I am missing the .h-files when I just started my HelloWorld in MonoTouch/MonoDevelop. I have the same question as this guy, but the answer provided did not help me.
I just installed everything needed for MonoTouch on a MacBook running Lion. I followed the steps/instructions to install (see here) and then created a new solution.
But since there are no .h-files, this means that whem I use the interface Builder in Xcode, I only get the "No Assistant Result" when I open the "Assistant Builder".
I have tried to create the HelloWorlsViewController.h file manually, but it doesnt seem to help either.
EDIT Here is a screencast on DailyMotion that shows the problem: http://www.dailymotion.com/waggerdagger#videoId=xok9gs
Try Closing down XCode and MonoDevelop completely and then reopen MonoDevelop. That worked for me.
How are you opening the xib file in Xcode?
You need to double-click the xib file from within MonoDevelop so that MonoDevelop creates a fake project (with header files) for Xcode to use.
Problem for me was that I had moved Xcode out of Application folder to another folder. Moving it back fixed it for me.
来源：https://stackoverflow.com/questions/9240984/missing-h-files-and-assistant-editor-not-working-because-of-it-monotouch-monode