accessing view controller's view

Question

I am inside a class on a view-based app, one that was creating with one view controller.

WHen I am inside the view controller I can access its view using self.view, but how do I access the same view if I am inside a class?

[[UIApplication sharedApplication] delegate]... //??? what do I put here?

thanks

Answer 1

Assuming that the view controller is a member of your application delegate. you can access it like this: ("YourAppDelegate" should be replaced with the actual type name of your application delegate)

( ( YourAppDelegate *) [ [ UIApplication sharedApplication ] delegate ] ).viewController.view;

Answer 2

If you're trying to give a singleton a reference to your main viewController, a better solution might be to get your MyAppDelegate to set a viewController property on your singleton at launch:

- (void)applicationDidFinishLaunching:(UIApplication *)application
{
    [MySingletonClass sharedSingleton].viewController = self.viewController;
}

If you plan on re-using a Singleton like this in multiple projects, it often makes more sense to set these sort of properties from your AppDelegate.

Answer 3

A subview really shouldn't be manipulating a parent view, each class should manage it's own view.

Anyway, if your class is a subclass of UIView and is a subview of the viewController, you can get the viewController's view by accessing the superview property to get your parent view.