Cocoa Design Patterns (Developer's Library)

This book explains the object-oriented design patterns found in Apple's Cocoa frameworks. Design patterns aren't unique to Cocoa; they're recognized in most reusable software libraries and available in any software development environment. Design patterns simply identify recurring software problems and best practices for solving them. The primary goal of this book is to supply insight into the design and rationale of Cocoa, but with that insight, you'll be able to effectively re-use the tried and true patterns in your own software - even if you aren't using Cocoa.