问为什么在canActivate()之前调用ngOnInit()？

EN

  // app.component.ts
  public ngOnInit(): void {
    // grab the action stream
    this.actions$.pipe(
      // Only pay attention to completed router 
      ofType(ROUTER_NAVIGATED),
      // Now I can guarantee that my resolve has completed, as the router has finsihed
      // Switch 
      switchMap(() => {
        // Now switch to get the stuff I was waiting for 
        return this.someService.getStuff();
      })
    // Need to subscribe to actions as we are in the component, not in an effect
    // I suppose we should unsubscribe, but the app component will never destroy as far as I am aware so will always be listening
    ).subscribe();