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More iPhone 3 Development: Tackling iPhone SDK 3 by Jeff LaMarche, Dave Mark

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Chapter 7. Relationships, Fetched Properties, and Expressions

Welcome to the final chapter on Core Data. So far, our application includes only a single entity: Hero. In this chapter, we're going to show you how managed objects can incorporate and reference other managed objects through the use of relationships and fetched properties. This will give you the ability to make applications of much greater complexity than our current SuperDB application. That's not the only thing we're going to do in this chapter, however.

Throughout the book, we've endeavored to write our code in a generic fashion. We created our HeroEditController, for example, so that the structure and content were completely controlled by a handful of arrays, and we implemented error ...

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