Xcode 4 no code completion

I have 开发者_JAVA百科been using Xcode 4 for 2 weeks and I noticed that I don't get code completion macros for if-else and switch statements.

Like this article describes: http://macdevelopertips.com/xcode/xcode-code-completion-macros.html

I had it working in the beginning, but it suddenly stopped.

Have you tried deleting the project's derived data (which contains the project index used by Code Sense)?

To do so, open the organizer (Window -> 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.