//index.js

Page({

  data: {

  },

  //点击支付按钮进行支付

  payclick: function () {

    var t = this;

    wx.login({

      //获取code换取openID

      success: function (res) {

        //code = res.code //返回code

        console.log("获取code");

        console.log(res.code);

        var opid = t.getOpenId(res.code);

      }

    })

  },

  //获取openID

  getOpenId: function (code) {

    var that = this;

    wx.request({

      url: "https://api.weixin.qq.com/sns/jscode2session?appid=你的appid&secret=AppSecret(小程序密钥)&js_code=" + code + "&grant_type=authorization_code",

      data: {},

      method: 'GET',

      success: function (res) {

        console.log("获取openid")

        console.log(res)

        that.setData({

          openid: res.data.openid,

          session_key: res.data.session_key

        })

        that.generateOrder(res.data.openid)

      },

      fail: function () {

        // fail

      },

      complete: function () {

        // complete

      }

    })

  },

  //生成商户订单

  generateOrder: function (openid) {

    var that = this

    wx.request({

      url: 'http://localhost:25492/wx/getda',//后台请求地址

      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) {

        console.log("后台获取数据成功");

        console.log(res);

        var param = { "timeStamp": res.data.timeStamp, "package": res.data.package, "paySign": res.data.paySign, "signType": "MD5", "nonceStr": res.data.nonceStr };

         //发起支付

        that.pay(param);

      },

      fail: function (res) {

        console.log("向后台发送数据失败")

      }

    })

  },

  //支付

  pay: function (param) {

    var that = this;

    console.log("发起支付")

    console.log(param)

    wx.requestPayment({

      timeStamp: param.timeStamp,

      nonceStr: param.nonceStr,

      package: param.package,

      signType: param.signType,

      paySign: param.paySign,

      success: function (res) {

        console.log("success");

        console.log(res);

      },

      fail: function (res) {

        console.log("fail")

        console.log(res);

      },

      complete: function (res) {

        console.log("complete");

        console.log(res)

      }

    })

  }

})