Question

当我导航到相同的组件（带有nativescript angular）时，我可以拦截params更改但是当我点击Android Back按钮时，它不会返回到上一页。

constructor(private pageRoute: PageRoute) {
    super();
    this.pageRoute.activatedRoute
        .switchMap(activatedRoute => activatedRoute.params)
        .forEach((params) => { 
            this._groupId = params['id'];
            this.load(); // this method reload the list in the page.
        });
}

我使用不同的网址“home”导航到同一页面“group /：id” - ＆gt; “group / 1” - ＆gt; “group / 2” - ＆gt; “组/ 3”。如果我单击“group / 3”中的Android Back Button，我将返回“home”。

我可以在应用程序历史记录中添加“新页面”吗？

由于

Answer 1

您要做的是使用CustomRouteReuseStrategy

import { Injectable } from '@angular/core';
import { ActivatedRouteSnapshot } from '@angular/router';
import { NSLocationStrategy } from 'nativescript-angular/router/ns-location-strategy';
import { NSRouteReuseStrategy } from 'nativescript-angular/router/ns-route-reuse-strategy';

@Injectable()
export class CustomRouteReuseStrategy extends NSRouteReuseStrategy {

     constructor(location: NSLocationStrategy) {
         super(location);
     }

     shouldReuseRoute(future: ActivatedRouteSnapshot, curr: ActivatedRouteSnapshot): boolean {
         return false;
     }
}

，然后在您的AppModule中将其作为提供程序

import { NgModule, NgModuleFactoryLoader, NO_ERRORS_SCHEMA } from "@angular/core";
import { RouteReuseStrategy } from "@angular/router";
import { NativeScriptModule } from "nativescript-angular/nativescript.module";

import { AppRoutingModule } from "./app-routing.module";
import { CustomRouteReuseStrategy } from "./custom-router-strategy";
import { AppComponent } from "./app.component";

@NgModule({
    bootstrap: [
        AppComponent
    ],
    imports: [
        NativeScriptModule,
        AppRoutingModule
    ],
    declarations: [
        AppComponent
    ],
    providers: [
        {
            provide: RouteReuseStrategy,
            useClass: CustomRouteReuseStrategy
        }
    ],
    schemas: [
        NO_ERRORS_SCHEMA
    ]
})
export class AppModule { }

这是play.nativescript.org中的一个例子

https://play.nativescript.org/?template=play-ng&id=AspHuI

（我没有做这个，我只是在传递我学到的信息。）

此外，如果您只希望某些页面重用路由策略，则需要进行其他代码更改

 shouldReuseRoute(future: ActivatedRouteSnapshot, current: ActivatedRouteSnapshot): boolean {
// first use the global Reuse Strategy evaluation function,
// which will return true, when we are navigating from the same component to itself
let shouldReuse = super.shouldReuseRoute(future, current);

// then check if the noReuse flag is set to true
if (shouldReuse && current.data.noReuse) {
  // if true, then don't reuse this component
  shouldReuse = false;
}

然后可以将noReuse用作路由参数，以便除了默认的“ shouldReuse”之外还要进行其他检查

希望这会有所帮助！

导航到同一页面时，我遇到“历史回复”的问题

1 个答案: