Angular 角度路由-区分新页面请求和来自不同模块的导航

在我的Angular应用程序中，我有一个仪表板组件，它将显示在加载的第一页上。当应用程序被加载时，我想向用户展示一些让他开始的提示。当他从另一个组件导航到仪表板时，我不想显示这些提示

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如何区分新页面请求和从不同页面导航到仪表板的用户？

我们通过在代码中放置解析器来实现这一点。它将在路由到达页面之前解析或执行。此时，您可以检查用户是直接访问还是来自其他页面。根据这一点，您可以显示内容

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

  constructor(private router: Router) { }

  public resolve(route: ActivatedRouteSnapshot,
                 state: RouterStateSnapshot): Observable<any> | TitleResolverData {

    // this will give you weather you are coming from start or from another page
    if (!this.router.routeReuseStrategy.shouldAttach(route)) {
      return Observable.of(something);
    // you have data
    } else {
      return {
        title: 'Dashboard - ' + route.params.xxxx
      }
    };
  }

}

这些是可用的方法

*/
export declare abstract class RouteReuseStrategy {
    /** Determines if this route (and its subtree) should be detached to be reused later */
    abstract shouldDetach(route: ActivatedRouteSnapshot): boolean;
    /** Stores the detached route */
    abstract store(route: ActivatedRouteSnapshot, handle: DetachedRouteHandle | null): void;
    /** Determines if this route (and its subtree) should be reattached */
    abstract shouldAttach(route: ActivatedRouteSnapshot): boolean;
    /** Retrieves the previously stored route */
    abstract retrieve(route: ActivatedRouteSnapshot): DetachedRouteHandle | null;
    /** Determines if a route should be reused */
    abstract shouldReuseRoute(future: ActivatedRouteSnapshot, curr: ActivatedRouteSnapshot): boolean;
}

*/
export declare abstract class RouteReuseStrategy {
    /** Determines if this route (and its subtree) should be detached to be reused later */
    abstract shouldDetach(route: ActivatedRouteSnapshot): boolean;
    /** Stores the detached route */
    abstract store(route: ActivatedRouteSnapshot, handle: DetachedRouteHandle | null): void;
    /** Determines if this route (and its subtree) should be reattached */
    abstract shouldAttach(route: ActivatedRouteSnapshot): boolean;
    /** Retrieves the previously stored route */
    abstract retrieve(route: ActivatedRouteSnapshot): DetachedRouteHandle | null;
    /** Determines if a route should be reused */
    abstract shouldReuseRoute(future: ActivatedRouteSnapshot, curr: ActivatedRouteSnapshot): boolean;
}