I'm giving AppCode a try and opened my XCode project. In this project setup, at build time, additional header files are generated and placed in the derived data directory of the target. This all works fine and the build completes without problems, but AppCode fails to index those additional headers. The directory is correctly listed in the "User Header Search Paths" in the project settings. It also seems to expand correctly - but the actual imports in the source files are shown red. I did confirm that the header files are actually there - it seems that only the indexer is not taking them into account.
Is there a setting that I'm missing?