如何在angular中访问组件类中可观察到的对象值？

import { BehaviorSubject } from 'rxjs';

export class MyComponent {
  private dataSubject = new BehaviorSubject<string>('initial value');
  data$ = this.dataSubject.asObservable();

  // ...
}

<p>{{ data$ | async }}</p>

export class MyComponent {
  // ...

  someMethod() {
    this.data$.subscribe(value => {
      console.log(value); // 输出可观察对象的值
    });
  }

  // ...
}