import UIKit var str = "Hello,playground" //枚举和结构体 enum Rank: Int{ case Ace = 1 case Two,Thress,Four,Five,Six,Seven,Eight,Nine,Ten case Jack,Queen,King func simpleDescription()->String{ switch self{ case .Ace: return "ace" case .Jack: return "jack" case .Queen: return "queen" case .King: return "king" default: return String(self.toRaw()) } } } let ace = Rank.Ace let aceRawValue = ace.toRaw() if let convertedRank = Rank.fromRaw(3) { let threeDescription = convertedRank.simpleDescription() } enum Suit { case Shades,Hearts,Diamonds,Clubs func simpleDescription()->String{ switch self{ case .Shades: return "shades" case .Hearts: return "hearts" case .Diamonds: return "diamonds" case .Clubs: return "clubs" } } } let hearts = Suit.Hearts let heart = hearts.simpleDescription() struct Card { var rank : Rank var suit : Suit func simpleDescription()->String{ return "The \(rank.simpleDescription()) of \(suit.simpleDescription())" } } let thressofSpades = Card(rank: .Three,suit: .Spades) let threeofSpadesDes = thressofSpades.simpleDescription enum ServerResponse{ case Result(String,String) case Error(String) } let success = ServerResponse.Result("6:00 am","8:09 pm") let failure = ServerResponse.Error("out of chees.") switch success{ case let .Result(sunrise,sunset): let serverResponse = "Sunrise is at \(sunrise) and sunset is at \(sunset)." case let .Error(error) let serverResponse = "Failure... \(error)" }
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