What you need for this book
This book uses the Xcode IDE, version 8.2.1 (Swift 3). If you use a different version of Xcode, you will likely encounter syntax differences; Apple is constantly upgrading Swift’s syntax. You can use Xcode’s Edit > Convert > To Current Swift Syntax to update the code examples in this book to a newer version of Xcode.
Visit https://developer.apple.com/xcode/ to download Xcode.
You will need an Apple developer account to integrate your apps with the Game Center and submit your games to the App Store.