Introduction

The world has gone mobile, and it seems that iOS apps lead the charge. People use their iPhone, iPads, and soon their Apple Watches to consume, produce, and store a diversity of information. As you develop applications to run on these Apple devices, you’ll appreciate the polish that Apple has spread on its persistence framework: Core Data. No other mobile platform offers a persistence layer that approaches Core Data’s power, ease of use, or flexibility. With each release of the iOS Software Development Kit (SDK), Apple grows and improves the Core Data framework.

We’ve written and rewritten this book several times as Core Data has continued to grow. Last summer, as we neared completion of this book, Apple surprised us all with the ...

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