Is there a way I can compare code in an old Xcode project with a new Xcode project?

I have a developer who has been working on an old Xcode project for me. Is there a simple way I can compare files in his new Xcode project to the o开发者_如何学JAVAnes in the new Xcode project to quickly see which changes he's done and how the old code has changed? He's be procrastinating and finally i have twisted his arm to send me the new Xcode project. He claims that the old code was rubbish, including the old coder too, so I'd like to see if he's actually done any changes to the old guy's project or is just plain and simple, 'a talker'.

Sure, use the "diff" command (from a terminal window).

If the two projects are in folders "old-project" and "new-project", respectively, you would do something like:

diff -r old-project new-project

The "-r" will recursively compare corresponding files in subdirectories.

ps. this should also be a wake-up call to you that's it's time to put your project into some kind of version control system (such as svn). If you had your project in source control, there would not be any question about exactly what had been changed, when, and by whom.

you can use FileMerge. it is under Developer/Applications/Utilities/FileMerge