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Angular刷新当前页面的实现方法

onSameUrlNavigation

从angular5.1起提供onSameUrlNavigation来支持路由重新加载。

有两个值'reload'和'ignore'。默认为'ignore'

定义当路由器收到一个导航到当前 URL 的请求时应该怎么做。 默认情况下,路由器将会忽略这次导航。但这样会阻止类似于 "刷新" 按钮的特性。 使用该选项可以配置导航到当前 URL 时的行为。

使用

配置onSameUrlNavigation

@NgModule({
 imports: [RouterModule.forRoot(
  routes,
  { onSameUrlNavigation: 'reload' }
 )],
 exports: [RouterModule]
})

reload实际上不会重新加载路由,只是重新出发挂载在路由器上的事件。

配置runGuardsAndResolvers

runGuardsAndResolvers有三个值:

  • paramsChange: 仅在路由参数更改时触发。如/reports/:id 中id更改
  • paramsOrQueryParamsChange: 当路由参数更改或参训参数更改时触发。如/reports/:id/list"htmlcode">
    const routes: Routes = [
     {
      path: '',
      children: [
       { path: 'report-list', component: ReportListComponent },
       { path: 'detail/:id', component: ReportDetailComponent, runGuardsAndResolvers: 'always' },
       { path: '', redirectTo: 'report-list', pathMatch: 'full' }
      ]
     }
    ];
    

    组件监听router.events

    import {Component, OnDestroy, OnInit} from '@angular/core';
    import {Observable} from 'rxjs';
    import {Report} from '@models/report';
    import {ReportService} from '@services/report.service';
    import {ActivatedRoute, NavigationEnd, Router} from '@angular/router';
    
    @Component({
     selector: 'app-report-detail',
     templateUrl: './report-detail.component.html',
     styleUrls: ['./report-detail.component.scss']
    })
    export class ReportDetailComponent implements OnInit, OnDestroy {
     report$: Observable<Report>;
     navigationSubscription;
    
     constructor(
      private reportService: ReportService,
      private router: Router,
      private route: ActivatedRoute
     ) {
      this.navigationSubscription = this.router.events.subscribe((event: any) => {
       if (event instanceof NavigationEnd) {
        this.initLoad(event);
       }
      });
     }
    
     ngOnInit() {
      const id = +this.route.snapshot.paramMap.get('id');
      this.report$ = this.reportService.getReport(id);
     }
    
     ngOnDestroy(): void {
      // 销毁navigationSubscription,避免内存泄漏
      if (this.navigationSubscription) {
       this.navigationSubscription.unsubscribe();
      }
     }
    
     initLoad(e) {
      window.scrollTo(0, 0);
      console.log(e);
     }
    }
    
    

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