我的问题是我有两个组件(让它们称为 comp1 和 comp2 ),我必须在 comp1中调用函数show_it(list)
和 comp2 中的一些数据。因此,目前,如果我使用按钮轻松触发它,该按钮将在 comp2 中实现。但是我的目的是,我想通过单击带有(click)
事件的标签来触发 comp1 中的 comp2 功能。有人可以解决我的问题吗?
我如何在home.html中调用comp1和comp2:
<comp1 [list]="lists" (emitList)="onListUpdate($event)"></comp1>
<comp2 [list]="additionalInformationList"></comp2>
我的home.ts的onListUpdate功能:
onListUpdate(list: {item:string}[]){
this.additionalInformationList=list;
console.log(list);
}
我的comp1的.html:
div>
<ion-list>
<ion-item *ngFor="let list of list">
<ion-label (click)="updateList(list)">{{list.item.free_text}}</ion-label>
<ion-checkbox *ngIf="list.item.checkbox==true" disabled="false"></ion-checkbox>
</ion-item>
</ion-list>
我的comp1的.ts:
@Component({
selector: 'caiditems',
templateUrl: 'caiditems.html'
})
export class CaiditemsComponent {
transformedList=[];
@Input()
list = [];
@Output()
emitList = new EventEmitter<{item:string}[]>();
constructor() {
this.emitList.emit(this.list);
}
updateList(list) {
if(list.item.additional_information!=null){
this.transformedList=[
{item: {id: list.item.id, free_text: list.item.free_text, checkbox: list.item.checkbox, additional_information: list.item.additional_information}}]
console.log("not empty")
}
else{
this.transformedList=[{item: {id: list.item.id, free_text: list.item.free_text, checkbox: list.item.checkbox, additional_information: ""}}]
console.log("empty")
}
this.emitAdditionalinformations(this.transformedList);
console.log('additional information list updated')
}
emitAdditionalinformations(transformedList){
this.emitList.emit(this.transformedList);
console.log('list emited');
}
我的comp2的.html:
<div>
<button ion-button (click)="show_it(list)">show it to meeeeeee</button><br>
<ion-label>{{additionalinformation}}<br><br></ion-label>
</div>
我的comp2档案:
@Component({
selector: 'caidadditionalinformations',
templateUrl: 'caidadditionalinformations.html'
})
export class CaidadditionalinformationsComponent {
additionalinformation="hi";
@Input()
list = [];
constructor() {
}
show_it(list){
console.log(list);
if(list[0].item.additional_information!=""){
console.log(list[0].item.additional_information);
this.additionalinformation=list[0].item.additional_information;
}
else{
this.additionalinformation="no additional informations";
}
}
答案 0 :(得分:1)
从这段代码中摘录:
<comp1 [list]="lists" (emitList)="onListUpdate($event)"></comp1>
<comp2 [list]="additionalInformationList"></comp2>
我假设comp1
和comp2
都是HomePage
的子代。当您从comp1
单击标签时,onListUpdate($event)
的方法在HomePage
中执行,对吗?
您可以在comp2
中获得HomePage
组件的引用,然后使用该引用调用show_it()
方法。
会是这样的:
@Component(...)
export class HomePage {
// Get a reference of the component instance
@ViewChild(CaidadditionalinformationsComponent) comp2: CaidadditionalinformationsComponent;
onListUpdate(list: {item:string}[]){
this.additionalInformationList = list;
console.log(list);
// Use the reference to call the public method
this.comp2.show_it(list);
}
}
如果在您的应用程序上下文中这没有意义,请告诉我,也许创建一个stackblitz项目将有助于我们更好地了解您的特定情况。
还有一些在组件之间共享数据的方法: