前言

vant-weapp的Popup 弹出层api

Props

Events

外部样式类

一、商品详情页面规格选择功能实现

<!--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>
<!-- 运费说明 -->
<van-cell-group border="{{false}}">
	<van-cell class="buydesc" title="全程护航，请放心购买" is-link />
</van-cell-group>

<van-cell-group title=" ">
	<van-cell value="" is-link>
		<view slot="title">
			<text style="float: left;padding-right: 10px;font-size: 13px;color: gray;">运费</text>
			<view>免运费</view>
		</view>
	</van-cell>
</van-cell-group>
<!-- 商品规格 -->
<van-cell-group title=" ">
	<van-cell value="" is-link>
		<view slot="title">
			<text style="float: left;padding-right: 10px;font-size: 13px;color: gray;">服务</text>
			<view>收货后结算</view>
		</view>
	</van-cell>
	<van-cell value="" is-link bind:click="showSkuPanelPopup">
		<view slot="title">
			<text style="float: left;padding-right: 10px;font-size: 13px;color: gray;">规格</text>
			<view>
				{{selectedGoodsSkuObject.text || "选择"}}
			</view>
		</view>
	</van-cell>
</van-cell-group>
<!-- 商品描述 -->
<view style="padding:10px 10px 100px;">
  <van-image wx:for="{{goodsImages}}" wx:key="content" lazy-load loading="loading" fit="cover" width="100%" height="300" src="{{item.content}}" />
  <text>{{goodsContentInfo.content}}</text>
</view>
<!-- 购物车 -->
<van-goods-action>
  <van-goods-action-icon icon="cart-o" text="购物车" info="0" />
  <van-goods-action-icon icon="shop-o" text="店铺" />
  <van-goods-action-button bindtap="addToCart" text="加入购物车" type="warning" />
  <van-goods-action-button text="立即购买" />
</van-goods-action>
<!-- 商品规格 -->
<van-popup show="{{showSkuPanel}}" closeable position="bottom" round custom-style="min-height:200px;background-color: #efefef;" bind:close="onCloseSkuPanel">
	<view style="width:100%;background-color: #efefef;display:flex;padding:10px 10px 0;">
		<view>
			<image style="width:100px;height:100px;border-radius:5px;" src="{{goodsImages[0].content}}" />
		</view>
		<view style="flex:1;padding-left:10px;color: gray;padding-top: 10px;">
			<view>价格：{{selectedGoodsSku.price/100}}元</view>
			<view>库存：{{selectedGoodsSku.stock}}</view>
			<view>规格：
				<text wx:for="{{goodsSkuData.goodsAttrKeys}}" wx:key="attr_key" style="padding-right:5px;">{{selectedAttrValue[item.attr_key].attr_value}}</text>
			</view>
		</view>
	</view>
	<block wx:for="{{goodsSkuData.goodsAttrKeys}}" wx:key="attr_key">
		<van-cell-group title=" ">
			<van-cell>
				<view slot="title">
					<view class="van-cell-text">{{item.attr_key}}</view>
					<block wx:for="{{item.goods_attr_values}}" wx:for-item="item2" wx:key="attr_value">
						<van-tag bindtap="onTapSkuTag" data-attrvalue="{{item2}}" data-attrkey="{{item.attr_key}}" plain="{{item2.id!=selectedAttrValue[item.attr_key].id}}" type="primary">{{item2.attr_value}}</van-tag>
					</block>
				</view>
			</van-cell>
		</van-cell-group>
	</block>
	<van-button bindtap="onConfirmGoodsSku" type="primary" size="large">确定</van-button>
</van-popup>

/* 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
      })
    }
  },
  // 显示规格面板
  showSkuPanelPopup() {
    this.setData({ showSkuPanel: true });
  },
  
  // 关闭规格面板
  onCloseSkuPanel(){
    this.setData({ showSkuPanel: false });
  },
  //选择商品规格
  onTapSkuTag(e){
    // 获取及设置选择的规格
    let attrvalue = e.currentTarget.dataset.attrvalue
    let attrKey = e.currentTarget.dataset.attrkey

    console.log('attrvalueid',attrvalue,attrKey);
    let selectedAttrValue = this.data.selectedAttrValue
    selectedAttrValue[attrKey] = attrvalue
    this.setData({
      selectedAttrValue
    })
    // 计算价格及库存
    let totalIdValue = 0
    let goodsAttrKeys = this.data.goodsSkuData.goodsAttrKeys
    for (let j=0;j<goodsAttrKeys.length;j++){
      let attrKey = goodsAttrKeys[j].attr_key
      if (selectedAttrValue[attrKey]){
        totalIdValue+=selectedAttrValue[attrKey].id
      }
    }
    console.log("totalIdValue", totalIdValue);
    
    let goodsSku = this.data.goodsSkuData.goodsSku
    let tempTotalIdValue = 0

    for(let j=0;j<goodsSku.length;j++){
      let goodsAttrPath = goodsSku[j].goods_attr_path 
      if (goodsAttrPath.length != goodsAttrKeys.length){
        break
      }
      tempTotalIdValue = 0
      goodsAttrPath.forEach(item=>tempTotalIdValue += item)
      console.log("tempTotalIdValue",tempTotalIdValue);

      if (tempTotalIdValue == totalIdValue){
        let selectedGoodsSku = goodsSku[j]
        this.setData({
          selectedGoodsSku
        })
        break;
      }
    }
  },

  // 确定选择当前规格
  onConfirmGoodsSku(){
    let goodsSkuData = this.data.goodsSkuData
    let selectedGoodsSkuObject = this.data.selectedGoodsSkuObject
    selectedGoodsSkuObject.sku = Object.assign({}, this.data.selectedGoodsSku)
    selectedGoodsSkuObject.text = ''
    for (let j=0;j<goodsSkuData.goodsAttrKeys.length;j++){
      let item = goodsSkuData.goodsAttrKeys[j]
      if (!this.data.selectedAttrValue[item.attr_key]){
        wx.showModal({
          title: '没有选择全部规格',
          showCancel:false
        })
        return
      }
      selectedGoodsSkuObject.text += this.data.selectedAttrValue[item.attr_key].attr_value + ' '
    }
    this.setData({
      selectedGoodsSkuObject,
      showSkuPanel: false
    })
  },

})

{
  "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