我们已在路由文件 app-routing.module.ts 中配置preloadingStrategy: PreloadAllModules
,以便在首页加载时加载所有模块。因为它有点滞后,我们希望在加载最后一个模块之前显示加载动画。这可能吗?
应用-routing.component.ts :
@NgModule({
imports: [RouterModule.forRoot(routes, { preloadingStrategy: PreloadAllModules })],
exports: [RouterModule]
})
我们已经实现了用于重新路由的gif动画。
app.component.ts :
router.events.subscribe((routerEvent: Event) => {
this.checkRouterEvent(routerEvent);
});
....
checkRouterEvent(routerEvent: Event): void {
if (routerEvent instanceof NavigationStart) {
this.loading = true;
}
// this.loading is just a boolean to show <div> with animation inside or not.
if (routerEvent instanceof NavigationCancel ||
routerEvent instanceof NavigationEnd ||
routerEvent instanceof NavigationError) {
this.loading = false;
}
}
答案 0 :(得分:0)
我自己想出了办法。我不知道这是不是正确的方式,但它对我有用。我只是检查RouteConfigLoadStart
和RouteConfigLoadEnd
事件。
private numberOfLoadingModules: number = 0;
private numberOfLoadedModules: number = 0;
checkRouterEvent(routerEvent: Event): void {
// Used for site init. For each module which will be loaded this event is fired
if (routerEvent instanceof RouteConfigLoadStart) {
this.loading = true;
this.numberOfLoadingModules += 1;
}
// Used for site init. For each module which has been loaded this event is fired
if (routerEvent instanceof RouteConfigLoadEnd) {
this.numberOfLoadedModules += 1;
}
// Check if all modules are completly loaded. Needed because of lagging if preloadStrategy is used (in app-routing).
if (this.numberOfLoadedModules == this.numberOfLoadingModules) {
this.loading = false;
}
if (routerEvent instanceof NavigationStart) {
this.loading = true;
}
if (routerEvent instanceof NavigationCancel ||
routerEvent instanceof NavigationEnd ||
routerEvent instanceof NavigationError) {
this.loading = false;
}
}