Git ignore file for Xcode projects

Question

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

Answer 1

The people of GitHub have exhaustive and documented .gitignore files for Xcode projects:

Swift: https://github.com/github/gitignore/blob/master/Swift.gitignore

Objective-C: https://github.com/github/gitignore/blob/master/Objective-C.gitignore