parseInt 是由于编辑器和真机不太一样；优惠券显示在总金额中

pages/cart/cart.js

@@ -124,7 +124,7 @@ Page({
     }
 
     order.postBilling(params, function(result){
-      if (result.statusCode === '403') {
+      if (parseInt(result.statusCode) === 403) {
         wx.showModal({
           title: '出错',
           content: result.data.msg,
@@ -144,7 +144,11 @@ Page({
               showCancel: false,
               success: function(res) {
                 if (res.confirm) {
-                  that.setData({cartItems: []})
+                  that.setData({
+                    cartItems: [],
+                    coupon: null
+                  })
+                  that.changeCartAmount()
                 }
               }
             })
@@ -179,7 +183,7 @@ Page({
         amount += entry.quantity * entry.product['member-price']
       })
     }
-    
+
     this.setData({amount: amount})
   },
 

pages/cart/cart.wxml

@@ -65,6 +65,11 @@
 
 
 <view class="billing-btn">
-  <view>总计：¥{{amount}}元</view>
+  <view wx:if="{{coupon}}">
+    <view>总计：¥{{amount}}元 {{'-' + coupon['coupon-value'] + '元优惠券' }}</view>
+  </view>
+  <view wx:else>
+    <view>总计：¥{{amount}}元</view>
+  </view>
   <button class="button" type='warn' bindtap="bindBilling"> 去支付 </button>
 </view>

pages/mine/mine.js

@@ -105,7 +105,7 @@ Page({
       data: {code: app.globalData.code},
       method: 'POST',
       success: function(res) {
-        if (res.statusCode === '200') {
+        if (parseInt(res.statusCode) === 200) {
           wx.removeStorage({ key: 'token' })
           app.globalData.currentCustomer = null
           app.globalData.token = null