Swift3.0基础语法学习<三>

枚举和结构体：

 //
 //  ViewController3.swift
 //  SwiftBasicDemo
 //
 //  Created by 思 彭 on 16/11/16.
 //  Copyright © 2016年 思 彭. All rights reserved.

 // 枚举和结构体

 import UIKit

 class ViewController3: UIViewController {

     override func viewDidLoad() {
         super.viewDidLoad()
         self.title = "枚举和结构体"
         // 1. 枚举的使用
         let ace = Rank.ace
         print(ace)  // ace
         let acrRawValue = ace.rawValue
         print(acrRawValue)   //

         if let convertedRank = Rank(rawValue: ) {

             let threeDescription = convertedRank.simpleDescription()
             print(threeDescription)   //
         }

         // 2.
         let hearts = Suit.hearts
         let heartedDescription = hearts.simpleDescription()
         print("heartedDescription = \(heartedDescription)")

         // 3.
         let success = ServerResponse.result("6:00 am", "8:09 pm")
         let failure = ServerResponse.failure("Out of cheese.")

         switch success {
         case let .result(sunrise, sunset):
             print("Sunrise is at \(sunrise) and sunset is at \(sunset).")
         case let .failure(message):
             print("Failure...  \(message)")

         }
         // 4.结构体
         let structVar = Card(rank: .ace, suit: .hearts)
         print(structVar.simpleDescription())

     }

     // 定义枚举
     enum Rank: Int {
         case ace =
         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)
             }
         }
     }
     // 定义枚举
     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"
             }
         }
     }

     // 定义枚举元组
     enum ServerResponse {
         case result(String, String)
         case failure(String)
     }

     // 定义结构体
     struct Card {
         var rank: Rank
         var suit: Suit
         func simpleDescription() -> String {

             return "The \(rank.simpleDescription()) of \(suit.simpleDescription())"
         }
     }
 }