[英]Angular 2 - Content not loading in router outlet
我对Angular 2还很陌生,希望你们能帮助我。
我有一个相当简单的应用程序,有一个登录页面,成功登录后,用户被定向到一个带有侧面菜单的页面。 登录屏幕没有此侧面菜单。 当用户注销时,他将再次被定向到登录页面。
问题是登录后侧面菜单变得可见,但其他内容仅在刷新后可见。 退出后,退出页面为空白后,只有在刷新后才会显示内容(登录页面)。 我可能做错了什么,但即使看了其他问题,我也无法弄明白。
这是我的路线:
import { NgModule } from '@angular/core';
import { RouterModule, Routes } from '@angular/router';
import { ProfileComponent } from './profile-component/profile-component.component'
import { PageNotFoundComponent } from './page-not-found/page-not-found.component';
import { LoginComponent } from './login/login.component';
import { LoggedInGuard } from './logged-in/logged-in.guard';
const appRoutes: Routes = [
{path: 'profile', component: ProfileComponent, canActivate: [LoggedInGuard]},
{path: 'login', component: LoginComponent},
{path: '', component: LoginComponent},
{path: '**', component: PageNotFoundComponent},
];
@NgModule({
imports: [
RouterModule.forRoot(appRoutes)
],
exports: [
RouterModule
]
})
export class AppRoutingModule {
}
LoginComponent
:
import {Component, OnInit} from '@angular/core';
import {FormBuilder, FormGroup, Validators} from '@angular/forms';
import {LoginService} from '../login-service/login-service.service';
import {Router} from '@angular/router';
@Component({
selector: 'app-login',
templateUrl: './login.component.html',
styleUrls: ['./login.component.scss'],
providers: [ LoginService ]
})
export class LoginComponent implements OnInit {
loginForm: FormGroup;
error: String;
constructor(private formBuilder: FormBuilder,
private loginService: LoginService,
private router: Router) {
}
ngOnInit() {
if (this.loginService.isLoggedIn()) {
this.router.navigate(['/profile']);
}
this.loginForm = this.formBuilder.group({
username: ['', Validators.required],
password: ['', Validators.required]
});
}
login(): void {
let self = this;
this.loginService.login(this.loginForm.value.username, this.loginForm.value.password).subscribe(function (result) {
if (result) {
self.router.navigate(['/profile']);
}
}, function (error) {
self.error = 'Invalid';
});
}
}
AppComponent
HTML如下所示:
<md-toolbar color="primary" *ngIf="isLoggedIn()">
<span>Sporter volgsysteem</span>
</md-toolbar>
<md-sidenav-layout *ngIf="isLoggedIn()">
<md-sidenav #start mode="side" [opened]="true">
<a routerLink="/add" routerLinkActive="active" md-button color="primary" disabled="false"><md-icon class="icon">add</md-icon><span class="nav-item">Toevoegen</span></a>
<a routerLink="/compare" routerLinkActive="active" md-button color="primary"><md-icon class="icon">swap_horiz</md-icon><span class="nav-item">Vergelijken</span></a>
<a routerLink="/search" routerLinkActive="active" md-button color="primary"><md-icon class="icon">search</md-icon><span class="nav-item">Zoeken</span></a>
<a routerLink="/profile" routerLinkActive="active" md-button color="primary"><md-icon class="icon">account_box</md-icon><span class="nav-item">Profiel</span></a>
<a routerLink="/feedback" routerLinkActive="active" md-button color="primary"><md-icon class="icon">feedback</md-icon><span class="nav-item">Feedback</span></a>
<a routerLink="/faq" routerLinkActive="active" md-button color="primary"><md-icon class="icon">info</md-icon><span class="nav-item">FAQ</span></a>
<div class="spacer"></div>
<a md-button color="primary" routerLink="/login" (click)="logout()"><md-icon class="icon">exit_to_app</md-icon><span class="nav-item">Uitloggen</span></a>
</md-sidenav>
<router-outlet></router-outlet>
</md-sidenav-layout>
<router-outlet *ngIf="!isLoggedIn()"></router-outlet>
AppComponent
:
import {Component} from '@angular/core';
import {LoginService} from "./login-service/login-service.service";
import {Router } from '@angular/router'
@Component({
selector: 'app-root',
templateUrl: './app.component.html',
styleUrls: ['./app.component.scss'],
providers: []
})
export class AppComponent {
constructor(private loginService : LoginService,
private router: Router) {
}
logout() {
this.loginService.logout();
this.router.navigate(['/login']);
}
isLoggedIn() {
return this.loginService.isLoggedIn();
}
}
那么,为什么不是内容ProfileComponent
登录后显示,为什么不注销后显示的登录页面,但都显示,当刷新?
更新
大多数人认为这是由于多个未命名的router-outlet
所以要验证我是否已经移除其中一个插座并始终显示侧面菜单布局。 当然是出于测试目的。 这没有解决问题,它给了我相同的行为:配置文件内容仅在刷新后加载。
更新2我猜这与使用*ngIf
显示router-outlet
根据@bhetzie和@ jaime-torres的上述评论和我自己的假设,我进一步调查。 事实证明,问题确实存在于双router-outlet
。
我的解决方案是提取一个LoginModule
模块,然后在该模块中重定向到登录页面。 在所有其他情况下,我路由到另一个名为SvsModule
模块,该模块使用侧面导航结构显示登录的内容。
所以SvsModule
有以下路由:
RouterModule.forChild([
{path: 'svs', component: ProfileComponent, canActivate:[LoggedInGuard]},
{path: 'svs/profile', component: ProfileComponent, canActivate:[LoggedInGuard]}
])
ProfileComponent使用以下HTML:
<md-sidenav-layout>
<md-sidenav #start mode="side" [opened]="true">
<md-nav-list>
<a routerLink="/add" routerLinkActive="active" md-button color="primary" disabled="false">
<md-icon class="icon">add</md-icon>
<span class="nav-item">Toevoegen</span>
</a>
<a routerLink="/compare" routerLinkActive="active" md-button color="primary">
<md-icon class="icon">swap_horiz</md-icon>
<span class="nav-item">Vergelijken</span>
</a>
<a routerLink="/search" routerLinkActive="active" md-button color="primary">
<md-icon class="icon">search</md-icon>
<span class="nav-item">Zoeken</span>
</a>
<a routerLink="/profile" routerLinkActive="active" md-button color="primary">
<md-icon class="icon">account_box</md-icon>
<span class="nav-item">Profiel</span>
</a>
<a routerLink="/feedback" routerLinkActive="active" md-button color="primary">
<md-icon class="icon">feedback</md-icon>
<span class="nav-item">Feedback</span>
</a>
<a routerLink="/faq" routerLinkActive="active" md-button color="primary">
<md-icon class="icon">info</md-icon>
<span class="nav-item">FAQ</span>
</a>
<div class="spacer"></div>
<a md-button color="primary" routerLink="/login" (click)="logout()">
<md-icon class="icon">exit_to_app</md-icon>
<span class="nav-item">Uitloggen</span></a>
</md-nav-list>
</md-sidenav>
<router-outlet></router-outlet>
</md-sidenav-layout>
我会接受这个作为答案,但感谢上述用户帮助我走上了我的道路。
我认为问题是双路由器出口,如上面的评论所示。 我在我的项目中做了类似的事情。
这是我的解决方案:
我首先创建了一个服务来确定登录的状态(我意识到事件发射器不是很好的做法,我正在努力将其更改为行为主题):
GlobalEventsManager
import { EventEmitter, Injectable } from '@angular/core';
@Injectable()
export class GlobalEventsManager {
public showNavBar: EventEmitter<boolean> = new EventEmitter<boolean>();
}
我为我的路由使用了authguard来检查登录令牌是否未过期。 我为此使用了angular2-jwt库
AuthGuard
import { Injectable } from '@angular/core';
import { Router, CanActivate, ActivatedRouteSnapshot, RouterStateSnapshot } from '@angular/router';
import { tokenNotExpired } from 'angular2-jwt';
import { GlobalEventsManager } from './GlobalEventsManager';
@Injectable()
export class AuthGuard implements CanActivate {
constructor(private router: Router, private globaleventsManager: GlobalEventsManager) {}
canActivate(next: ActivatedRouteSnapshot,
state: RouterStateSnapshot) {
if (tokenNotExpired('currentUser')) {
this.globaleventsManager.showNavBar.emit(true);
return true;
} else {
localStorage.removeItem('currentUser');
this.router.navigate(['/login']);
return false;
}
}
}
当用户使用我的登录组件登录时,我将GlobalEventsManager设置为true
登录
constructor(
private router: Router,
private authenticationService: AuthenticationService,
private globaleventsManager: GlobalEventsManager) { }
ngOnInit() {
// reset login status
this.authenticationService.logout();
this.globaleventsManager.showNavBar.emit(false);
}
login() {
this.loading = true;
this.authenticationService.login(this.model.username, this.model.password)
.subscribe( (result) => {
this.globaleventsManager.showNavBar.emit(true);
this.router.navigate(['/']);
在我的导航栏中,我订阅了GlobalEventsManager并为结果设置了一个布尔属性:
导航栏
import { Component } from '@angular/core';
import { Router } from '@angular/router';
import { NavActiveService } from '../../../services/navactive.service';
import { GlobalEventsManager } from '../../../services/GlobalEventsManager';
@Component({
moduleId: module.id,
selector: 'my-navbar',
templateUrl: 'navbar.component.html',
styleUrls:['navbar.component.css'],
})
export class NavComponent {
showNavBar: boolean = true;
constructor(private router: Router,
private globalEventsManager: GlobalEventsManager){
this.globalEventsManager.showNavBar.subscribe((mode:boolean)=>{
this.showNavBar = mode;
});
}
}
在我的导航栏HTML中,我现在可以创建两个导航栏,一个导航栏只有一个登录导航栏,当我的authguard注意到一个toekn已过期或用户未登录时,它会显示导航栏,只需登录作为选项。 登录后,GlobalEventsManager值将更改,并显示我登录的导航栏:
导航HTML
<div *ngIf="showNavBar">
//My logged in navbar
</div>
<div *ngIf="!showNavBar">
//navbar that just displays login as an option
</div>
将导航调用放在ngZone中 。 (Angular 5)
import { NgZone } from "@angular/core";
import { Router } from "@angular/router";
constructor(
private ngZone: NgZone,
private router: Router
) {}
...
this.ngZone.run( () => {
this.router.navigate(['/profile']);
});
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