Subclassing is one of the mechanisms you use to customize behaviors while you're developing your iPad application. Subclassing involves two stages: (1) creating a new class, called a subclass, that inherits properties from another (super) class and then (2) adding properties as needed for your iPad application. In general, you’ll want to subclass

  • UIView, to create your (more complex) content views, which you may fill with controls, graphics, or the like.

  • UIViewController, to manage the content views and connect it to the model.

  • NSObject, to create Model views and delegates.