iOS provides a framework to share documents between your application & iTunes. Check out the Core Services Layer section of the Apple docs, specifically the File-Sharing Support section. It explains how to do this:
- Add the UIFileSharingEnabled key to your application’s Info.plist file and set the value of the key to YES.
- Put whatever files you want to share in your application’s Documents directory.
On a side note, if this is just for debugging, you can always print logs using the default NSLog function and check the output using OS X's Console.