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

15. Taming iCloud

Only those who attempt the absurd can achieve the impossible.

Albert Einstein

In Chapter 14, “iCloud,” the basic steps to integrate Core Data with iCloud were demonstrated. Still, several areas need to be addressed to ensure that the user’s iCloud experience is as seamless as possible. For example, when multiple iCloud-enabled devices are in play, there’s a risk that some data may be duplicated. Techniques for handling data duplication will be discussed as they are implemented in Grocery Dude. You’ll also be shown how to seed iCloud from data found in a local “Non-iCloud” persistent store. This approach ensures that users don’t lose data when they start using iCloud for the first time, even if they had existing data on separate ...