我不断收到 "Property subscribe does not exist on type void " 的错误

Question

这是我的 ts 文件函数，它抛出错误

post-list.componenet.ts



ngOnInit() {
  this.posts = this.postsService.getPosts();
  this.postsSub = this.postsService.getPostUpdateListener()
    .subscribe((posts: Post[]) => {
      this.posts = posts});
}


}

这是一个服务文件

@Injectable({providedIn: 'root'})
export class PostsService {
  private posts: Post[] = [];
  private postsUpdated = new Subject<Post[]>();

  getPosts() {
    return [...this.posts];
  }

  getPostUpdateListener(){
    this.postsUpdated.asObservable();
  }

  addPosts(title: string, content: string) {
    const post: Post = {title:  title, content: content};
    this.posts.push(post);
    this.postsUpdated.next([...this.posts]);
  }
}

我已经导入了 'rxjs' 依赖模块，但我似乎无法确定如何更正错误。代码在浏览器上运行，但我没有得到所需的输出

Answer 1

不要忘记 return 您的数据到您的 getPostUpdateListener()

getPostUpdateListener(){
   return this.postsUpdated.asObservable();
  }

我不断收到 "Property subscribe does not exist on type void " 的错误

I keep getting error of "Property subscribe does not exist on type void "

angular

angular-material

observable

subscription

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