I'm not sure if you can paint directly in the status bar, but you can paint on top of it in a user view. You can get the status bar frame using:
CGRect statusBarFrame = [[UIApplication sharedApplication] statusBarFrame];
And you can get the main application window (presumably viewing the status bar) using:
UIWindow *mainWindow = [[UIApplication sharedApplication] keyWindow];
. , , "" , Reeder.