// 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: {
        userInfo: null,
        certificationOk: null,
        avatarUrl: '',
    userInfo: {},
    logged: false,
    takeSession: false,
    requestResult: '',
    username:''
    },

    onPullDownRefresh :function(){
        utils.getUserData();
        wx.stopPullDownRefresh()
    },
    
    onLoad: function (options) {
        var that = this;
        wx.getSetting({
            success: res => {
              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({
                  success: res => {
                    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: "",
                    success: function (res) {
                        if (res.confirm) {
                            wx.navigateTo({
                                url: '../toAuth/toAuth',
                            })
                        } else if (res.cancel) {
                            console.log('用户点击取消')
                        }
                    }
                })
            }
            
        }
    },
    onShow: function () {
        var that = this;
        console.log(that+"==================")
        // utils.checkSettingStatu(that);
    },
    //事件处理函数
    bindViewTap: function () {
        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({
            success: res => {
              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({
                  success: res => {
                    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',
        //     })
        // }
        
// },

    openAccount: function (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
    uploadPilot: function () {
        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({
            success: res => {
              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({
                  success: res => {
                    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