Inverse UML diagram designed from an iOS project

Question

Possible duplicate:
How can I generate UML diagrams from Xcode4

I need to create UML diagrams from iOS projects. Is there a tool for this that can reverse engineer code and create class diagrams and UML.

I have a huge project that we have created over the past 1 year, and now we have to create

Documentation.

Thank you Pradeep.