Angular刷新当前页面的实现方法

时间:2020-05-16 staven 人气:9

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?page=23中的id或page属性更改
always ：始终触发

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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