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
我会这样写:
ngOnInit() {
this.routed = this.router.events.map( event => event instanceof NavigationStart )
.subscribe(() => {
} );
}
ngOnDestroy() {
this.routed.unsubscribe();
}
其他回答
只需在AppRoutingModule上进行更改
@NgModule({
imports: [RouterModule.forRoot(routes, { scrollPositionRestoration: 'enabled' })],
exports: [RouterModule]
})
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)
});
}
}
RxJS 6
router.events.pipe(filter(event => event instanceof NavigationStart))
感谢Peilonrayz(见下面的评论)
new router >= RC.3
import { Router, NavigationStart, NavigationEnd, NavigationError, NavigationCancel, RoutesRecognized } from '@angular/router';
constructor(router:Router) {
router.events.forEach((event) => {
if(event instanceof NavigationStart) {
}
// NavigationEnd
// NavigationCancel
// NavigationError
// RoutesRecognized
});
}
你也可以通过给定的事件进行过滤:
import 'rxjs/add/operator/filter';
constructor(router:Router) {
router.events
.filter(event => event instanceof NavigationStart)
.subscribe((event:NavigationStart) => {
// You only receive NavigationStart events
});
}
使用成对操作符来获取先前和当前事件也是一个不错的想法。https://github.com/angular/angular/issues/11268#issuecomment-244601977
进口的rxjs /添加/运营商/成对的; import {Router} from '@angular/ Router '; 导出类AppComponent { 构造函数(私有路由器:router) { This.router.events.pairwise ().subscribe((event) => { console.log(事件); }); }; }
可以使用以下方法检测路由变化:
import {Router, ActivatedRoute} from '@angular/ Router '; 构造函数(私有路由:ActivatedRoute) {} This.router.events.subscribe ((event) => { 如果(事件){ / /做某事 } });