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Learning Core Data for iOS: A Hands-On Guide to Building Core Data Applications by Tim Roadley

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11. Background Processing

Everything must be made as simple as possible, but not simpler.

Albert Einstein

In Chapter 10, recommendations were given on how to configure a managed object model for optimal performance. Measuring performance with Instruments was also demonstrated. Full size photos were removed from the item table-view cells and yet there are no thumbnails in their place. The process to create thumbnails from photos will be intensive, so cannot be performed in the foreground. Thumbnail creation aside, even the simple act of saving a context has the potential to impact the user interface if there are many changes to commit. This chapter will use the example of thumbnail generation to demonstrate how to perform an intensive task using ...

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