Because I was not able to see the deallocating messages, I set Objective-C ARC to yes as others have suggested. But after that, I got a build failed error when it was fine before I set it to ARC yes. The error shows this:
Apple Mach-O Linker (ld) Error
Command /Developer/usr/bin/clang failed with exit code 1
Any ideas to how i can fix this problem? much thanks!