iOS Components and Frameworks: Understanding the Advanced Features of the iOS SDK (2014)
Chapter 2. Core Location, MapKit, and Geofencing
Chapter 5. Getting Started with Address Book
Chapter 6. Working with Music Libraries
Chapter 7. Working with and Parsing JSON
Chapter 8. Getting Started with iCloud
Chapter 10. Bluetooth Networking with Game Kit
Chapter 13. Getting Up and Running with Core Data
Chapter 15. Integrating Twitter and Facebook Using Social Framework
Chapter 16. Working with Background Tasks
Chapter 17. Grand Central Dispatch for Performance
Chapter 18. Using Keychain to Secure Data
Chapter 19. Working with Images and Filters
Chapter 21. Introduction to TextKit
Chapter 22. Gesture Recognizers
Chapter 23. Accessing Photo Libraries
Chapter 24. Passbook and PassKit
Chapter 25. Debugging and Instruments