1.wxml

<view>
<button bindtap='wxpay' class='css'>發(fā)起支付</button>
</view>

2.js

// pages/pay/pay.js
var app=getApp();
Page({
  wxpay: function(){
    var code=app.code;
    wx.request({
      //我把文件夾名改為了wxpayapi,SERVER_PATH為服務(wù)器的域名
      url: SERVER_PATH+'wxpayapi/example/jsapi.php', 
      data: {
        code: code
      },
      header: {
        'content-type': 'application/json' // 默認(rèn)值
      },
      success: function (res) {
        console.log(res.data);
        var data=res.data;
        wx.requestPayment({
          'timeStamp': data.timeStamp,
          'nonceStr': data.nonceStr,
          'package': data.package,
          'signType': 'MD5',
          'paySign': data.paySign,
          'success': function (res) {
            console.log("支付成功！")
          },
          'fail': function (res) {
          }
        })
      }
    })
  }
})