angularjs – 如何在整个应用程序中以角度2保存来自多个服务的数据？

@Injectable()
export class GlobalUserActions {
  // Subject would be better but I don't kNow TS/RxJS well enough
  // EventEmitter should only be used for @Output()
  saveAll:EventEmitter = new EventEmitter(); 

  doSaveAll() {
    saveAll.emit(null); // or any information that might be useful to components
  }
}

@Component({
  SELEctor: 'any-com',...
}) 
export class AnyComponent {
  constructor(
      private globalUserActions: GlobalUserActions,private persistenceservice: PersistenceservicE) {
    this.globalUserActions.saveAll.subscribe(savE);
  }

  save(value) {
    this.persistenceservice.save(...);
  }
}

bootstrap(AppComponent,[ ...,LocalStorageservice,// use a generic `Persistenceservice` but provide a concrete
    // `LocalStorageservice`
    provide(Persistenceservice,{useExisTing: LocalStorageservicE})
]);