wx.login({
      success(res) {
        if (res.code) {
          console.log(res.code)
          // 发起网络请求
          wx.request({
            url: \'https://api.weixin.qq.com/sns/jscode2session\',
            data: {
              appid:\'*******\',
              secret:\'*******\',
              js_code:res.code,
              grant_type: \'authorization_code\'
            },
            success:function(data){
              console.log(data);
            },
            fail:function(error){
                console.log(error);
            }
      
          })
        } else {
          console.log(\'登录失败！\' + res.errMsg)
        }
      }
    })