How do you detect when a file is changed in iCloud?

Programming for iPhone: How do you detect when a file is changed in iCloud? on newest questions tagged iphone – Stack Overflow

When a file is changed in iCloud (whether added, deleted, or the content changed), I would like to call a function I created, loadFiles, so that I can update my table view with the names of the new files. How am I notified of the file change? Do I need to listen for a NSNotification (if so, what is it?) or do I have to check manually? Thanks.

source: http://stackoverflow.com/questions/11287294/how-do-you-detect-when-a-file-is-changed-in-icloud
Programming for iPhone: programming-for-iphone