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我测试用户允许授权为什么不能直接获取用户信息?

	// var utils = require('../../utils/util.js');
//self.js 个人中心首页
//获取应用实例
var app = getApp()
Page({
    data: {
        userInfonull,
        certificationOknull,
        avatarUrl'',
    userInfo: {},
    loggedfalse,
    takeSessionfalse,
    requestResult'',
    username:''
    },


    onPullDownRefresh :function(){
        utils.getUserData();
        wx.stopPullDownRefresh()
    },
    
    onLoadfunction (options{
        var that = this;
        wx.getSetting({
            successres => {
              if (res.authSetting['scope.userInfo']) {
                // 已经授权,可以直接调用 getUserInfo 获取头像昵称,不会弹框
                console.log("已经授权");
                wx.getUserInfo({
                  successres => {
                    console.log(res);
                    this.setData({
                      avatarUrl: res.userInfo.avatarUrl,
                      userInfo: res.userInfo,
                      username:res.userInfo.nickName
                    })
                  }
                })
              }else{
                  console.log("未授权");
              }
            }
          })
        
    },
    
    onReady:function(){
        var that = this;
        if (that.data.userInfo){
            if (that.data.certificationOk == 0){
                wx.showModal({
                    title'认证提醒',
                    content'您还没有认证',
                    cancelText"下次再说",
                    cancelColor"",
                    successfunction (res{
                        if (res.confirm) {
                            wx.navigateTo({
                                url'../toAuth/toAuth',
                            })
                        } else if (res.cancel) {
                            console.log('用户点击取消')
                        }
                    }
                })
            }
            
        }
    },
    onShowfunction () {
        var that = this;
        console.log(that+"==================")
        // utils.checkSettingStatu(that);
    },
    //事件处理函数
    bindViewTapfunction () {
        wx.navigateTo({
            url'../logs/logs'
        })
    },


    login:function(e){
        //认证信息及个人信息切换
        
        var that = this;
        console.log(that);
        console.log(e);
        console.log(this.data.logged);
        console.log(e.detail.userInfo);
        wx.getSetting({
            successres => {
              if (res.authSetting['scope.userInfo']) {
                // 已经授权,可以直接调用 getUserInfo 获取头像昵称,不会弹框
                console.log("已经授权");
                wx.getUserInfo({
                  successres => {
                    console.log(res);
                    this.setData({
                      avatarUrl: res.userInfo.avatarUrl,
                      userInfo: res.userInfo,
                      username:res.userInfo.nickName
                    })
                  }
                })
              }else{
                  console.log("未授权");
              }
            }
          })
//         wx.getUserInfo({
//             complete: (res) => {
//                 console.log(res);
//     if (res.authSetting['scope.userInfo']) {
//         this.setData({
//             logged: true,
//             avatarUrl: res.detail.userInfo.avatarUrl,
//             userInfo: res.detail.userInfo,
//             username:res.detail.userInfo.nickName
//           })
//           wx.navigateTo({
//             url: '../toAuth/toAuth',
//           })
       
//       }else{
//             console.log(已授权);
//       }
          
//     },
// })
    },
        // if (that.data.certificationOk == 2){
        //     //个人信息页面
        //     wx.navigateTo({
        //         url: '../selfInfo/selfInfo',
        //     })
        // }else{
        //     //去认证页面
        //     wx.navigateTo({
        //         url: '../toAuth/toAuth',
        //     })
        // }
        
// },


    openAccountfunction (event{
        //打开我的账户
        wx.navigateTo({
            url'../myAccount/myAccount',
        })
    },


    openBookList:function(event){
        //打开个人中心图书列表
        var index = event.currentTarget.dataset.index;
        wx.navigateTo({
            url'../bookList/bookList?index=' + index,
        })
    },


    //自营点上传图书
    uploadPilotfunction () {
        wx.navigateTo({
            url'../zcone/zcone'
        })
    },



    openOpinion:function(){
        //打开意见反馈
        wx.navigateTo({
            url'../opinion/opinion',
        })
    },


    aboutUs:function(){
        //打开关于我们
        wx.navigateTo({
            url'../aboutUs/aboutUs',
        })
    },


    openSetting:function(){
        wx.navigateTo({
            url'../setting/setting',
        })
    },


    openCards:function(){
        wx.navigateTo({
            url'../card/card',
        })
    }
})


当我点击授权按钮的时候执行的是

login:function(e){
        //认证信息及个人信息切换
        
        var that = this;
        console.log(that);
        console.log(e);
        console.log(this.data.logged);
        console.log(e.detail.userInfo);
        wx.getSetting({
            successres => {
              if (res.authSetting['scope.userInfo']) {
                // 已经授权,可以直接调用 getUserInfo 获取头像昵称,不会弹框
                console.log("已经授权");
                wx.getUserInfo({
                  successres => {
                    console.log(res);
                    this.setData({
                      avatarUrl: res.userInfo.avatarUrl,
                      userInfo: res.userInfo,
                      username:res.userInfo.nickName
                    })
                  }
                })
              }else{
                  console.log("未授权");
              }
            }
          })
z这个login函数,但是每次授权都得重新进一次页面才能获取用户信息,这是为什么,顺便问一下{{userInfo.nickName?userInfo.nickName:"点击授权登录"}}这个意思是
z这个变量不为空就显示变量,变量为空就显示点击授权登录?,劳烦解答一下,先谢谢大佬们了


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