swift三-列挙と構造体
2968 ワード
// enum , ,
enum Rank:NSInteger {
case Ace = 1
case Two, Three, 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.rawValue)
}
}
}
let ace = Rank.Ace
let aceRawValue = ace.rawValue
print(ace,aceRawValue)
// ,swift 0 1 , 。 ,Ace 1, , 。 rawValue 。
// init?(rawValue)
if let converterRank = Rank(rawValue:3) {
let threeDescription = converterRank.simpleDescription()
print(threeDescription)
}
// , , , ,
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()
print(heartsDescription)
// : Hearts , hearts , Suit.Hearts , 。 switch , .Hearts , self suit,
// , , 。 : ,
// : ,
enum ServerRespone {
case Result(String,String)
case Failure(String)
}
let success = ServerRespone.Result("6:00 am", "8:00 pm")
let failure = ServerRespone.Failure("out of cheese")
switch success {
case let .Result(sunrise,sunset):
let serverResponse = "Sunnrise is at \(sunrise) and sunset is at \(sunset)"
print("Success... \(serverResponse)")
case let .Failure(message):
print("Failure... \(message)")
}
// struct , , 。 ,
struct Card {
var rank:Rank
var suit:Suit
func simpleDescription() -> String {
return "The \(rank.simpleDescription()) of \(suit.simpleDescription())"
}
}
let ThreeOfSpades = Card(rank: .Three,suit: .Spades)
let threeSpadesDescription = ThreeOfSpades.simpleDescription()
print(threeSpadesDescription)