Git ignore file for Xcode projects

Question

Which files should I include in .gitignore when using Git in conjunction with Xcode?

Answer 1

For Xcode 5 I add:

####
# Xcode 5 - VCS metadata
#
*.xccheckout

From Berik's Answer

Answer 2

For Xcode 4 I also add:

YourProjectName.xcodeproj/xcuserdata/*
YourProjectName.xcodeproj/project.xcworkspace/xcuserdata/*