我试图避免在ionic 4中双击或双击按钮,因为它仅在单击时才触发 Action 。如果我双击,我希望一个 Action 被触发一次而不是两次。我尝试了几个选项,例如“禁用”按钮,“设置超时”,但没有任何效果。在寻找更好的解决方案时,我发现许多论坛建议在Angular中使用debounceTime。
我遵循How to prevent double click in Angular?中建议的答案并尝试创建指令,但是单击“debounceClick”会给我以下错误。
ERROR Error: Uncaught (in promise): Error: Template parse errors:
Can't bind to 'debounceTime' since it isn't a known property of 'button'. ("
</ion-content>
<button appIonCLick (debounceClick)="log()" [ERROR ->][debounceTime]="700">Throttled Click</button>
以下是我创建的指令
import {
Directive, EventEmitter, HostListener, Input, OnDestroy, OnInit,
Output
} from '@angular/core';
import { Subject } from 'rxjs';
import { Subscription } from 'rxjs';
import { debounceTime } from 'rxjs/operators';
@Directive({
selector: '[appIonCLick]'
})
export class IonCLickDirective implements OnInit, OnDestroy {
@Input()
debounceTime = 500;
@Output()
debounceClick = new EventEmitter();
private clicks = new Subject();
private subscription: Subscription;
constructor() { }
ngOnInit() {
this.subscription = this.clicks.pipe(
debounceTime(this.debounceTime)
).subscribe(e => this.debounceClick.emit(e));
}
ngOnDestroy() {
this.subscription.unsubscribe();
}
@HostListener('click', ['$event'])
clickEvent(event) {
event.preventDefault();
event.stopPropagation();
this.clicks.next(event);
}
}
下面是HTML
<button appIonCLick (debounceClick)="log()" [debounceTime]="700">Debounce Click</button>
如果我做错了什么可以帮助我吗?我没有运气寻找 ionic 按钮单击的debounceTime。任何帮助表示赞赏!
最佳答案
您需要使用此模块的地方。
<button appIonCLick (debounceClick)="log()" debounceTime="700">Debounce Click</button>
试试这个[debounceTime]-> debounceTime