使用Ionic获取angularfire2中的当前用户数据

我正在搜索如何使用服务来获取用户的数据

users.services.ts

import { AngularFire, AuthProviders, AuthMethods, FirebaseListObservable}     


export class Users {
   uid :string = '8fbEOShqIigfA4u84cyvJcLkv5u1';

    constructor(public af: AngularFire) {}

    getUserObservable(){
        return this.af.database.object('/users/' + this.uid);
    }
}

在这里我的家

import { Users } from '../../services/users.service';

@Component({
  selector: 'page-home',
  templateUrl: 'home.html'
})
export class HomePage {
  user: any;
  isAuthenticated: boolean = true;

  constructor(private userService: Users) {}

  ngOnInit(){
    this.userService.getUserObservable().subscribe((userObject) => {
      this.user = userObject;
      console.log("result : ", this.user);
    });
  }

}

在控制台我得到:

result :  Object {imgLink: "blabla.jpg", money: 0, score: 0, uid: "8fbEOShqIigfA4u84cyvJcLkv5u1", username: "Luis Willnat"…}

但在离子视图中:

Cannot read property 'money' of undefined

我认为这是因为异步(我不能很好地练习),但不知道是什么......

非常感谢您的帮助 :)

您需要以不同方式设置代码.通常,当服务包装异步调用时 - 任何异步调用,而不仅仅是Firebase - 它的方法应该返回observable,而不是observable发出的值.

即使你想要,也不方便(或者可能)尝试返回包含在observable中的值,因为只有当observable发出时它们才可用,并且你无法控制它何时发生.

根据这些准则,您的代码将变为:

@Injectable()
export class UserService {
  constructor(public af: AngularFire) {}
  getUser() {
    // Return the observable. DO NOT subscribe here.
    return this.af.auth;
    // Hint: you could also transform the value before returning it:
    // return this.af.auth.map(authData => new User({name: authData.name}));
  }
}

ngOnInit() {
  this.userService.getUser()
    .subscribe(user => this.user = user);
}