在同级组件中捕获事件 [英] Catch event in sibling component
问题描述
我的应用看起来像这样:
My app looks like this :
<my-app>
<my-toolbar></my-toolbar>
<my-cube-container></my-cube-container >
</my-app>
我想从my-toolbar
交流到my-cube-container
.
我正在从工具栏发送事件:
I'd like to communicate from my-toolbar
to my-cube-container
.
I'm sending an event from the toolbar :
@Component({
selector: 'my-toolbar',
template: `...
<i class="fa fa-search-minus ic" (click)='onZoom(-1)' aria-hidden="true"></i>
`,
})
export class ToolbarComponent {
@Output() zoomEvent: EventEmitter<number> = new EventEmitter();
onZoom(value:number){
console.log('event sent');
this.zoomEvent.emit(value);
}
}
首先,我想在同级事件my-cube-container
中捕获事件(请参见上面的应用程序结构).但是我读到,发出事件和捕获事件的关系仅保留给父母子女沟通. **是这样吗? **
And first I wanted to catch the event in the sibling which is my-cube-container
(see app structure above). However I read that this relation of emitting event and catching those are solely reserved for parent children communication. ** Is that the case ? **
因此,我尝试改为与父级进行通信(并在将来创建另一个eventEmitter,以便可以在目标组件my-cube-container
中捕获该事件).但是,我仍然没有赶上这次活动.
So I tried to communicate with the parent instead then (and create another eventEmitter in the future so I can catch the event in my target component my-cube-container
). However I'm still not catching the event.
@Component({
selector: 'my-app',
template: `
<my-toolbar></my-toolbar>
<my-cube-container (zoomEvent)="onZoom($event)"></my-cube-container>
`
})
export class AppComponent {
onZoom(val){
console.log("event catched");
}
}
我做错了什么?我需要在ngModul中进行更改吗?
What I am doing wrong ? Do I need to change something in ngModul ?
推荐答案
您可以使用模板变量从模板中引用同级兄弟
You can use template variables to reference siblings from within the template
<my-toolbar (zoomEvent)="container.onZoom($event)"></my-toolbar>
<my-cube-container #container></my-cube-container >
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