属性 'authState' 在 ionic 2 应用中的类型 'AngularFireAuth' 上不存在

Question

我正在尝试使用 firebase 的 AngularFire2 进行 facebook 身份验证。我遵循与本教程完全相同的步骤 github.com/angular/angularfire2/blob/master/docs/Auth-with-Ionic2.md

但由于某种原因，这不起作用。它给我提供者页面上的许多错误。这是我的代码。

import { Injectable } from '@angular/core';
import { Component } from '@angular/core';
import { Http } from '@angular/http';
import 'rxjs/add/operator/map';
import { Observable } from 'rxjs/Observable';
import { AngularFireAuth } from 'angularfire2/auth';
import * as firebase from 'firebase/app';


@Injectable()
export class AuthService {
     private authState: Observable<firebase.User>;
     private currentUser: firebase.User;

     constructor(public http: Http, public afAuth: AngularFireAuth) {
     console.log('Hello AuthService Provider');
     this.authState = afAuth.authState; //First error here.
     afAuth.subscribe((user: firebase.User) => { //second here
     this.currentUser = user;
      });
}

  get authenticated(): boolean {
    return this.currentUser !== null;
  }

  signInWithFacebook(): firebase.Promise<any> {
     return this.afAuth.auth.signInWithPopup(new firebase.auth.FacebookAuthProvider()); //third error here
      }

  signOut(): void {
    this.afAuth.signOut();
  }

  displayName(): string {
    if (this.currentUser !== null) {
      return this.currentUser.facebook.displayName;
       } else {
       return '';
       }
   }
}

错误

Property 'authState' does not exist on type 'AngularFireAuth'.

Argument of type '(user: User) => void' is not assignable to parameter of type '(value: FirebaseAuthState) => void'. 
Types of parameters 'user' and 'value' are incompatible. 
Type 'FirebaseAuthState' is not assignable to type 'User'. 
Property 'delete' is missing in type 'FirebaseAuthState'.

Property 'auth' does not exist on type 'AngularFireAuth'.

我是 angular 和 ionic 的新手，请在这里指导我，或者导航到一个好的教程

Answer 1

我通过重新安装 Firebase 和 AngularFire2 解决了这个问题：

npm uninstall angularfire2 --save
npm uninstall firebase --save
npm install angularfire2 firebase --save

更新：

npm install firebase @angular/fire --save

Answer 2

现在已弃用最后一行更正的答案

npm install firebase @angular/fire --save

属性 'authState' 在 ionic 2 应用中的类型 'AngularFireAuth' 上不存在

Property 'authState' does not exist on type 'AngularFireAuth' in ionic 2 app

angularjs

firebase

firebase-authentication

ionic2

angularfire2