#17 猜拳遊戲 App & 研究 Apple 的剪刀石頭布(RPS)範例

簡單實作黑白配小遊戲

功能

1. 可以調整獲勝的場次 (最少1場)
2. 顯示目前的跟電腦玩的比數
3. 依序判斷剪刀石頭布，再判斷方向性決定勝負

步驟

1. 準備畫面

2. 設置 IBOutlet 及 參數

let RSP = ["✌🏼", "✊🏻", "🖐🏻"]
let directions = ["👆", "👇", "👈", "👉"]
@IBOutlet weak var winGameLabel: UILabel!
@IBOutlet var winGameStepper: UIStepper!
var currentWinGame: Int = 1 {
    didSet {
        winGameLabel.text = "\(currentWinGame)"
    }
}
@IBOutlet weak var myWinLabel: UILabel!
@IBOutlet weak var computerWinLabel: UILabel!
@IBOutlet weak var computerShowLabel: UILabel!
@IBOutlet weak var myShowLabel: UILabel!
var myWin: Int = 0 {
    didSet {
        myWinLabel.text = "\(myWin)"
    }
}
var computerWin: Int = 0 {
    didSet {
        computerWinLabel.text = "\(computerWin)"
    }
}
var myRSP: String?
var myDirection: String?
var compRSP: String?
var compDirection: String?

3. 設置 IBAction 及 各函式

@IBAction func reset(_ sender: Any) {
    print(#function)
    newGame()
}
@IBAction func play(_ sender: UIButton) {
    if (myWin >= currentWinGame) ||
       (computerWin >= currentWinGame) {
        
        resetAlert()
        return
    }
    
    switch sender.tag {
    case 0,1,2:
        // RPS
        myRSP = RSP[sender.tag]
        compRSP = RSP.shuffled().first!
        myShowLabel.text = myRSP
        computerShowLabel.text = compRSP
        
        if myRSP == compRSP {
            let alert = UIAlertController(title: "Draw", message: "Play Again", preferredStyle: .alert)
            let closeAction = UIAlertAction(title: "Close", style: .default)
            alert.addAction(closeAction)
            present(alert, animated: true, completion: nil)
        }
        break
    case 3,4,5,6:
        // up, down, left, right
        myDirection = directions[sender.tag - 3]
        compDirection = directions.shuffled().first!
        
        myShowLabel.text = "\(myRSP!) \(myDirection!)"
        computerShowLabel.text = "\(compRSP!) \(compDirection!)"
        
        let (title, msg) = checkGame()
        
        let alert = UIAlertController(title: title, message: msg, preferredStyle: .alert)
        let closeAction = UIAlertAction(title: "Close", style: .default)
        alert.addAction(closeAction)
        if (myWin >= currentWinGame) ||
            (computerWin >= currentWinGame) {
            let resetAction = UIAlertAction(title: "New Game", style: .default) {_ in
                self.newGame()
            }
            alert.addAction(resetAction)
        }
        present(alert, animated: true, completion: nil)
        break
    default:
        break
    }
}
func resetAlert() {
    let alert = UIAlertController(title: "You Need to Reset", message: "Over WinGame Number : \(currentWinGame) !", preferredStyle: .alert)
    let closeAction = UIAlertAction(title: "Close", style: .default) {_ in
        self.newGame()
    }
    alert.addAction(closeAction)
    present(alert, animated: true, completion: nil)
}
@IBAction func changeWin(_ sender: UIStepper) {
    print(#function, sender.value)
    currentWinGame = Int(winGameStepper.value)
}
func checkGame() -> (String, String) {
    if myRSP == compRSP {
        return ("Draw", "Play Again")
    } else if (myRSP == "✌🏼" && compRSP == "🖐🏻") ||
              (myRSP == "✊🏻" && compRSP == "✌🏼") ||
              (myRSP == "🖐🏻" && compRSP == "✊🏻") {
        
        if myDirection == compDirection {
            myWin += 1
            return ("YOU Win", "Keep going...")
        } else {
            return ("Draw", "Play Again")
        }
        
    } else {
        if myDirection == compDirection {
            computerWin += 1
            return ("You Lose", "Good Luck...")
        } else {
            return ("Draw", "Play Again")
        }
    }
}
func newGame() {
    myWin = 0
    computerWin = 0
}

成果

GitHub

GitHub - rjjq/RPS_iosAPP