如何显示装载机3秒并隐藏在角度2中 [英] How to show a loader for 3 sec and hide in angular 2
本文介绍了如何显示装载机3秒并隐藏在角度2中的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
我希望装载机显示5秒钟,并在我单击按钮时隐藏, 到目前为止,我尝试过
I want a loader show for 5 sec and hide when i click on a button, so far i tried
<div *ngIf='showloader' class="form-group loaderformgroup maindivdisplaynone" id="waitresponce" >
<div class="waitresponce">
<img src="assets/img/loader.gif" img-from="assets" alt="loader" class="waitresponceloader"/>
</div>
</div>
resetform() {
this.student = {};
Observable.timer(500).subscribe(() => {
$('#tablebody').addClass('fadding');
this.showloader = true;
Observable.timer(500).subscribe(() =>
$('#tablebody').removeClass('fadding');
this.showloader = false
);
});
}
我的ts,
setInterval(() => {
this.showloader = true;
}, 2000);
但是它显示的是2000年以后的装载机.有人可以帮忙.谢谢.
But it is showing loader after 2000.Can someone please help.Thanks.
推荐答案
不建议在Angular 2中使用setTimeout
.您可以为其使用Observable
和timer
:
Using setTimeout
is not advisable with angular 2. you can use Observable
and timer
for it :
import { Component, OnInit, OnDestroy } from '@angular/core';
import { Subscription } from 'rxjs/Subscription';
import { Observable } from 'rxjs/Observable';
import 'rxjs/add/observable/timer';
@Component({
selector : 'my-component'
})
export class MyComponent implements OnInit, OnDestroy {
public showloader: boolean = false;
private subscription: Subscription;
private timer: Observable<any>;
public ngOnInit() {
// call this setTimer method when you want to set timer
this.setTimer();
}
public ngOnDestroy() {
if ( this.subscription && this.subscription instanceof Subscription) {
this.subscription.unsubscribe();
}
}
public setTimer(){
// set showloader to true to show loading div on view
this.showloader = true;
this.timer = Observable.timer(5000); // 5000 millisecond means 5 seconds
this.subscription = this.timer.subscribe(() => {
// set showloader to false to hide loading div from view after 5 seconds
this.showloader = false;
});
}
}
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