我想用存储区中的数据填充表单，但无论我尝试什么（setValue、patchValue），表单仍然是空的

export class MyComponent implements OnInit, OnDestroy {
 public newsletterToEdit$: Observable<NewNewsletter> =
    this.store.selectNewsletterToEdit();

 public form = this.fb.group({
    title: ['', Validators.required],
    subtitle: ['', Validators.required],
    message: ['', Validators.required],
    users: [''],
    groups: [''],
    searchedUsers: [''],
    searchedGroups: [''],
    allowReplies: [false, Validators.required],
    replyFrom: ['NONE'],
  });

ngOnInit(): void {

//这个.newMessageForm.控件['标题'].setValue（'测试标题'）;- 〉这是可行的，它用字符串

this.newsletterToEdit$.pipe(
      tap((newsletter) => {
        console.log('newsletter to edit: ', newsletter);

        // this.newMessageForm.patchValue(newsletter) -> another try
        this.form.setValue({
          title: newsletter.title,
          allowReplies: null,
          groups: newsletter.sentToGroupCode[0],
          message: newsletter.message,
          replyFrom: 'NONE',
          searchedGroups: '1',
          searchedUsers: '2',
          subtitle: newsletter.subtitle,
          users: '3',
        });
      })
    );
}
}

我已经检查过了，我确实在存储中有数据，但似乎从未记录控制台日志，因此这意味着未调用管道（tap（））