在 angular 8 中隐藏导航栏（在 routes.event 中不记录 auth-guard 路由）

Question

全部，

在实施 auth guard 之前，我能够在登录和注册屏幕中隐藏我的导航栏。通过读取 component.ts 中的路由事件并通过 ngIf 隐藏导航栏。在我实施 auth guard 之后，auth guard 到登录页面的路由没有隐藏下面的导航栏是我的代码..

在这里，我的 auth guard 服务将检查用户是否通过 auth 服务（将从 cognito 获取数据）进行身份验证。现在，我怎样才能从 auth guard 发生的路线中隐藏导航栏。请帮忙

app.component.html

<app-toolbar *ngIf="isShowNavbar"   ></app-toolbar>

<router-outlet></router-outlet>

app.component.ts

import { Component,OnInit } from '@angular/core';
import {AuthorizationService} from "./authorization.service";
import { Router, ActivatedRoute, UrlSegment, NavigationEnd } from '@angular/router';
import { Observable } from 'rxjs';
import { first, distinctUntilChanged, throttleTime } from '../../node_modules/rxjs/operators';
@Component({
  // tslint:disable-next-line: component-selector
  selector: 'my-app',
  templateUrl: './app.component.html',
  styleUrls: [ './app.component.css' ]
})
export class AppComponent implements OnInit  {

  isLoggedIn$: Observable<boolean>;
  isShowNavbar: boolean;
  constructor(private auth: AuthorizationService,private router: Router) {}
  ngOnInit() {
    this.isLoggedIn$ = this.auth.IsLoggedIn;
    this.router.events.pipe(throttleTime(100), distinctUntilChanged()).subscribe((navEnd: NavigationEnd) => {
      console.log(navEnd.url)
      if (navEnd) {
        if (navEnd.url === "/login" || navEnd.url ==="/register" ) {
          this.isShowNavbar = false
        } else {
          this.isShowNavbar = true;
        }
      }
    });
  }}

route.ts

const routes: Routes = [
  {path: '', redirectTo: '/cards', pathMatch: 'full',canActivate :  [ AuthGuardService ] },
  { path: 'shareditems', component: ShareditemsComponent,canActivate :  [ AuthGuardService ] },
  { path: 'home', component: AppCardsComponent,canActivate :  [ AuthGuardService ]  },
  { path: 'calendar', component: CalendarComponent,canActivate :  [ AuthGuardService ] },
  {path: 'lan', component: LanComponent,canActivate :  [ AuthGuardService ] },
  {path:'login', component:LoginComponent},
  {path: 'register', component:RegisterComponent },
  {path:'nav', component:CommonComponent,canActivate :  [ AuthGuardService ] }

];

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

auth.guard 服务：

canActivate(next: ActivatedRouteSnapshot, state: RouterStateSnapshot): Promise<boolean>
{ 
    return this.auth.isAuthenticated() 
      .then(data => { 
          return Promise.resolve(true); 
        }).catch(err => { 
           this._router.navigate(['/login']); 
           return Promise.resolve(false); 
        }); 
       } 
}

Answer 1

我不会根据当前 URL 显示或隐藏您的工具栏，而是构建您的路线并使用布局组件。

认证-layout.component.html

<app-toolbar></app-toolbar>
<router-outlet></router-outlet>

匿名-layout.component.html

<router-outlet></router-outlet>

您可以使用子路由继承这些布局（和 auth guard）。

route.ts

const routes: Routes = [
  { path: '', component: AuthenticatedLayoutComponent, canActivate : [ AuthGuardService ], 
    children: [
    { path: '', redirectTo: '/cards', pathMatch: 'full' },
    { path: 'shareditems', component: ShareditemsComponent },
    { path: 'home', component: AppCardsComponent },
    { path: 'calendar', component: CalendarComponent },
    { path: 'lan', component: LanComponent },  
    { path:'nav', component: CommonComponent }
  ] },
  { path: '', component: AnonymousLayoutComponent, children: [
    { path:'login', component: LoginComponent},
    { path: 'register', component: RegisterComponent },
  ] }
];

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

演示：https://stackblitz.com/edit/angular-jzmw3d

备选

最终，您的逻辑是您只想在用户登录时显示导航栏。您可以通过订阅您的身份验证服务来设置可见性。

app.component.ts

export class AppComponent implements OnInit  {

  isLoggedIn$: Observable<boolean>;
  isShowNavbar: boolean;

  constructor(private auth: AuthorizationService,private router: Router) {}

  private destroyed$ = new Subject();

  ngOnInit() {
    this.isLoggedIn$ = this.auth.IsLoggedIn;
    this.isLoggedIn$.pipe(
      takeUntil(this.destroyed$)
    ).subscribe(isLoggedIn => {
      this.isShowNavbar = isLoggedIn;
    });
  }

  ngOnDestroy() {
    this.destroyed$.next();
    this.destroyed$.complete();
  }
}

不过，我仍然建议在父路由中使用带有单个身份验证保护的子路由。

此外，如果您想指示路由器导航到新路线，我建议从 canActivate 返回 UrlTree。

auth-guard.service.ts

canActivate (next: ActivatedRouteSnapshot, state: RouterStateSnapshot
): Promise<boolean | UrlTree> { 
  return this.auth.isAuthenticated() 
    .then(data => { 
      return Promise.resolve(true); 
    }).catch(err => { 
      const urlTree = this._router.parseUrl('/login');
      return Promise.resolve(urlTree); 
    }); 
  };
}

在 angular 8 中隐藏导航栏（在 routes.event 中不记录 auth-guard 路由）

Hide the navbar in angular 8 (auth-guard routes are not recorded in routes.event)

angular-routing

angular

auth-guard

angular-guards

angular8

备选