我正在将我的应用程序从angularjs移动到angular2。我使用的是Angular Loading Bar
使用角度拦截器的自动装载杆。有用 自动,所以简单地将它作为依赖包括它,它会 自动显示$ http请求的进度。
我正在尝试在angular2中找到类似的插件。我遇到了一些像ng2-slim-loading-bar
这样的人,但在这里我必须手动管理进度。对于每个http请求,我必须手动启动进度条,然后完成它。
那么,是否有任何可用的插件可以完成Angular Loading Bar
在angularjs中的作用。或者我如何修改任何现有的插件,使其表现得像这样。
答案 0 :(得分:12)
您可以使用ngx-progressbar。在HTTP请求运行时,它可以automatically显示进度条。
您所要做的就是:
1-导入并提供NgProgressCustomBrowserXhr
import { NgProgressCustomBrowserXhr } from 'ngx-progressbar';
@NgModule({
providers: [
// ...
{ provide: BrowserXhr, useClass: NgProgressCustomBrowserXhr } ,
],
imports: [
// ...
NgProgressModule
]
})
2-在模板中使用如下所示。
<ng-progress></ng-progress>
您的HTTP将自动开始并完成进度 要求。无需使用NgProgressService来调用start()/ done() 手动
答案 1 :(得分:1)
以下是我在项目中所做的工作(Red Hat Automated Migration Toolkit):
LoadingIndicatorService
抓住。LoadingIndicatorService
SlimLoaderBarService
,complete()
。如果您对每个导航步骤有多个请求,这看起来很自然,并提供了良好的用户体验。
如果您通常只有1个请求,那么您可能想要调整基于CSS的动画(使其更长)或者使用start()
afterall。
以下是一些关键代码部分:
@Injectable()
export class LoadingIndicatorService {
constructor(
private _slimBarService: SlimLoadingBarService,
private _eventBusService: EventBusService,
) {
// Register the LoadingSomething event listeners.
this._eventBusService.onEvent
.filter(event => event.isTypeOf(LoadingSomethingStartedEvent))
.subscribe((event: LoadingSomethingStartedEvent) => this.loadingStarted() )
this._eventBusService.onEvent
.filter(event => event.isTypeOf(LoadingSomethingFinishedEvent))
.subscribe((event: LoadingSomethingFinishedEvent) => this.loadingFinished() )
}
public getSlimService(){
return this._slimBarService;
}
private counter: number = 0;
private max: number = void 0;
private reset() {
this.counter = 0;
this.max = void 0;
}
public loadingStarted(){
this.counter++;
this.max = this.counter;
this.updateProgress();
}
public loadingFinished(){
this.counter--;
this.updateProgress();
}
private updateProgress() {
if (this.counter == 0) {
this._slimBarService.height = "2px";
this._slimBarService.visible = true;
this._slimBarService.progress = 95;
this.max = void 0;
Observable.timer(700).subscribe(() => {
this._slimBarService.complete();
});
}
else {
// max - counter = finished.
// If the things to load are added after something loaded, the progress would go back.
// But let's rely on that loading will start fast at the beginning.
// Start at 20, jump to 90.
let percent = 20 + 70 * (1 - (this.max - this.counter) / this.max);
this._slimBarService.height = "3px";
this._slimBarService.color = "#39a5dc";
this._slimBarService.visible = true;
this._slimBarService.progress = percent;
}
}
}
let responseObservable2 = responseObservable.do(
() => console.log("Request SUCCEEDED"),
() => console.log("Request FAILED"),
() => {
console.log("Request FINISHED");
if (this._eventBus) {
console.log("Request FINISHED, firing");
this._eventBus.fireEvent(new LoadingSomethingFinishedEvent(responseObservable))
}
}
);
HTTP服务包装器:
@Injectable()
export class WindupHttpService extends Http {
private configureRequest(method: RequestMethod, f: Function, url: string | Request, options: RequestOptionsArgs = {}, body?: any): Observable<Response> {
let responseObservable: Observable<Response> = ...
...
console.log("Load STARTED");
if (this._eventBus)
console.log("Load STARTED, firing");
this._eventBus.fireEvent(new LoadingSomethingStartedEvent(responseObservable));
return responseObservable2;
}
有关完整代码,请搜索github.com以获取项目Windup。