我正在寻找在我的AppComponent中检测路由变化。
然后,我将检查全局用户令牌,以查看用户是否已登录,以便在用户未登录时重定向该用户。
我正在寻找在我的AppComponent中检测路由变化。
然后,我将检查全局用户令牌,以查看用户是否已登录,以便在用户未登录时重定向该用户。
当前回答
为那些使用Angular9+的人更新了答案,通过使用@angular/ Router提供的路由器API并监听路由变化
import { Component } from '@angular/core';
import { Router,NavigationEnd } from '@angular/router';
@Component({
selector: 'my-app',
templateUrl: './app.component.html',
styleUrls: [ './app.component.css' ]
})
export class AppComponent {
name = 'Get Current Url Route Demo';
currentRoute: string;
routeSubscription: subscription;
constructor(private router: Router){
console.log(router.url);
this.routeSubscription = router.events.filter(event => event instanceof NavigationEnd)
.subscribe(event =>
{
this.currentRoute = event.url;
console.log(event);
});
}
}
其他回答
下面的方法可以帮你解决棘手的问题。
// in constructor of your app.ts with router and auth services injected
router.subscribe(path => {
if (!authService.isAuthorised(path)) //whatever your auth service needs
router.navigate(['/Login']);
});
不幸的是,这在路由过程中比我想要的晚些时候重定向。在重定向之前调用原始目标组件的onActivate()。
你可以在目标组件上使用@CanActivate装饰器,但这是a)不集中的,b)不能从注入的服务中受益。
如果有人能提出一种更好的方法,在路由提交之前对其进行集中授权,那就太好了。我相信一定有更好的办法。
这是我当前的代码(我如何改变它来监听路由变化?):
import {Component, View, bootstrap, bind, provide} from 'angular2/angular2';
import {ROUTER_BINDINGS, RouterOutlet, RouteConfig, RouterLink, ROUTER_PROVIDERS, APP_BASE_HREF} from 'angular2/router';
import {Location, LocationStrategy, HashLocationStrategy} from 'angular2/router';
import { Todo } from './components/todo/todo';
import { About } from './components/about/about';
@Component({
selector: 'app'
})
@View({
template: `
<div class="container">
<nav>
<ul>
<li><a [router-link]="['/Home']">Todo</a></li>
<li><a [router-link]="['/About']">About</a></li>
</ul>
</nav>
<router-outlet></router-outlet>
</div>
`,
directives: [RouterOutlet, RouterLink]
})
@RouteConfig([
{ path: '/', redirectTo: '/home' },
{ path: '/home', component: Todo, as: 'Home' },
{ path: '/about', component: About, as: 'About' }
])
class AppComponent {
constructor(location: Location){
location.go('/');
}
}
bootstrap(AppComponent, [ROUTER_PROVIDERS, provide(APP_BASE_HREF, {useValue: '/'})]);
以以下方式捕获路由更改事件…
import { Component, OnInit, Output, ViewChild } from "@angular/core";
import { Router, NavigationStart, NavigationEnd, Event as NavigationEvent } from '@angular/router';
@Component({
selector: "my-app",
templateUrl: "app/app.component.html",
styleUrls: ["app/app.component.css"]
})
export class AppComponent {
constructor(private cacheComponentObj: CacheComponent,
private router: Router) {
/* Route event types
NavigationEnd
NavigationCancel
NavigationError
RoutesRecognized
*/
router.events.forEach((event: NavigationEvent) => {
//Before Navigation
if (event instanceof NavigationStart) {
switch (event.url) {
case "/app/home":
{
//Do Work
break;
}
case "/app/About":
{
//Do Work
break;
}
}
}
//After Navigation
if (event instanceof NavigationEnd) {
switch (event.url) {
case "/app/home":
{
//Do Work
break;
}
case "/app/About":
{
//Do Work
break;
}
}
}
});
}
}
在Angular 2中,你可以订阅(Rx事件)一个Router实例。 你可以这样做
class MyClass {
constructor(private router: Router) {
router.subscribe((val) => /*whatever*/)
}
}
编辑(从rc.1开始)
class MyClass {
constructor(private router: Router) {
router.changes.subscribe((val) => /*whatever*/)
}
}
编辑2(从2.0.0开始)
请参见:路由器。活动文档
class MyClass {
constructor(private router: Router) {
router.events.subscribe((val) => {
// see also
console.log(val instanceof NavigationEnd)
});
}
}
在angular 6和RxJS6中:
import { filter, debounceTime } from 'rxjs/operators';
this.router.events.pipe(
filter((event) => event instanceof NavigationEnd),
debounceTime(40000)
).subscribe(
x => {
console.log('val',x);
this.router.navigate(['/']); /*Redirect to Home*/
}
)
这里的答案是正确的路由器弃用。对于最新版本的路由器:
this.router.changes.forEach(() => {
// Do whatever in here
});
or
this.router.changes.subscribe(() => {
// Do whatever in here
});
要了解两者之间的区别,请查看这个SO问题。
Edit
对于最新的您必须做:
this.router.events.subscribe(event: Event => {
// Handle route change
});