angular – 如何取消订阅/停止Observable?
发布时间:2020-12-17 06:51:54 所属栏目:安全 来源:网络整理
导读:我使用以下代码作为计时器: export class TimerService { private ticks: number = 0; private seconds: number = 0; private timer; constructor(seconds: number) { this.seconds = seconds; this.timer = Observable.timer(2000,1000); this.timer.subsc
我使用以下代码作为计时器:
export class TimerService { private ticks: number = 0; private seconds: number = 0; private timer; constructor(seconds: number) { this.seconds = seconds; this.timer = Observable.timer(2000,1000); this.timer.subscribe(t => { this.ticks = t; this.disactivate(); }); } private disactivate() { if (this.ticks === this.seconds) { this.timer.dispose(); } } } 当我尝试停止计时器时: this.timer.dispose(); // this.timer.unsubscribe(); 它对我不起作用 解决方法
subscribe方法返回一个Subscription对象,稍后您可以使用该对象来停止侦听您订阅的observable所包含的流.
import { ISubscription } from 'rxjs/Subscription': import { TimerObservable } from 'rxjs/observable/TimerObservable'; export class TimerService { private ticks = 0; private timer$: TimerObservable; private $timer : ISubscription; constructor(private seconds = 0) { this.timer$= TimerObservable.create(2000,1000);//or you can use the constructor method this.$timer = this.timer.subscribe(t => { this.ticks = t; this.disactivate(); }); } private disactivate() { if (this.ticks >= this.seconds) { this.$timer.unsubscribe(); } } } 重要的是要注意在rxjs(版本5及更高版本)中存在取消订阅,在此之前,在rx(版本低于5,不同的包)中,该方法称为dispose (编辑:李大同) 【声明】本站内容均来自网络,其相关言论仅代表作者个人观点,不代表本站立场。若无意侵犯到您的权利,请及时与联系站长删除相关内容! |