我认为路由器不具备切换标签的功能。您将必须更新evaluate()中的selectedIndex，然后导航到所需的特定标签。

要从子组件更新BottomNavigation，请使用带有selectedIndex的服务。从父级组件听主题，从子级组件更新值。

其中一条评论要求澄清如何为此目的使用BehaviorSubject，因此，我将发布此代码，以防将来对某人有所帮助。这将显示如何使用rxjs BehaviorSubject来监听制表符的更改，并提供一种使用此服务从应用程序内的任何地方更改BottomNavigation的当前选项卡的方法。

此服务的目的是提供一个中心位置，可在整个应用程序中访问BottomNavigation UI元素。它可以：

• 使用ElementRef中的BottomNavigation，以便可以访问nativeElement来获取或更改BottomNavigation元素的当前标签。
• 提供一个可观察的rxjs BehaviorSubject，允许该服务的使用者订阅BottomNavigation selectedIndexChanged事件，然后收到通知。在每个BottomNavigation newIndex事件中，都可以从此rxjs oldIndex发出BehaviorSubject和selectedIndexChanged。

注意：：在其模板中具有BottomNavigation元素的组件（在本示例中为app.component.ts）中，它必须为此{ {1}}在其NavigationService生命周期挂钩中对BottomNavigation的引用，例如：ngAfterViewInit （请参阅下面app.component.ts中的代码段）

this._navigationService.bottomNavigationRef = this.navRef;

// navigation.service.ts

import { ElementRef,Injectable,OnDestroy } from '@angular/core';

import { BottomNavigation,SelectedIndexChangedEventData } from '@nativescript/core';

import { BehaviorSubject,Subscription } from 'rxjs';

@Injectable({
  providedIn: 'root',})
export class NavigationService implements OnDestroy {
  private _bottomNavigationRef: ElementRef<BottomNavigation>;
  private _subscription: Subscription;
  private callbackSelIndexChgEv;
  /** rxjs BehaviorSubject observable to track the current tab of the BottomNavigation */
  bottomNavigationTab$: BehaviorSubject<{ newIndex: number; oldIndex: number }>;

  constructor() {
    // Must initialize rxjs BehaviorSubject observable with initial value.
    this.bottomNavigationTab$ = new BehaviorSubject({
      newIndex: -1,oldIndex: -1,});

    // Logs the current tab per this service.
    this._subscription = this.bottomNavigationTab$.subscribe((value) => {
      console.log(
        `NavigationService -> The BottomNavigation current tab index is now:
            newIndex: "${value.newIndex}"
            oldIndex: "${value.oldIndex}"`
      );
    });
  }

  ngOnDestroy(): void {
    this._subscription.unsubscribe();
    this._bottomNavigationRef.nativeElement.off(
      BottomNavigation.selectedIndexChangedEvent,this.callbackSelIndexChgEv
    );
  }

  get bottomNavigationRef(): ElementRef<BottomNavigation> {
    return this._bottomNavigationRef;
  }

  set bottomNavigationRef(bottomNavRef: ElementRef<BottomNavigation>) {
    this._bottomNavigationRef = bottomNavRef;

    this.callbackSelIndexChgEv = (
      $event: SelectedIndexChangedEventData
    ): void => {
      /* Update the current tab of the rxjs BehaviorSubject Observable */
      this.bottomNavigationTab$.next({
        newIndex: $event.newIndex,oldIndex: $event.oldIndex,});
    };

    this._bottomNavigationRef.nativeElement.on(
      BottomNavigation.selectedIndexChangedEvent,this.callbackSelIndexChgEv
    );
  }
}

// app.component.ts (partial file)

// ...
 @ViewChild('bottomNav') navRef: ElementRef<BottomNavigation>;
// ...
ngAfterViewInit(): void {
    // Gives the NavigationService the reference to the BottomNavigation it needs.
    this._navigationService.bottomNavigationRef = this.navRef;
}
// ...

<!-- app.component.html (partial file just to show #bottomNav) -->
<BottomNavigation #bottomNav>
<!-- ... -->
</BottomNavigation>

rxjs // another.component.ts import { Component,OnDestroy,OnInit } from '@angular/core'; import { Subscription } from 'rxjs'; import { NavigationService } from './navigation.service'; @Component({ selector: 'app-another-component',templateUrl: './another.component.html',styleUrls: ['./another.component.scss'] }) export class AnotherComponent implements OnDestroy,OnInit { private _subscription: Subscription; constructor(private _navigationService: NavigationService) {} ngOnInit(): void { // Example using BehaviorSubject Observable: this._subscription = this._navigationService.bottomNavigationTab$.subscribe( (selectedTab) => { console.log(`This component knows that the BottomNavigation current tab is now: ${selectedTab.newIndex} and the old tab was: ${selectedTab.oldIndex}`); if (selectedTab.newIndex === 2) { // do something ... } } ); } ngOnDestroy(): void { // unsubscribe from BehaviorSubject Observable this._subscription.unsubscribe(); } // Example changing the BottomNavigation tab from another component: changeTab(tab: number): void { this._navigationService.bottomNavigationRef.nativeElement.selectedIndex = tab; } } 文档：https://www.learnrxjs.io/learn-rxjs/subjects/behaviorsubject

尝试一下：

您需要从 this.activatedRoute 中删除navigate()，后者是在当前提供的路由路径之前分配当前路由。

 this.router.navigate(['../tabs/feed',{
       outlets: {  primary: ['feed'],feedTab: ['feed'] }
    }
 ])

您可以阅读有关outlets here的更多信息，并关注此博客以获取更多details。

希望这会有所帮助..：）