free Objective-C textbooks

Objective-C is a dynamic, object-oriented programming language pivotal in developing apps for Apple's ecosystem. Renowned for its seamless integration with C and Cocoa frameworks, its unique messaging syntax sets it apart. Essential for creating iOS and macOS applications, Objective-C offers robust performance but presents a steep learning curve. Enthusiasts appreciate its flexibility and longevity, despite being overshadowed by Swift in new projects. With continued relevance in legacy systems, understanding Objective-C remains crucial for developers navigating the transition from old to new paradigms.