18. iCloud Basics

Ready to emerge from the confines of a single device or desktop system? Welcome to iCloud. iCloud lets you share data beyond the limitations of individual hardware and into a central data-storage hub. With iCloud, your applications can access and update shared documents without explicit synchronization. Changes on one unit propagate out to all other registered systems, updating when that hardware next accesses the Internet. This completely passive coordination is yours for free via iCloud. All you need to do is set up some entitlements and incorporate its features in your applications. It’s surprisingly easy to use. This chapter introduces iCloud, shows you how it works, introduces the key classes you’ll use, and walks you through ...

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