小程序中解决onLunch()函数的异步

  getAuthKey: function () {
    console.log("method")
     var that = this;
     return new Promise((resolve,reject)=>{
       //调用登录接口
       wx.login({
         success: function (res) {
           var code = res.code// 登录凭证
           console.log(code, "code码")
           that.globalData.code = code

           wx.getUserInfo({
             success: function (res2) {
               // that.globalData.userInfo = res.userInfo
               typeof cb == "function" && cb(that.globalData.userInfo)
               that.globalData.userInfo = res2.userInfo
               // that.globalData.userInfo2 = res2.userInfo.avatarUrl
               console.log("用户信息", res2)
               wx.request({
                 url: getApp().globalData.url + ‘ywxlogincontroller/login‘,
                 header: {
                   ‘content-type‘: ‘application/x-www-form-urlencoded‘
                 },
                 method: "POST",
                 data: {
                   code: getApp().globalData.code,
                   key: "keyA965C612A7366F79B847AF301E65C5C6",
                 },
                 success: res => {             
                   wx.hideLoading()
                   console.log(getApp().globalData.code, "后台数据", res.data)
                   getApp().globalData.userData = res.data.data;
                   getApp().globalData.userId = res.data.data.user.id;
                   if (res.data.data) {
                     wx.switchTab({
                       url: ‘../index/index‘,
                       success: () => {
                         wx.showToast({
                           title: ‘登录成功‘,
                         })
                         console.log("登录成功", getApp().globalData.userData)
                       },
                     })
                   } else {
                     wx.showToast({
                       title: ‘登录失败‘,
                       icon: "none"
                     })
                   }
                   resolve(res);
                 }
               })
             },
             fail: function () {
               reject(‘error‘);
             }
           })
         }
       })
     })
  }

const app = getApp()
 app.getAuthKey().then(res=>{
   // 这里就可以在onlunch函数执行完后，在这里等待拿到所需要的值。
}）