Mod:修改付款时进入后台再切回前台连接断开，解决方案：在onshow中重新建立连接。

pages/payment/payment.js

@@ -94,6 +94,52 @@ Page({
     })
   },
   onShow() {
+    
+    //页面显示
+     dd.connectSocket({
+      url: `ws://${app.globalData.globalUrl}/v1/mingpaywebsocket?param=${dd.corpId}_${dd.getStorageSync({ key: 'userId' }).data}`,
+      data: {},
+      header:{
+        'content-type': 'application/json',
+        'Authorization': `Bearer ${dd.getStorageSync({ key: 'token' }).data.access_token}`
+      },
+      method:"GET",
+    });
+    dd.onSocketOpen(function(res) {
+      console.log('WebSocket 连接已打开！');
+    });
+    dd.onSocketError(function(res){
+      console.log('WebSocket 连接打开失败，请检查！');
+    });
+    dd.onSocketMessage(function(res) {
+      console.log(JSON.parse(res.data))
+      let resData = JSON.parse(res.data)
+      if(resData.paymentCode === 0){
+        dd.redirectTo({
+          url: `./../paySuccess/paySuccess?money=${(JSON.parse(res.data).orderAmount).toFixed(2)}`
+        })
+      }else if(resData.paymentCode === 10001){
+        dd.alert({
+          content: '账户状态异常',
+          buttonText: '确定'
+        });
+      }else if(resData.paymentCode === 10002){
+        dd.alert({
+          content: '卡片状态异常',
+          buttonText: '确定'
+        });
+      }else if(resData.paymentCode === 10003){
+        dd.alert({
+          content: '账户余额不足',
+          buttonText: '确定'
+        });
+      }else if(resData.paymentCode === 10004){
+        dd.alert({
+          content: '二维码失效',
+          buttonText: '确定'
+        });
+      }
+    })
 
   },
   onHide() {