One of the issues that you may run into when updating your apps to utilize the iOS 5 SDK is storing user settings in iCloud. To do this requires usage of the NSUbiquitousKeyValueStore which allows you to store a small amount of config data to iCloud.
Fortunately, Mugunth Kumar has released an open source library that makes synchronized your app’s NSUserDefaults to iCloud dead simple.
You simply import the library, and add one line of code, and the rest of your code does not need to be modified.
You can find the library on Mugunth’s site with a short usage guide here.
Definitely a very useful library if your app requires any user configuration.
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