plus会员差价

src/pages/confirmOrder/confirmOrder.js

 // pages/confirmOrder/confirmOrder.js
 const wxService = require('../../utils/wxService')
 const app = getApp()
+const utils = require('../../utils/util')
 
 wxService.page({
   /**
@@ -15,6 +16,9 @@ wxService.page({
     trolleySku2Buy: Array,
     currentOrderList: Array,
     isSelect: false,
+    selectPrice:'',
+    noSelectPrice:'',
+    plusSpread:'',
     goodsAddress: false,
     citys: null,
     cityView: '',
@@ -308,6 +312,27 @@ wxService.page({
         const { result, data } = res.data
         if (result == 0) {
           wx.hideLoading()
+         let skuList = data.tradePreviewSkus
+
+        let sum =0
+         skuList.forEach((item,index) => {
+          //  item.price
+          sum += skuList[index].price
+         })
+
+         // 初始化商品价格
+         const { isSelect } = this.data
+
+         if(isSelect){
+           this.setData({
+             selectPrice: sum
+           })
+         } else {
+          this.setData({
+            noSelectPrice: sum
+          })
+         }
+        
           this.setData({
             currentOrderList: data,
             defalutCoupon: data && data.couponDiscountPreviews.length && data.couponDiscountPreviews[0].couponDiscount || '',

src/pages/confirmOrder/confirmOrder.wxml

@@ -115,7 +115,7 @@
 					<view class="plus-price" wx:if="{{isSelect}}">
 						<view class="plus-info">
 							<text class="price-label">plus会员价</text>
-							<text class="member-price">-￥20</text>
+							<text class="member-price">-￥{{utils.numberFormat(noSelectPrice - selectPrice)}}</text>
 						</view>
 						<text class="plus-member-price total-price">￥{{plusMemberPrice}}</text>
 					</view>

src/utils/util.js

@@ -294,6 +294,10 @@ const formatNumber = n => {
   return n[1] ? n : '0' + n
 }
 
+function getSum(preValue,curValue,index, array) {
+  return preValue + curValue;
+}
+
 function _getUserInfo(ev) {
   const userInfo = ev.detail || ev
   return getUserInfoByBtn(userInfo).then((data = {}) => {
@@ -351,6 +355,7 @@ wxService.setGetAuthUserInfo(_getUserInfo);
 module.exports = {
   _getUserInfo,
   formatTime,
+  getSum,
   getCurrentPageUrl,
   getCurrentRouter,
   getCurrentPageUrlWithArgs,