2016-07-24 60 views
1

我正在努力解决如何触发父组件模板中的本地引用,即#rightNav从子组件模板单击事件(click)="rightNav.open()"使用Material 2 sidenav。我想我需要使用@ViewChild注释,但不知道如何。如何从Angular 2中的子组件事件触发父组件中的本地引用?

子组件模板(应用条件列表):

<div *ngFor="let condition of conditions" [class.selected]="condition === selectedCondition" 
      (click)="rightNav.open()"></div> 

父组件模板(条件部分):

import { Component} from '@angular/core'; 
import { ConditionsListComponent } from './listComponent/conditions-list.component'; 


@Component({ 
    moduleId: module.id, 
    selector: 'app-conditions', 
    template: ` 
      <md-sidenav #rightNav align="end" mode="side"> 
      "Condition details will open here on click event" 
      </md-sidenav> 
      <app-conditions-list></app-conditions-list>`, 
    styleUrls: ['./conditions.component.css'], 
    directives: [ 
     ConditionsListComponent, 
    ] 
}) 

export class ConditionsComponent { 
    title = "Conditions Manager" 
} 

子组件嵌套在父组件模板。 谢谢!

+0

对我来说,目前尚不清楚''和''是相关的。 “父母成分”是什么意思? –

+0

谢谢@GünterZöchbauer。我清理了代码以删除不相关的代码。父组件是#rightNav引用所在的位置。 – odenman250

+0

请添加更多代码。对我来说,它仍然完全不清楚你试图完成什么。 –

回答

1

你可以从它的输出添加到子组件和监听事件

export class ConditionsListComponent { 
    @Output() navOpen:EventEmitter = new EventEmitter(); 
} 

您可以使用模板变量来引用兄弟相似的元素:

<div #rightNav align="end" mode="side" (close)="close($event)"</div> 
<app-conditions-list (navOpen)="rightNav.open()"></app-conditions-list>`, 

和事件的事件像

<div *ngFor="let condition of conditions" [class.selected]="condition === selectedCondition" 
     (click)="navOpen.next(null)"></div> 
1

您需要将您的活动从您的孩子上升到您的父母:

The child : 

export class ConditionsListComponent { 
    @Output('myEvent') myEvent = new EventEmitter(); 

    private bubbleUp($event:Event){ 

    myEvent.emit($event) 
    } 
} 

它的观点:

<div *ngFor="let condition of conditions" [class.selected]="condition === selectedCondition" 
     (click)="bubbleUp($event)"></div> 

和家长:

 import { Component} from '@angular/core'; 

@Component({ 
moduleId: module.id, 
selector: 'app-conditions', 
template: ` 
     <div #rightNav align="end" mode="side" (close)="close($event)"</div> 
     <app-conditions-list (myEvent)='gotTheEvent($event)' ></app-conditions-list>`, 
styleUrls: ['./conditions.component.css'], 
providers: [], 
directives: [ 
    ConditionsListComponent, 
] 
}) 

export class ConditionsComponent { 
    title = "Conditions Manager"; 

    gotTheEvent($event){ 

    console.log('I got this event from my child',$event); 

    //you can do whatever you want : 

    rightNav.open() 
    } 
} 
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