1。设置了一个button然后点击bindgetuserinfo

    bindgetuserinfo:function(e){

      wx.login({

        success: function (res) {

          console.log(res,res.code)

          if (res.code) {

            //发起网络请求

            wx.request({

              url: ‘https://djhs9zdo.qcloud.la/weapp/wxOpenId’,

              method: ‘post’,

              header: {

                ‘content-type’: ‘application/x-www-form-urlencoded’

              },

              data: {

                code: res.code

              },

              success: function (res) {

                //数据拆分完成

                // console.log(res.data.data[0].name)

                console.log(res.data.openid, res.data, )

              }

            })

          } else {

            console.log(‘登录失败！’ + res.errMsg)

          }

        }

      })

    }

2.code发送到后台 server里的 wxOpenId.js后