I am trying to programmatically change the user interface of a UIViewController from another NSObject class. The problem is that I am unsure of how to access the UIViewController's view from the NSObject class. So for example, in my NSObject class, I say something like:

 self.view = [[UIView alloc] initWithFrame:CGRectMake(0, 0, 320, 480)];

self.view.backgroundColor = [UIColor yellowColor];

but I keep getting errors saying "Request for member "view" in something not a strut or union." Is there something I need to allow my NSObject class to see my UIViewController? Thanks!