All too often, developers grind through building good apps on willpower and a vigorous focus on code development, leaving them unaware of and unable to benefit from the underlying structural and functional design patterns. 

Pro Objective-C ... Read moreDesign Patterns for iOS will teach you those design patterns that have always been present at some level in your code, but were never recognized, acknowledged, or fully utilized. Implementation of specific pattern approaches will prove their value to any developer working in the iOS application arena. You’ll learn to master classic patterns like singleton, abstract factory, chain of responsibility, and observer. You’ll also discover less well-known but useful patterns like memento, composite, command, and mediator.