如果在Angular应用程序中有多个模块，我们需要一次又一次地加载权限吗？

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

@Injectable({
  providedIn: 'root'
})
export class AuthGuard implements CanActivate {
  constructor(private router: Router) {}

  canActivate(
    next: ActivatedRouteSnapshot,
    state: RouterStateSnapshot): Observable<boolean | UrlTree> | Promise<boolean | UrlTree> | boolean | UrlTree {
    // 在这里进行权限检查逻辑
    const hasPermission = ...; // 检查用户是否有权限

    if (hasPermission) {
      return true; // 允许访问
    } else {
      // 没有权限，重定向到其他页面或显示提示信息
      this.router.navigate(['/unauthorized']);
      return false;
    }
  }
}

import { NgModule } from '@angular/core';
import { Routes, RouterModule } from '@angular/router';
import { HomeComponent } from './home.component';
import { AdminComponent } from './admin.component';
import { AuthGuard } from './auth.guard';

const routes: Routes = [
  { path: 'home', component: HomeComponent },
  { path: 'admin', component: AdminComponent, canActivate: [AuthGuard] },
  // 其他路由配置...
];

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