Angular:如何获取路由器插座的组件实例 [英] Angular: How to get component instance of router-outlet

问题描述

html:

<router-outlet></router-outlet>

组件:

@Component({
      selector: 'xx',
      templateUrl: './xx.html',
      styleUrls: ['./xx.css'],
      providers: [ RouterOutlet]
    })
    export class AppComponent {
    constructor(private routeroutlet: RouterOutlet){ }
    getref() {
     console.log(this.routeroutlet);
     console.log('refresh', this.routeroutlet.component);
    }
}

我收到此错误

core.es5.js:1224 ERROR Error: Outlet is not activated
    at RouterOutlet.get [as component] (router.es5.js:5449)
    at AppComponent.onRefreshscrum (app.component.ts:343)
    at Object.eval [as handleEvent] (AppComponent.ngfactory.js:111)
    at Object.handleEvent (core.es5.js:12251)
    at Object.handleEvent (core.es5.js:12975)
    at dispatchEvent (core.es5.js:8863)
    at eval (core.es5.js:11025)
    at SafeSubscriber.schedulerFn [as _next] (core.es5.js:3851)
    at SafeSubscriber.__tryOrUnsub (Subscriber.js:223)
    at SafeSubscriber.next (Subscriber.js:172)

控制台结果:(this.routeroutlet)

console result:(this.routeroutlet)

RouterOutlet {
parentContexts: ChildrenOutletContexts, 
location: null, 
resolver: CodegenComponentFactoryResolver, 
changeDetector: ViewRef_, 
activated: null, …}activateEvents: EventEmitter {_isScalar: false, observers: Array(0), 
closed: false, 
isStopped: false, 
hasError: false, 
…}
closed: false
hasError: false
isStopped: false
observers: []thrown
Error: null
__isAsync: false
_isScalar: false
__proto__: Subject
activated: null
activatedRoute: (...)activatedRouteData: (...)changeDetector: ViewRef_ {_view: {…}, _viewContainerRef: null, _appRef: null}
component: [Exception: Error: Outlet is not activated
    at RouterOutlet.get [as component] (webpack:///./~/@angular/router/@angular/router.es5.js?:5449:23)
    at RouterOutlet.remoteFunction (<anonymous>:2:26)]deactivateEvents: EventEmitter {_isScalar: false, observers: Array(0), 
closed: false, 
isStopped: false, 
hasError: false, …}
isActivated: (...)location: nulllocationFactoryResolver: (...)l
ocationInjector: (...)name: "primary"
parentContexts: ChildrenOutletContexts {contexts: Map(1)}resolver: CodegenComponentFactoryResolver {_parent: null, _ngModule: NgModuleRef_, _factories: Map(52)}_activatedRoute: null__proto__: ObjectactivateWith: ƒ (activatedRoute, resolver)activatedRoute: (...)activatedRouteData: (...)attach: ƒ (ref, activatedRoute)component: (...)deactivate: ƒ ()detach: ƒ ()isActivated: (...)locationFactoryResolver: (...)locationInjector: (...)ngOnDestroy: ƒ ()ngOnInit: ƒ ()arguments: (...)caller: (...)length: 0name: ""prototype: {constructor: ƒ}__proto__: ƒ ()[[FunctionLocation]]: router.es5.js:5400[[Scopes]]: Scopes[3]constructor: ƒ RouterOutlet(parentContexts, location, resolver, name, changeDetector)get activatedRoute: ƒ ()get activatedRouteData: ƒ ()get component: ƒ ()get isActivated: ƒ ()get locationFactoryResolver: ƒ ()get locationInjector: ƒ ()__proto__: Object

上面的控制台结果是用于控制台routeroutlet obj.

The above console result is for console the routeroutlet obj.

我想访问在路由器插座中呈现的组件的实例.我如何访问组件的实例?

I want to access the instance of the component which is rendered in router-outlet. how i access the instance of the component?

推荐答案

不要尝试使用 RouterOutlet 作为提供程序.而是将 (activate) 属性添加到您的路由器插座标签，如下所示:

Don't try to use RouterOutlet as a provider. Instead add the (activate) attribute to your router-outlet tag like this:

<router-outlet (activate)="onRouterOutletActivate($event)"></router-outlet>

然后在包含路由器出口元素(您的 AppComponent 类)的组件中，您应该实现 onRouterOutletActivate 方法:

And then in the component containing the router-outlet element (your AppComponent class) you should implement the onRouterOutletActivate method:

public onRouterOutletActivate(event : any) {
    console.log(event);
}

这将在事件参数中为您提供路由组件实例，在此示例中写入 Web 控制台.

which will give you the route component instance in the event parameter, in this example written to the web console.

这篇关于Angular:如何获取路由器插座的组件实例的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！