span="8">span: 8</van-col>
  <van-col span="8">span: 8</van-col>
  <van-col span="8">span: 8</van-col>
</van-row>

一、商品详情页面的轮播图功能实现

<!--pages/goods/index.wxml-->
<swiper indicator-dots style="height:300px;">
	<block wx:for="{{goodsImages}}" wx:key="*this">
		<swiper-item>
			<van-image lazy-load loading="loading" fit="cover" width="100%" height="300" src="{{item.content}}" />
		</swiper-item>
	</block>
</swiper>
<!-- 标题及价格 -->
<view style="background-color:white;padding: 10px 15px 0;font-family:'微软雅黑'">
	<view style="color:#C0A769;">
		<text style="font-size:11px;">￥</text>
		<text style="font-size:18px;">{{goodsData.start_price}}</text>
	</view>
	<van-row>
		<van-col span="16">
			<view style="color:black;font-size:16px;">{{goodsData.goods_name}}</view>
		</van-col>
		<van-col span="8" style="text-align:right;">
			<view class="iconfont icon-share share"> 分享</view>
		</van-col>
	</van-row>
	<view style="color:#939697;font-size:11px;">{{goodsData.goods_desc}}</view>
</view>
<van-cell-group border="{{false}}">
	<van-cell class="buydesc" title="全程护航，请放心购买" is-link />
</van-cell-group>

/* pages/goods/index.wxss *//* miniprogram/pages/goods/index.wxss */
.price .van-cell__title{
  color: rgba(181,154,81,1);
  font-size: 20pt;
}
.title .van-cell__title{
  font-size: 17pt;
}
.buydesc .van-cell__title{
  font-size: 13px;
}
.share{
  font-size:11px;background-color:#F5F9FA;color:#767A7B;border-radius:30px;padding: 5px 10px;margin-right: -27px;width: 50px;text-align: center;float: right;
}
.van-tag{
  margin-left: 10px;
}
.van-popup{
  background-color: #efefef;
}

// miniprogram/pages/goods/index.js
Page({

  /**
   * 页面的初始数据
   */
  data: {
    showLoginPanel:false,
    showSkuPanel: false,
    goodsId:0,
    goodsData:{},
    goodsImages: [],
    goodsContentInfo:{},
    goodsSkuData:{},
    selectedGoodsSku:{},
    selectedAttrValue:{},
    selectedGoodsSkuObject:{}
  },

  /**
   * 生命周期函数--监听页面加载
   */
  onLoad: async function (options) {
    let goodsId = options.goodsId
    this.data.goodsId = goodsId
    const eventChannel = this.getOpenerEventChannel()
    eventChannel.on('goodsData', (res)=> {
      console.log(res)
      let goodsImages = res.data.goods_infos.filter(item=>(item.kind == 0))
      let goodsContentInfo = res.data.goods_infos.filter(item=>(item.kind == 1))[0]

      this.setData({
        goodsData:res.data,
        goodsImages,
        goodsContentInfo
      })
    })
    // 拉取sku规格数据
    let goodsSkuDataRes = await wx.wxp.request({
      url: `http://localhost:3000/goods/goods/${goodsId}/sku`,
    })
    if (goodsSkuDataRes){
      let goodsSkuData = goodsSkuDataRes.data.data 
      this.setData({
        goodsSkuData
      })
    }
  },

})

{
  "usingComponents": {
    "van-image": "@vant/weapp/image/index",
    "van-row": "@vant/weapp/row/index",
    "van-col": "@vant/weapp/col/index",
    "van-cell": "@vant/weapp/cell/index",
    "van-cell-group": "@vant/weapp/cell-group/index",
    "van-popup": "@vant/weapp/popup/index",
    "van-button": "@vant/weapp/button/index",
    "van-tag": "@vant/weapp/tag/index",
    "van-goods-action": "@vant/weapp/goods-action/index",
    "van-goods-action-icon": "@vant/weapp/goods-action-icon/index",
    "van-goods-action-button": "@vant/weapp/goods-action-button/index",
    "LoginPanel":"../../components/login"
  }
}

二、效果