Swift学习小结之枚举和结构体

概述import UIKitvar 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{

import UIKitvar 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.Acelet 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.Heartslet 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.simpleDescriptionenum 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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