for my App I\'d like to have a debug view that I want to have only in debug-builds and not in release builds. I don\'t want to change my code though. Thats why i am wonderin
Check your projects build settings for debug to ensure that 'DEBUG' is being set - Apple gives you this for free - do this by selecting the project and clicking on the build settings tab. Search for 'DEBUG' and look to see if indeed DEBUG is being set.

then conditionally code for DEBUG in your source files
#ifdef DEBUG
// Something to log your data here or even add a whole subview to see it on the device
#else
//
#endif