var app = getApp(); Page({   data: {},   onLoad: function (options) {      // 页面初始化 options为页面跳转所带来的参数     var that = this      //登陆获取code      wx.login({        success: function (res) {         console.log(res.code)         //获取openid         that.getOpenId(res.code)       }     });   },   getOpenId: function (code) {     var that = this;     wx.request({       url: "https://api.weixin.qq.com/sns/jscode2session?appid=小程序appid&secret=小程序应用密钥&js_code=" + code + "&grant_type=authorization_code",       data: {},       method: 'GET',       success: function (res) {         that.generateOrder(res.data.openid)       },       fail: function () {         // fail       },       complete: function () {         // complete       }     })   },   /**生成商户订单 */   generateOrder: function (openid) {     var that = this     //统一支付     wx.request({       url: '后台路径',       method: 'GET',       data: {         gfee: '商品价钱',         gname: '商品名称',         openId:openid         （商品价钱和商品名称根据自身需要是否传值,openid为必传）       },       success: function (res) {         var pay = res.data         //发起支付         var timeStamp = pay[0].timeStamp;         var packages = pay[0].package;         var paySign = pay[0].paySign;         var nonceStr = pay[0].nonceStr;         var param = { "timeStamp": timeStamp, "package": packages, "paySign": paySign, "signType": "MD5", "nonceStr": nonceStr };         that.pay(param)       },     })   },     /* 支付  */   pay: function (param) {     console.log("支付")     console.log(param)     wx.requestPayment({       timeStamp: param.timeStamp,       nonceStr: param.nonceStr,       package: param.package,       signType: param.signType,       paySign: param.paySign,       success: function (res) {         // success         wx.navigateBack({           delta: 1, // 回退前 delta(默认为1) 页面           success: function (res) {             wx.showToast({               title: '支付成功',               icon: 'success',               duration: 2000             })           },           fail: function () {             // fail             },           complete: function () {            // complete           }         })       },       fail: function (res) {         // fail       },       complete: function () {         // complete       }     })   } })