BlackJack App

目的：練習UIAlertController、 UIAlertAction、MVC架構

重點整理：

創建五十二張卡片

let suits = ["♣️", "♦️", "♥️", "♠️"]
let ranks = ["A", "2", "3", "4", "5", "6", "7", "8", "9", "10", "J", "Q", "K"]

var cards = [Card]()

struct Card {
    var suit = ""
    var rank = ""
}

func addCard() {
    for rank in ranks {
        for suit in suits {
            var card = Card()
            card.rank = rank
            card.suit = suit
            cards.append(card)
        }
    }
}

判斷卡片的數字

func calculateRankNumber(card: Card) ->Int {
        var cardRankNumber = 0
        switch card.rank{
        case "A":
            cardRankNumber = 1
        case "J","Q","K":
            cardRankNumber = 10
        default:
            cardRankNumber = Int(card.rank)!
        }
        return cardRankNumber
    }

判斷輸贏，完整程式碼放在GitHub

if bankerScore > playerScore && bankerScore <= 21 {
  let controller = UIAlertController(title: "You Lose", message: "Banker:\(bankerScore)\nPlayer:\(playerScore)", preferredStyle: .alert)
  let action = UIAlertAction(title: "Play Again", style: .default) { action in
    self.initGame() //這裡是closure所以funtion前面加self.
    }
 controller.addAction(action)
 present(controller, animated: true) 

賭金選擇使用UISegmentedControl

func betPlus() { //玩家贏
  if betNum.selectedSegmentIndex == 0 {
    bet += 50
    betLabel.text = String(bet)
  } else {
      bet += 100
      betLabel.text = String(bet)
    }
}

func betMinus() { //玩家輸
  if betNum.selectedSegmentIndex == 0 {
    bet -= 50
    betLabel.text = String(bet)
  } else {
      bet -= 100
      betLabel.text = String(bet)
     }
}

Demo：

GitHub：

GitHub - HanYian/BlackJack

參考資料：

#22 二十一點亞洲慈善撲克王大賽