Question

我为getter和setter服务：

// Service
import { Subject } from 'rxjs';

export class MyService {
  public currentUser: any = new Subject();

  ... there is a function where I call setCurrent and assign value

  set setCurrent(data: any) {
    this.currentUser.next(data);
    this._localStorage.set('user', JSON.stringify(data))
  }

  get setCurrent() {
    return this._localStorage.get('user');
  }
}

在我的组件中，我订阅了currentUser：

// Component


  public user: User;

  constructor(
    public authService: AuthService,
  ) {
    this.authService.currentUser.subscribe(nextData => {
      this.user = nextData;
      console.log(nextData) // Expected value, it's here
      console.log(this.user) // Undefined
    })
  }

为什么返回所需和期望值，但未将其分配给组件变量？

Answer 1

您何时设置setCurrent？如果您在订阅之前执行此操作，则不会获得当前值。您可以尝试将其更改为BehaviorSubject而不是Subject。

订阅主题未分配值

1 个答案: