Swift Cheat Sheet and Quick Reference Version 0.1. Copyright 2014 Ray Wenderlich. All rights reserved.Source: raywenderlich.com. Visit for more iOS resources and tutorials! Class Implementation class MyClass : OptionalSuperClass, OptionalProtocol1, OptionalProtocol2 { var myProperty:String var myOptionalProperty:String? // More properties... init() { myProperty = "Foo" } // More methods