暂停重定向直到函数返回(Angular/HTML)

import { Injectable } from '@angular/core';
import { CanActivate, Router } from '@angular/router';
import { Observable } from 'rxjs';

@Injectable()
export class RedirectGuard implements CanActivate {
  constructor(private router: Router) {}

  canActivate(): Observable<boolean> | Promise<boolean> | boolean {
    // 执行需要暂停重定向的函数
    return new Observable<boolean>(observer => {
      // 异步操作完成后调用observer.next(true)表示可以进行重定向
      // 或者调用observer.next(false)表示不进行重定向
      // 最后调用observer.complete()结束Observable
    });
  }
}

import { NgModule } from '@angular/core';
import { Routes, RouterModule } from '@angular/router';
import { RedirectGuard } from './redirect.guard';

const routes: Routes = [
  { path: 'example', canActivate: [RedirectGuard], component: ExampleComponent },
  // 其他路由配置...
];

@NgModule({
  imports: [RouterModule.forRoot(routes)],
  exports: [RouterModule]
})
export class AppRoutingModule { }