enum Week: CaseIterable { case Sun case Mon case Tue case Wen case Thu case Fri case Sat } print(Week.allCases) //也可以重写allCases方法 enum Week2: CaseIterable { case Sun case Mon case Tue case Wen case Thu case Fri case Sat static var allCases: [Week2]{ return [.Mon, .Tue, .Wen, .Thu, .Fri, Sat, Sun] } } print(Week2.allCases)
原文：https://www.cnblogs.com/liuw-flexi/p/12625646.html