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copied!<p>There is no reason to store documents both in local storage as well as in iCloud. However, you should give users the option of turning iCloud storage off. With iCloud storage off, you should only look for files in local storage (as with pre-iOS5 apps). The best thing is to try to isolate the part of your code that needs to know where documents are stored, and have it test whether or not iCloud is available and enabled and have that piece of code return the URL where documents should be stored.</p> <p><strong>Update:</strong> If you want to diverge for iOS5 vs. iOS4, you just need to test if the iOS5 features are there. There are several ways that you can do this. One way is to check:</p> <p><code>if ([UIDocument class] == nil)</code></p> <p>On iOS4 this will be true, and on iOS5 this will be false. I don't know what kind of datastructures you have for your files, but one thing you could do is create a wrapper around UIDocument. Inside this wrapper class, you could have instance variables for a UIDocument structure as well as for fields you would need in IOS4 (such as the path to the file). When you instantiate your class, test whether iCloud is enabled and if UIDocument is available, and if so, use it and set the field. Otherwise, set the other fields and leave the UIDocument field to be nil. When you need to do operations on your "file", test if the UIDocument field is nil, and if it is do it the "old" way. Otherwise, just pass on the request to the UIDocument object.</p>

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