I followed Claus\'s post to set up code coverage on Xcode 4.2 with LLVM 3.0. I\'m able to see test coverage files, but they\'re only for my unit test classes, not my actual
I use CoverStory http://code.google.com/p/coverstory/ a GUI for .gcda and .gcno files.
.gcda
.gcno
The documentation explains the settings needed to generate these files http://code.google.com/p/coverstory/wiki/UsingCoverstory.