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Life & fun · July 28, 2015

Our new Core Data book is in early access

objc.io publishes books, videos, and articles on advanced techniques for iOS and macOS development.

Our new Core Data book is in early access launched on July 28, 2015 with 13 votes, #1,649 of 4,208 launches that month and more than 75% of that year's launches. The site was still online in September 2026, 11 years on.

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In plain words

objc.io publishes a Core Data book currently in early access, offering practical guidance on Apple's persistence framework for iOS and macOS developers. The book covers Core Data fundamentals through advanced topics including relationships, multithreading, data syncing, and performance optimization. It uses a step-by-step example app approach to teach best practices while explaining how Core Data works internally. The resource is part of objc.io's broader collection of books, videos, and articles on advanced iOS and macOS development techniques.

written from the facts on this page · September 2026

From the sources

Core Data best practices by example, from persistency to multithreading and syncing. This book strives to give you clear guidelines for how to get the most out of Core Data while avoiding the pitfalls of this flexible and powerful framework. We start with a simple example app and extend it step by step as we talk about relationships, advanced data types, concurrency, syncing, and many other topics. Later on, we go well beyond what’s needed for the basic example app. We'll discuss in depth how Core Data works behind the scenes, how to get great performance, the trade-offs between different Core Data setups, and how to debug and profile your Core Data code. All code samples in this book are…from objc.io

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