Automatically syncs NSUserDefaults across multiple iOS devices using iCloud key-value storage (NSUbiquitousKeyValueStore).

Drag all files into your Xcode project.

iCloud requires iOS 5.0 or later. If iCloud is not available, this code does nothing.

All write and remove requests to NSUserDefaults are automatically synchronized with iCloud. To prevent synchronization for individual keys, prefix the key with a ! (exclamation mark).

To respond to updates from iCloud you can observe the FTiCloudSyncDidUpdateNotification. It contains the NSUserDefaults object and in the userInfo a dictionary with FTiCloudSyncChangedKeys and FTiCloudSyncRemovedKeys. These are arrays of the changed and removed keys.

FTiCloudSync is compatible with InAppSettingsKit, a framework to easily add in-app settings to iPhone apps. InAppSettingsKit automatically updates the UI when an iCloud update is received.

Developed by Ortwin Gentz (Mastodon) and used in FutureTap’s Where To? and Streets apps – we eat our own dog food!

Licensed under CC-BY-SA 3.0.

You are free to share, adapt and make commercial use of the work as long as you give attribution and keep this license. To give credit, we suggest this text in the about screen or App Store description: "Uses FTiCloudSync by Ortwin Gentz", with a link to the GitHub page.

If you need a different license without attribution requirement, please contact me and we can work something out.

Includes:

• RegexKitLite by John Engelhart. Copyright © 2008-2010 John Engelhart. Licensed under the terms of the BSD License.
• MethodSwizzling by Mike Ash

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