回退页面

const/actioncmd.js

@@ -63,3 +63,6 @@ export const ACTION_SEND_SEL_AD = "ACTION_SEND_SEL_AD";
 
 //系统设置
 export const ACTION_SYSTEM_SETTING = "ACTION_SYSTEM_SETTING";
+
+//结算页面back到扫商品页面
+export const ACTION_BALANCE_BACK_GOODS = "ACTION_BALANCE_BACK_GOODS";

pages/balance/balance.js

@@ -3,6 +3,7 @@ var payUtils = require("../../utils/payUtils.js");
 import { ACTION_GO_SCAN, ACTION_GO_HOME } from '../../const/actioncmd'
 import { ACTION_ON_PAY_SUCCESS } from '../../const/actioncmd'
 import { ACTION_ON_PAY_FAILED } from '../../const/actioncmd'
+import { ACTION_BALANCE_BACK_GOODS } from '../../const/actioncmd'
 
 Page({
   data: {
@@ -16,6 +17,24 @@ Page({
     isPaying: false,
   },
 
+  //回退到上一个页面
+  onBack(e) {
+    my.ix.sendBuddyMessage({
+      // 填入目标小程序的 AppID
+      target: getApp().globalData.backScreenAppId,
+      data: {
+        action: ACTION_BALANCE_BACK_GOODS,
+        data: null
+      },
+      success: (res) => {
+           e.preventDefault();
+      },
+      fail: (res) => {
+        console.info(`sendBuddyMessage failed: ${JSON.stringify(res)}`);
+      }
+    });
+  },
+
   onReady() {
     if (my.canIUse('hideBackHome')) {
       my.hideBackHome();