Mac and iPhone developers are often overwhelmed by the breadth and sophistication of the Cocoa frameworks. Although Cocoa is indeed huge, once you understand the object-oriented patterns it uses, you’ll find it remarkably elegant, consistent, and simple.
Cocoa Design Patterns begins with the mother of all patterns: the Model-View-Controller (MVC) pattern, which is central to all Mac and iPhone development. Encouraged, and in some cases enforced by Apple’s tools, it’s important to have a firm grasp of MVC right from the start.
The book’s midsection is a catalog of the essential design patterns you’ll encounter in Cocoa, including
Fundamental patterns, such as enumerators, accessors, and two-stage creation
Patterns that empower, such as singleton, delegates, and the responder chain
Patterns that hide complexity, including bundles, class clusters, proxies and forwarding, and controllers
