微信小程序实现购物车功能，包含完整小程序代码和运行效果截图

逃离我推掉我的手 2022-10-08 02:22 160阅读 0赞

微信小程序实现购物车功能，在商场比较常见，今天刚刚做好，效果不错。

下面从js文件，json文件，wxml文件和wxss文件，分享给大家。

直接上代码：

**目录**

1.index.js文件内容

2.index.json文件内容

3.index.wxml文件内容

4.index.wxss文件内容

5.购物车效果截图

--------------------

# 1.index.js文件内容 #

//获取应用实例
    const app = getApp()
    Page({
    
      data: {
        remark: '',
        goodsInfo: {},
        receiveName: '',
        receiveMobile: '',
        receiveAddress: '',
        orderRemarks: '',
        couponUsed:"没有优惠劵",
        couponAmount: 0,//优惠金额
        couponInfoListMap:[],
        userCouponInfo:null,
        goodsId: "",
        openId: "",
        goodsNum: 0,
        goodsPrice: 0.0,//商品总金额
        goodsLogisticsPrice: 0.0,
        goodsTotalPrice: 0,//支付金额
        currentColorIndex: 0,
        currentColorId: "",
        currentColorText: "",
        currentLogisticsIndex: 0,
        currentLogisticsType: 0,
        currentLogisticsText: "",
        addCart: 0,
        cartIds: "",
        goodsList: [],
        curGoodsNums:{}
      },
      onLoad: function(opt) {
        app.isLogin((data)=>{      
        let cartIdsValue = '';
        if(opt!=undefined){
          cartIdsValue=opt.cartIds;
        }    
        app.$post(app.API_ShowMyCart, {}, (res) => {
          let cartIdsTmp = ""
          for (let goods of res.data) {
            //console.log("goods.id=" + goods.id);
            if (cartIdsTmp != ""){
              cartIdsTmp = cartIdsTmp+","
            }
            cartIdsTmp = cartIdsTmp + goods.id
          }
          cartIdsValue = cartIdsTmp
          //console.log("cartIds=" + cartIdsValue);
          this.GetGoodsInfo(cartIdsValue)
        });
        },'1') 
      },
      onShow: function(opt){
        this.onLoad();
      },
      selectLogistics(e) {
        let index = e.currentTarget.dataset.index
        let currentLogisticsText = e.currentTarget.dataset.logisticsname
        let logisticsType = e.currentTarget.dataset.logisticstype
        this.setData({
          currentLogisticsIndex: index,
          currentLogisticsType: logisticsType,
          currentLogisticsText: currentLogisticsText
        })
        if (logisticsType != 2) {
          this.setData({
            goodsLogisticsPrice: 0
          })
          this.countTotalPrice()
        } else {
          this.getLogisticsFee()
        }
      },
      getLogisticsFee() {
        let orderParam = {
          logisticsType: this.data.currentLogisticsType,
          receiveAddress: this.data.receiveAddress
        }
        app.$post(app.API_getLogisticsFees, orderParam, (res) => {
          if (res.statusCode == 0) {
            let dataStatus = res.data.status
            if (dataStatus == 2) {
              app.wxTips("没有覆盖，不能下单，请见谅！")
            } else {
              this.setData({
                goodsLogisticsPrice: res.data.fee
              })
              this.countTotalPrice()
            }
          }
        })
      },
      callkf(e) { // 联系客服
        app.callkf()
      },
      orderRemarks: function(e) {
        this.setData({
          orderRemarks: e.detail.value
        })
      },
      payPrice() {
        this.generateOrder()
      },
      deleteCart: function (e) {
        let cartId = e.currentTarget.dataset.id;
        this.saveCartStatus(this.data.goodsList)
        //console.log("cartId=" + cartId);
        app.$post(app.API_MoveOutCart, { 'cartIds': [cartId] }, (res) => {
          if (res.statusCode != 0) {
            app.wxTips("修改失败！")
          }else{
            app.wxTips("删除成功！")
          }
          this.GetGoodsInfo(this.data.cartIds)
        })
    
      },
      enlarge(e) {
        var src = e.currentTarget.dataset.src;//获取data-src
        var imgList = [src]
        //图片预览
        wx.previewImage({
          current: src, // 当前显示图片的http链接
          urls: imgList // 需要预览的图片http链接列表
        })
      },
      generateOrder() { /**生成商户订单 */
        if (this.data.receiveMobile == '') {
          app.wxTips("请选择配送地址！")
        } else {
          if (this.data.currentLogisticsType == 2) {
            this.getLogisticsFee()
          }
          let orderList = []
          for (let goods of this.data.goodsList) {
            let goodAttribute = goods.attribute;
            let attributeName="";
            if (goodAttribute != "" && goodAttribute != null && typeof goodAttribute != "undefined") {
              attributeName = goodAttribute.attributeName;
              if (attributeName == null || typeof attributeName == "undefined"){
                attributeName="";
              }
            }
            orderList.push({
              goodsId: goods.goodsId,
              goodsAmount: goods.goodsAmount,
              goodsPrice: goods.goodsPrice,
              goodsTotalPrice: goods.goodsPrice,
              receiveName: this.data.receiveName,
              receiveMobile: this.data.receiveMobile,
              receiveAddress: this.data.receiveAddress,
              orderRemarks: this.data.orderRemarks,
              goodsSku: attributeName,
              goodsSkuName: attributeName,
              goodsLogistics: this.data.currentLogisticsText,
            })
          }
          let couponId=0;
          let couponPrice=0;
          if(this.data.userCouponInfo!=null){
            couponId=this.data.userCouponInfo.couponId;
            couponPrice=this.data.userCouponInfo.couponAmount;
          }
          let orderParam = {
            confirmOrders: orderList,
            cartIds: this.data.cartIds,
            couponId:couponId,
            couponPrice:couponPrice
          }
          //console.log("立即支付orderParam=" + JSON.stringify(orderParam));
          
          app.$post(app.API_ConfirmCartOrder, orderParam, (res) => {
            if (res.statusCode == 0) {
              let orderId = res.data
              if (orderId != "" && orderId != null && typeof orderId != "undefined") {
                let paramObj = Object.assign(orderParam, {
                  orderId: orderId,
                  goodsTotalPrice:this.data.goodsTotalPrice
                })
                let paramStr = app.urlStr(paramObj)
                app.go('../cartorderpay/index' + paramStr)
              }
            } else {
              app.wxTips(res.errorMsg)
            }
          })
        }
      },
      GetGoodsInfo(cartIds) {
        if(cartIds==undefined||cartIds==''||cartIds.length<=0){
          app.wxTips("购物车没有商品，自动返回首页！")
          wx.switchTab({url: "/pages/index/index"})
        }else{
            //获取订单详情
            this.setData({
              cartIds: cartIds
            })
            app.$post(app.API_BalanceMyCart, {
              cartIds: cartIds.split(',')
            }, (res) => {
              if (res.statusCode == 0) {
                //自动跳转不能砍，逻辑。。。。竟然会报错
                if(res.data.length<=0){
                  wx.switchTab({url: "/pages/index/index"})
                }else{
                  this.setData({
                    goodsList: res.data
                  })
                  //console.log(this.data.goodsList)
                  //console.log("res.data=" + JSON.stringify(res.data));
                  let goodsPrice = 0.00              
                  let goodsNum = 0
                  let couponNum = 0
                  let couponInfoListMap=[]
                  let logisticsList = res.data.logisticsList
                  //开始计算商品总数，总价
                  for (let goods of res.data) {
                    let goodsTotalPrice = (goods.goodsAmount * goods.goodsPrice)
                    goodsTotalPrice = parseFloat(goodsTotalPrice).toFixed(2);
                    goodsPrice += goodsTotalPrice
                    goodsNum += goods.goodsAmount
                    couponNum = goods.couponNum
                    if(couponNum>=1){
                      couponInfoListMap=goods.couponInfoListMap;
                    }
                  }
                  goodsPrice = parseFloat(goodsPrice).toFixed(2);
                  let receivePerson = res.data[0];
                  this.setData({
                    currentLogisticsText: (logisticsList != undefined && logisticsList.length > 0) ? logisticsList[0].logisticsName : "",
                    receiveName: receivePerson.receiveName != undefined ? receivePerson.receiveName : "",
                    receiveMobile: receivePerson.receiveMobile != undefined ? receivePerson.receiveMobile : "",
                    receiveAddress: receivePerson.receiveAddress != undefined ? receivePerson.receiveAddress : "",
                    goodsPrice: goodsPrice,
                    goodsTotalPrice: goodsPrice,
                    couponInfoListMap: couponInfoListMap,
                    goodsNum: goodsNum
                  });
                  this.countTotalPrice();
                }
              }
            })
        }
        
      },
    
      countTotalPrice() {
        //计算商品价格
        let goodsPrice= 0.00
        let goodsTotalPrice = 0.00    
        for (let goods of this.data.goodsList) {
          //goodsPrice += (goods.goodsAmount * goods.goodsPrice)
          goodsPrice += (1 * goods.goodsPrice)
          //console.log("goodsPrice=" + goodsPrice+"//goodsPrice="+goods.goodsPrice);
        }
        goodsPrice = parseFloat(goodsPrice).toFixed(2);
        goodsTotalPrice = parseFloat(goodsPrice).toFixed(2);
        //console.log("goodsTotalPrice=" + goodsTotalPrice);
        //判断是否使用优惠劵
        let couponInfoListMap=this.data.couponInfoListMap
        let userCouponInfo=null;
        if(couponInfoListMap.length>=1){
          for (let couponInfo of couponInfoListMap) {
            //console.log("couponInfo=" + JSON.stringify(couponInfo));
            if(couponInfo.useConditionsContent<=goodsTotalPrice){
              if(userCouponInfo==null){//只有1张优惠劵满足条件
                userCouponInfo=couponInfo;
              }else{//有多张优惠劵满足条件
                if(couponInfo.couponAmount>userCouponInfo.couponAmount){
                  userCouponInfo=couponInfo;
                }
              }          
            }
          }
        }
        if(userCouponInfo!=null){
          //console.log("userCouponInfo=" + JSON.stringify(userCouponInfo));
          let couponAmount=userCouponInfo.couponAmount;
          if(couponAmount>=goodsTotalPrice){
            couponAmount=goodsTotalPrice;
          }
          goodsTotalPrice=goodsTotalPrice-couponAmount;
          this.setData({
            couponUsed: '使用'+couponAmount+'元优惠券',
            couponAmount:couponAmount,
            userCouponInfo:userCouponInfo
          })
        }else{
          this.setData({
            couponUsed: '没有优惠券',
            couponAmount:0,
            userCouponInfo:null
          })
        }
        goodsTotalPrice = parseFloat(goodsTotalPrice).toFixed(2);
        //最终价格
        this.setData({
          goodsPrice: goodsPrice,
          goodsTotalPrice: goodsTotalPrice
        })
      },
      setAddress(e) {
        app.go(`../../my/my-address/index?handler=order`)
      },
    
      reduce(e) {
        let index = e.currentTarget.dataset.index  // 获取数据的索引
        let curGoodNum = this.data.goodsList[index].goodsAmount;
        if (curGoodNum>=2){
          //商品数量
          let temp = 'goodsList[' + index + '].goodsAmount'  // 获取goodsList[index].num
          this.setData({[temp]: curGoodNum - 1})
          //商品价格
          let curGoodPrice = this.data.goodsList[index].goodsPrice;
          let tempgoodsPrice = 'goodsList[' + index + '].goodsPrice'  // 获取goodsList[index].num
          this.setData({[tempgoodsPrice]:  parseFloat((curGoodPrice/curGoodNum)*(curGoodNum - 1)).toFixed(2)})
    
          this.setData({ goodsNum: this.data.goodsNum-1 })
          this.countTotalPrice()
        }
        if (curGoodNum<=1){//提示不能小于0
          app.wxTips("商品数量不能小于1件")
        }
      },
      add(e) {
        let index = e.currentTarget.dataset.index  // 获取数据的索引
        let that=this
        //商品数量
        let curGoodNum = this.data.goodsList[index].goodsAmount;
        let temp = 'goodsList[' + index + '].goodsAmount'  // 获取goodsList[index].num
        this.setData({ [temp]: curGoodNum + 1})
        //商品价格
        let curGoodPrice = this.data.goodsList[index].goodsPrice;
        let tempgoodsPrice = 'goodsList[' + index + '].goodsPrice'  // 获取goodsList[index].num
        this.setData({[tempgoodsPrice]:  parseFloat((curGoodPrice/curGoodNum)*(curGoodNum + 1)).toFixed(2)})
        this.setData({ goodsNum: this.data.goodsNum + 1 })
        this.countTotalPrice()    
      },
      saveCartStatus(cartList){
        //console.log("购物车：")
        //console.log(cartList)
        let shoppingCarts = {
          shoppingCarts:cartList
        };
        app.$post(app.API_UpdateCartStatus, shoppingCarts, (res) => {
          if (res.statusCode != 0) {
            app.wxTips("修改失败！")
          }else{
            app.wxTips("删除成功！")
          }
        })
      },
      callkf(e) { // 联系客服
        app.callkf()
      },
      callpjindex(e) { // 跳转到首页
        app.go(`/pages/index/index`)
      }
    })

# 2.index.json文件内容 #

> \{
> 
>   "navigationBarTitleText": "购物车"
> 
> \}

# 3.index.wxml文件内容 #

<wxs src="../../../wxs/tools.wxs" module="tools" />
    <view class='service-wrap'>
      <view wx:for="{
       {goodsList}}" wx:key="{
       {index}}">
        <view class='goods-wrap'>
          <view id='dataList'>
            <view class='list-top'>
              
              <view class='goods-list'>
                <view class='goods-img'>
                  <image src='{
       {item.mainImg}}' mode='widthFix' data-src="{
       {item.mainImg}}" bindtap="enlarge"></image>
                </view>
                <view class='goods-con confirm'>
                  <view>
                    <view class='goo-left'>
                      <view class='order-describe'>{
       {item.goodsName}}</view>
                    </view>
                    <view class='goo-right'>
                      <view class='order-price'>￥{
       {item.goodsPrice}}</view>             
                    </view>
                  </view>
                  <view>              
                         <view class='jiajian'>
                          <view class='reduce' data-index='{
       {index}}' bindtap='reduce'>
                            <image src='../../../images/index/icon_reduce.png'></image>
                          </view>
                          <view class='goodnum'>{
       {item.goodsAmount}}</view>
                          <view class='add' data-index='{
       {index}}' bindtap='add'>
                            <image src='../../../images/index/icon_add.png'></image>
                          </view>  
                          <view style="width:70px;"></view> 
                          <view class='del-btn' data-id='{
       {item.cartId}}' bindtap='deleteCart'>删除</view>                  
                    </view>
                  </view>
                </view>
              </view>
            </view>
          </view>
        </view>
    
        
        <view class='price-item'>
          <view class='price-left'>
            <text>颜色分类</text>
          </view>
          <view class='price-right'>
              {
       {item.attribute.attributeName}}
          </view>
        </view>
    
      </view>
      <view>
        
        <view class='price-item' wx:if="{
       {goodsInfo.logisticsList.length>0}}">
          <view class='price-left'>
            <text>配送方式</text>
          </view>
          <view class='price-right'>
            <text class="select-logistics {
       {index==currentLogisticsIndex?'select-logistics-on':''}}" wx:for='{
       {goodsInfo.logisticsList}}' wx:key="{
       {index}}" bindtap="selectLogistics" data-index="{
       {index}}" data-logisticsname="{
       {item.logisticsName}}" data-logisticstype="{
       {item.logisticsType}}">{
       {item.logisticsName}}</text>
          </view>
        </view>
        <view class='price-item'>
          <view class='price-left'>
            <text>优惠券</text>
          </view>
          <view class='price-right'>
            <text class='coupon'>{
       {couponUsed}}</text>
          </view>
        </view>
        <view class='buyer-message'>
          <textarea class='fb-area' placeholder="选填，可填写和卖家达成一致的要求" value='{
       {orderRemarks}}' bindinput="orderRemarks" placeholder-style="color:#ccc"></textarea>
        </view>
        <view class='adress' bindtap='setAddress'>
          <view style='width:120px'>
            配送地址：
          </view>
          <view>
            <view>{
       {receiveName}} {
       { receiveMobile}}</view>
            <view>{
       {receiveAddress}}</view>
          </view>
          <text class=' row-right czs-angle-right-l'></text>
        </view>
        <view class='amount'>共
          <text>{
       {goodsNum}}件商品</text>
        </view>
    
      </view>
    
    
      
      <view class='goods-info'>
        <view class='number'>
          <view class='jiajian'>
            <text>{
       {goodsAmount}}</text>
          </view>
        </view>
        <view class='price-item'>
          <view class='price-left'>
            <text>商品金额</text>
          </view>
          <view class='price-right'>
            <text class='je'>￥{
       {goodsPrice}}</text>
          </view>
        </view>
    
        <view class='price-item'>
          <view class='price-left'>
            <text>优惠</text>
          </view>
          <view class='price-right'>
            <text class='je'>-￥{
       {couponAmount}}</text>
          </view>
        </view>
        <view class='price-item'>
          <view class='price-left'>
            <text>运费</text>
          </view>
          <view class='price-right'>
            <text class='je'>+￥{
       {goodsLogisticsPrice}}</text>
          </view>
        </view>
      </view>
      <view class='total-price'>合计：￥
        <text>{
       {goodsTotalPrice}}</text>
      </view>
    </view>
    <view class='com-btn' bindtap='payPrice'>确认付款</view>

# 4.index.wxss文件内容 #

@import "../../../plugn/caomei/style.wxss";
    page{padding-bottom: 70px;}
    .tips{font-size:10px;color:#F0AD4E;margin-left:5px;}
    
    /* 服务地址 */
    .czs-location-l{display: inline-block;}
    .address{background-color: #fc6737; color: #FFFFFF; padding: 10px 15px; position: relative;display: flex;}
    .service-time{position: absolute; bottom: -25px; background-color: #FFFFFF;border-radius: 5px;left: 10px;right: 10px;height: 50px; color: #fc6737; text-align: center; line-height: 50px;font-size: 14px;}
    .service_consignee{flex: 1;font-size: 14px; padding-left: 10px;}
    .service_consignee.mb{margin-bottom: 25px;}
    /* .service_consignee .consignee{}
    .service_consignee .mobile{} */
    
    /* 服务项目 */
    .conf-title{padding: 10px 15px ;font-size: 14px;color: #333;}
    .conf-title.mt{ margin-top: 25px;}
    .conf-title.center{text-align: center;margin-top: 0px;}
    .conf-title.left{text-align: left;margin-top: 0px;}
    .amount{background-color: #f7f7f7; line-height: 30px; text-align: center;font-size: 12px;margin-top: 10px;}
    .service-wrap{margin: 0 15px;background: #fff;border-radius: 6px; overflow: hidden; position: relative;padding: 10px 10px 0 10px;}
    .goods-wrap{padding-bottom: 10px;border-bottom: #f8f8f8 1px solid;border-top: #f8f8f8 1px solid;}
    .price-item{line-height: 30px; display: flex;justify-content: space-between;}
    .price-item .price-right{padding-top: 5px;font-size: 12px;}
    .price-item .price-left{width:120px;}
    .price-item .price-left text:nth-of-type(1){font-size: 12px;color: #333;}
    .price-item .price-left text:nth-of-type(2){font-size: 10px;color: #F0AD4E;margin-left: 5px;}
    .total-price{text-align: right; line-height: 40px;border-top: #f8f8f8 1px solid;font-size: 12px;color: #666;}
    .total-price text{font-size: 18px;font-weight: bold;}
    .dispatch-list{margin-bottom: 10px;}
    .dispatch-list view{font-size: 12px;line-height: 20px;margin: 0px;color: #8f8f94;}
    .dispatch-list .line{color: #fc6737;margin-left: 10px;}
    
    /* 备注 */
    .remark-wrap{background: #fff;border-radius: 6px;font-size: 14px;margin: 0 15px;padding:10px;}
    .remark-wrap .text{margin-bottom: 6px;}
    
    .coupon{ background: #07c160; color: #FFFFFF; padding: 2px 3px; border-radius: 5px}
    .buyer-message{ margin-top: 5px; border:1px solid #e5e5e5;}
    .buyer-message textarea{font-size: 14px; height: 60px; padding: 5px; border-radius: 5px}
    .adress{ font-size: 12px;display: flex;justify-content:space-around; margin-top: 10px}
    .adress .row-right{ padding-top: 10px}
    .goods-info{ border-top: 1px solid #e5e5e5;border-bottom: 1px solid #e5e5e5; margin-top: 10px}
    .goods-info .je{ color: #fc6737}
    .pay-btn{text-align: right; height: 40px}
    .pay-btn text{ background-color: #07c160;color: #FFFFFF; padding: 5px 8px; border-radius: 5px; font-size: 14px}
    .del-btn{ background-color: #07c160;color:#fff;padding-top:2px;padding-left:10px;padding-right:10px;}
    .com-btn{ background-color: #07c160;}
    .number{display: flex;font-size: 12px;justify-content: space-between; padding-top: 10px}
    .select-color{padding-left: 5px;padding-right: 5px;font-size: 12px; border: 1px solid #e5e5e5; display: inline-block;  height: 24px; line-height: 24px; text-align: center; margin: 0 5px;}
    .select-color-on{padding-left: 5px;padding-right: 5px;font-size: 12px; color: #fff;background-color: #07c160;}
    .select-logistics{padding-left: 5px;padding-right: 5px;font-size: 12px; border: 1px solid #e5e5e5; display: inline-block;  height: 24px; line-height: 24px; text-align: center; margin: 0 5px;}
    .select-logistics-on{padding-left: 5px;padding-right: 5px;font-size: 12px; color: #fff;background-color: #07c160;}
    
    .jiajian .goodnum{margin-left: 5px; margin-right: 15px;max-width: 35px;text-align: center;}

# 5.购物车效果截图 #

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2pscV9kaWxpZ2VuY2U_size_16_color_FFFFFF_t_70][]

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2pscV9kaWxpZ2VuY2U_size_16_color_FFFFFF_t_70 1][]

后期有时间了，把完整项目分享给大家，欢迎大家留言。

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