Xcode 4 code sense is not working

Question

I am running a \"old\" Xcode 3 project in Xcode 4 and code sense is not working for my own classes. I have tried following:

• Clean/rebuild
• Remove Der

Answer 1

I open a second project in the background whenever my Xcode's code sensing stops working (it usually works the first time i open the project but after a while code sense no longer works). So what i do is to open a second project in Xcode. Xcode will start indexing the second project and magically the code sense for my main project is back.

Running Xcode 4.3.1 on Lion

Hope this helps someone.