编辑代码

if let convertedRank = Rank(rawValue: 3) {
    lte threeDescription = convertedRank.simpleDescription()
}


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