在TypeScript中是否可以将一个按钮分配给“按住点击”事件?
例如:
<button ion-button icon-only color="royal" (click)="addNote()" (holdclick)="removeNote()">
在TypeScript中是否可以将一个按钮分配给“按住点击”事件?
例如:
<button ion-button icon-only color="royal" (click)="addNote()" (holdclick)="removeNote()">
press
事件(更多信息请参阅手势文档):import { Component } from '@angular/core';
@Component({
templateUrl: 'template.html'
})
export class BasicPage {
public press: number = 0;
constructor() {}
pressEvent(e) {
this.press++
}
}
并且在视图中:
<ion-card (press)="pressEvent($event)">
<ion-item>
Pressed: {{press}} times
</ion-item>
</ion-card>
import {Directive, ElementRef, Input, OnInit, OnDestroy} from '@angular/core';
import {Gesture} from 'ionic-angular';
@Directive({
selector: '[longPress]'
})
export class PressDirective implements OnInit, OnDestroy {
el: HTMLElement;
pressGesture: Gesture;
constructor(el: ElementRef) {
this.el = el.nativeElement;
}
ngOnInit() {
this.pressGesture = new Gesture(this.el, {
recognizers: [
[Hammer.Press, {time: 6000}] // Should be pressed for 6 seconds
]
});
this.pressGesture.listen();
this.pressGesture.on('press', e => {
// Here you could also emit a value and subscribe to it
// in the component that hosts the element with the directive
console.log('pressed!!');
});
}
ngOnDestroy() {
this.pressGesture.destroy();
}
}
然后在你的html元素中使用它:
<button longPress>...<button>