编辑代码

enum suit {
    case Spades,Hearts,Diamonds,Clubs
    func simpleDescription() -> String {
        switch self{
            case .Spades:
            return "spades"
            case .Hearts:
            return "hearts"
            case .Diamonds:
            return "diamonds"
            case .Clubs:
            return "clubs"
        }
    }
}
let hearts = Suit . Hearts
let heartsDescription = hearts.simpleDescription()