在没有authguard的情况下，在Angular 7中禁用url更改导航或直接页面访问？

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

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

  canActivate(next: ActivatedRouteSnapshot, state: RouterStateSnapshot): boolean {
    if (!isLoggedIn) { // 根据你的认证逻辑判断用户是否已经登录
      this.router.navigate(['/login']); // 重定向到登录页面
      return false;
    }
    return true;
  }
}

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

const routes: Routes = [
  {
    path: 'dashboard',
    canActivate: [AuthGuard], // 应用路由守卫
    loadChildren: () => import('./dashboard/dashboard.module').then(m => m.DashboardModule)
  },
  // 其他路由配置...
];

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