In just 24 sessions of one hour or less, you can master the Objective-C language, and start using it to write powerful native applications for both Macs and iOS devices! Using this book’s straightforward, step-by-step approach, you’ll get comfortable with Objective-C’s unique capabilities… make the most of its powerful implementation of objects and messaging…work effectively with design patterns, collections, blocks, threading, and a whole lot more. Every lesson builds on what you’ve already learned, giving you a rock-solid foundation for real-world success! Step-by-Step Instructions carefully walk you through the most common Objective-C development tasks. Quizzes and Exercises at the end of each chapter help you test your knowledge.