How to reset warnings in Xcode 4

Question

Is there a way to reset all warnings/errors in a Xcode 4 project? Xcode 4 shows me errors and warnings e.g. Unused variable \'pageType\' which is has been remov

Answer 1

Probably time to remove the project's derived data. Open the organizer, then the Projects tab. Select your project then hit the delete button next to the derived data path (to the right). Confirm and let it re-index your project.