問(wèn)道Angular——Angular刷新當(dāng)前頁(yè)面

RyanHoo 發(fā)布于2019-08-26 13:24 / 3363人閱讀

摘要：默認(rèn)情況下，路由器將會(huì)忽略這次導(dǎo)航。但這樣會(huì)阻止類(lèi)似于刷新按鈕的特性。使用該選項(xiàng)可以配置導(dǎo)航到當(dāng)前時(shí)的行為。使用配置實(shí)際上不會(huì)重新加載路由，只是重新出發(fā)掛載在路由器上的事件。配置有三個(gè)值僅在路由參數(shù)更改時(shí)觸發(fā)。

onSameUrlNavigation

??從angular5.1起提供onSameUrlNavigation來(lái)支持路由重新加載。、

??有兩個(gè)值"reload"和"ignore"。默認(rèn)為"ignore"

??定義當(dāng)路由器收到一個(gè)導(dǎo)航到當(dāng)前 URL 的請(qǐng)求時(shí)應(yīng)該怎么做。默認(rèn)情況下，路由器將會(huì)忽略這次導(dǎo)航。但這樣會(huì)阻止類(lèi)似于 "刷新" 按鈕的特性。使用該選項(xiàng)可以配置導(dǎo)航到當(dāng)前 URL 時(shí)的行為。

使用 配置onSameUrlNavigation

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

??reload實(shí)際上不會(huì)重新加載路由，只是重新出發(fā)掛載在路由器上的事件。

配置runGuardsAndResolvers

??runGuardsAndResolvers有三個(gè)值：

paramsChange: 僅在路由參數(shù)更改時(shí)觸發(fā)。如/reports/:id 中id更改

paramsOrQueryParamsChange: 當(dāng)路由參數(shù)更改或參訓(xùn)參數(shù)更改時(shí)觸發(fā)。如/reports/:id/list?page=23中的id或page屬性更改

always?：始終觸發(fā)

const routes: Routes = [
  {
    path: "",
    children: [
      { path: "report-list", component: ReportListComponent },
      { path: "detail/:id", component: ReportDetailComponent, runGuardsAndResolvers: "always" },
      { path: "", redirectTo: "report-list", pathMatch: "full" }
    ]
  }
];

組件監(jiān)聽(tīng)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;
  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 {
    // 銷(xiāo)毀navigationSubscription，避免內(nèi)存泄漏
    if (this.navigationSubscription) {
      this.navigationSubscription.unsubscribe();
    }
  }

  initLoad(e) {
    window.scrollTo(0, 0);
    console.log(e);
  }
}

???問(wèn)道Angular系列???