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.

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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.