未捕获（承诺）：错误：没有AngularFireAuth的提供者

We are tried login with google authentication using (Firebase/ionic2/angularjs2).Our code

我们尝试使用google身份验证登录（Firebase / ionic2 / angularjs2）。我们的代码

 import { Component } from '@angular/core';
import { NavController } from 'ionic-angular';
import { Observable } from 'rxjs/Observable';
import { AngularFireAuth } from 'angularfire2/auth';
import * as firebase from 'firebase/app';

@Component({
  selector: 'page-home',
  templateUrl: 'home.html'
})
export class HomePage {
   user: Observable<firebase.User>;
  constructor(public navCtrl: NavController,public afAuth: AngularFireAuth) {
    this.user = afAuth.authState;
  }
  login() {
    this.afAuth.auth.signInWithPopup(new firebase.auth.GoogleAuthProvider());
  }

  logout() {
    this.afAuth.auth.signOut();
  }
}

but we are getting error :

但我们收到错误：

Error: Uncaught (in promise): Error: No provider for AngularFireAuth!
Error: No provider for AngularFireAuth!

Please guide to us what working in our code .

请指导我们在代码中使用的内容。

3 个解决方案

#1

A clarification of what @rmalviya suggested, I assume you are currently on Ionic version 3.x.x, for this version you have two ways of importing a native plugin and adding the respective providers for the plugin.

澄清@rmalviya建议的内容，我假设您目前使用的是Ionic版本3.x.x，对于此版本，您有两种方法可以导入本机插件并为插件添加相应的提供程序。

1) You could add the provider in your current page typescript file. like so:

1）您可以在当前页面打字稿文件中添加提供程序。像这样：

  import { AngularFireAuth } from 'angularfire2/auth';

  ...

  @Component({
    selector: 'page-home',
    templateUrl: 'home.html',
    providers: [AngularFireAuth]
  })

2) Second method you could import it in your app.modules.ts and add the plugin into the providers

2）您可以在app.modules.ts中导入它的第二种方法，并将插件添加到提供程序中

 import { AngularFireAuth } from 'angularfire2/auth';

 ...

 providers: [
   StatusBar,
   SplashScreen,
   {provide: ErrorHandler, useClass: IonicErrorHandler},
   AngularFireAuth
 ]

#2

resolve here https://github.com/iglewski/Annotator/issues/3

解决这里https://github.com/iglewski/Annotator/issues/3

app.component.spec.ts :

app.component.spec.ts：

import { FirebaseApp, FirebaseAppConfig, AngularFireModule } from 'angularfire2';
import { AngularFireAuth, AngularFireAuthModule } from 'angularfire2/auth';
import { AngularFireDatabaseModule } from 'angularfire2/database';
import * as firebase from 'firebase/app';
import { firebaseConfig } from './app.module';
describe('AppComponent', () => { 
  beforeEach(async(() => {
    TestBed.configureTestingModule({
      declarations: [
        AppComponent
      ],
      imports: [
        AngularFireModule.initializeApp(firebaseConfig), //ajout
        AngularFireAuthModule, //ajout
        AngularFireDatabaseModule //ajout
      ],
    }).compileComponents();

  }));

#3

If you're using the IonicPageModule system, then you'll need to import AngularFireAuth in your app.module.ts AND in your page.module.ts in the providers array.

如果您正在使用IonicPageModule系统，那么您需要在您的app.module.ts和导入数组中的page.module.ts中导入AngularFireAuth。

app.module.ts:

app.module.ts：

@NgModule({
... 
 providers: [AngularFireAuth]
...

page.module.ts:

page.module.ts：

@NgModule({
  declarations: [
    SignupPage,
  ],
  imports: [
    IonicPageModule.forChild(SignupPage)
  ],
  exports: [
    SignupPage
  ],
  providers: [
    AngularFireAuth
  ]
})

#1