Cheat Sheet / Updated 03-22-2022
Swift is Apple’s programming language for developers to use with iOS and OS X devices.Swift has been designed both to work alongside its predecessor, Objective-C, and to one day be Objective-C’s replacement. When you develop apps for iOS or OS X, you use the Xcode development tool (technically an Integrated Development Environment, or IDE), the Cocoa or Cocoa Touch frameworks, and a programming language —either Objective-C or Swift.