通过检查用户是否使用angular api登录来验证组件页面

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

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

  canActivate(
    next: ActivatedRouteSnapshot,
    state: RouterStateSnapshot): Observable<boolean | UrlTree> | Promise<boolean | UrlTree> | boolean | UrlTree {
    if (this.authService.isLoggedIn()) {
      return true;
    } else {
      // 如果用户未登录，则重定向到登录页面
      this.router.navigate(['/login']);
      return false;
    }
  }
}

import { Injectable } from '@angular/core';

@Injectable({
  providedIn: 'root'
})
export class AuthService {
  private loggedIn = false;

  constructor() {}

  login() {
    // 执行登录操作，例如向服务器发送登录请求
    this.loggedIn = true;
  }

  logout() {
    // 执行注销操作，例如向服务器发送注销请求
    this.loggedIn = false;
  }

  isLoggedIn() {
    return this.loggedIn;
  }
}

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

const routes: Routes = [
  { path: '', component: HomeComponent },
  { path: 'profile', component: ProfileComponent, canActivate: [AuthGuard] },
];

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