Angular2观察路线变化

Question

@RouteConfig([
    {path: '/about', name: 'About', component: About, useAsDefault: true},
    {path: '/test', name: 'Test', component: Test}
])

export class MyApp {
    router: Router;
    location: Location;
    isCollapsed: boolean = true;

    // ON ROUTE CHANGE {
        this.isCollapsed = true;
    // }

    constructor(router: Router, location: Location) {
        this.router = router;
        this.location = location;
    }
}

我需要在每次路线更改时更改变量值,如何在Angular 2.x中观察此事件？

Answer 1

在Angular 的最终版本中(例如Angular 2/4),您可以这样做

this.router.events.subscribe((event) => {
    if(event.url) {
        console.log(event.url);
    }
});

每次路线改变时,eventsObservable都会有信息.点击此处查看文档.

Answer 2

如果你正在使用

"@angular/router": "3.0.0-alpha.7", 
"@angular/router-deprecated": "2.0.0-rc.2",

然后

this.router.events.subscribe((event) => {
      console.log('route changed');
});

Answer 3

这是我在我的应用程序中使用的内容.您可以订阅Route实例以跟踪更改.

class MyClass {
  constructor(private router: Router) {
    router.subscribe((val) => /*detect changes*/)
  }
}