这是我的方法，特别适用于嵌套路由:

Here's my approach which works fine, especially for nested routes:

路线更改后，我使用递归帮助器方法来获取最深的可用标题:

I use a recursive helper method to grab the deepest available title after a route has changed:

@Component({
  selector: 'app',
  template: `
    <h1>{{title}}</h1>
    <router-outlet></router-outlet>
  `
})
export class AppComponent implements OnInit {
  constructor(private router: Router) {}

  title: string;

  private getDeepestTitle(routeSnapshot: ActivatedRouteSnapshot) {
    var title = routeSnapshot.data ? routeSnapshot.data['title'] : '';
    if (routeSnapshot.firstChild) {
      title = this.getDeepestTitle(routeSnapshot.firstChild) || title;
    }
    return title;
  }

  ngOnInit() {
    this.router.events.subscribe((event) => {
      if (event instanceof NavigationEnd) {
        this.title = this.getDeepestTitle(this.router.routerState.snapshot.root);
      }
    });
  }
}

这是假设您已经在路线的data属性内分配了页面标题，如下所示:

This is assuming, that you have assigned page titles within the data property of your routes, like this:

{
  path: 'example',
  component: ExampleComponent,
  data: {
    title: 'Some Page'
  }
}