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我有一些数据必须在页面加载之前加载，我正在使用路由解析器来实现这一点。下面是我的代码。

服务：

getUsernamesAndBUs(): Observable<any> {
    return Observable.forkJoin(
      this.http.get('http://localhost:8080/BMSS/getBusinessUnit'),
      this.http.get('http://localhost:8080/BMSS/getAllUser'),
      this.http.get('http://localhost:8080/BMSS/getCountry'),
      this.http.get('http://localhost:8080/BMSS/getCurrency')
    );
  }

解析器：

import { Injectable } from '@angular/core';
import { Resolve, ActivatedRouteSnapshot } from '@angular/router';
import { AgreementDetailsService } from './agreement-details.service';
import { Observable } from 'rxjs/Observable';

@Injectable()
export class UsernamesAndBusResolveService implements Resolve<any> {

  constructor(private agreementDetailsService: AgreementDetailsService) { }

  resolve(route: ActivatedRouteSnapshot): Observable<any> {
    return this.agreementDetailsService.getUsernamesAndBUs();
  }
}

路由模块：

{
    path: 'agreement',
    canActivate: [CanActivateAuthGuardService],
    children: [
      {
        path: 'create',
        component: AgreementComponent,
        resolve: { usernamesAndBUs: UsernamesAndBusResolveService }
      }
    ]
  }

在路由到的组件中：

this.businessUnits = this.route.snapshot.data['usernamesAndBUs'][0];
this.users = this.route.snapshot.data['usernamesAndBUs'][1];
this.countries = this.route.snapshot.data['usernamesAndBUs'][2];
this.currencies = this.route.snapshot.data['usernamesAndBUs'][3];

在拦截器中：

intercept(httpRequest: HttpRequest<any>, httpHandler: HttpHandler): Observable<HttpEvent<any>> {
    if (!this.typeAheads.includes(httpRequest.url.split('/').pop())) {
      this.bmssLoaderService.start();
    } else {
      this.bmssLoaderService.stop();
    }


    return httpHandler.handle(httpRequest).do((httpEvent: HttpEvent<any>) => {
      if (httpEvent instanceof HttpResponse) {
        this.bmssLoaderService.stop();
      }
    }, (error: any) => {
      this.bmssLoaderService.stop();
    });
  }

我使用了一个微调器（使用HttpInterceptor），它在调用后端服务时显示并在服务返回后消失。现在，即使在后端服务返回后，组件也需要很长时间才能加载，所以在微调器消失后，用户仍然在同一页面上一段时间（大约 10 秒），然后才路由到目标页面。

我不明白是什么导致了这种延迟，我哪里错了。请帮我解决一下这个。

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0 回答 0