[英]Iterate through multiple @ViewChild instances of the same component angular2
I have an Ionic 2 application with a ParentComponent calling ChildComponent @ViewChild method to fire up multiple ChildComponents. 我有一个Ionic 2应用程序,其中ParentComponent调用ChildComponent @ViewChild方法来启动多个ChildComponents。 One of the ChildComponents get's instantiated twice in the view with different parameters like so:
其中一个ChildComponents在视图中使用不同的参数实例化两次,如下所示:
<ChildComponent [startFrom]="0" [limitTo]="1"></ChildComponent>
<ChildComponent [startFrom]="1" [limitTo]="1"></ChildComponent>
After an offline/online device state change, I call ChildComponent's method to update a list of items it returns. 在离线/在线设备状态更改后,我调用ChildComponent的方法来更新它返回的项目列表。
@ViewChild(ChildComponent) childComponent: ChildComponent;
ngOnInit(): void {
this.networkService.connectSubscription(() => {
this.childComponent.getItems();
});
}
The issue here is this.childComponent
only get's hold of the first ChildComponent instance of the two. 这里的问题是
this.childComponent
只能抓住两者的第一个ChildComponent实例。
Is there a way to iterate through multiple instances of the same @ViewChild component so I could do something like this.childComponent1.getItems()
and this.childComponent2.getItems()
? 有没有办法迭代同一个@ViewChild组件的多个实例,所以我可以做类似
this.childComponent1.getItems()
和this.childComponent2.getItems()
事情?
Thanks for your help. 谢谢你的帮助。
@ViewChildren(ChildComponent) childComponents: QueryList<ChildComponent>;
ngAfterViewInit(): void {
this.networkService.connectSubscription(() => {
this.childComponents.toArray();
});
}
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