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

14. iCloud

You never fail until you stop trying.

Albert Einstein

In Chapter 13, “Back Up and Restore with Dropbox,” a manual approach to storing data files “in the Cloud” was demonstrated using Dropbox. In this chapter, automatic data synchronization between user devices will be achieved using iCloud. Once Core Data is integrated with iCloud, changes made to application data on one user device will automatically be reflected on their other devices. At the time of writing, neither Dropbox nor iCloud allows data to be synchronized between accounts. If an application requires the ability for multiple accounts to synchronize with the same data, custom web service integration will be more appropriate than Dropbox or iCloud. Likewise, if an application ...