<button open-type="getUserInfo" bindgetuserinfo="bindGetUserInfo" class="cu-btn round bg-green shadow lg">登录</button>

  bindGetUserInfo: function (e) {
    if(!this.data.readed){
      wx.showToast({
        icon:"none",
        title: '请先阅读用户协议',
      })
      return
    }
    if (!e.detail.userInfo) {
      return;
    }
    wx.setStorageSync('userInfo', e.detail.userInfo)
    this.login(e.detail);
  },
login: function (detail) {
    var requestUrl =  app.globalData.baseUrl
    let that = this; 
    this.setData({
      loadModal: true
    })
    wx.login({
      success: function (res) {
        wx.request({
          url: requestUrl + '/wx/user/'+app.globalData.appkey+'/login',
          method: "POST",
          header:{
            "Content-Type": "application/json"
         },
          data: {
            code: res.code,
            encryptedData:  detail.encryptedData,
            signature:detail.signature,
            rawData:detail.rawData,
            encryptedData:detail.encryptedData,
            iv:detail.iv
          },
          success: function (res) {
            that.setData({
              loadModal: false
            })
            if(res && res.data && res.data.success){
             //成功后续代码
            }else{
           
            }
          }
        })
      }
    })
  },

第一次大概率返回报错：

Expected BEGIN_OBJECT but was STRING at line 1 column 1 path $

再点击又直接成功了