回答編集履歴
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ソースコードを追記
answer
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@@ -1,4 +1,77 @@
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こんにちは。
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アプリのチュートリアルサイト（[リンク](http://codewithchris.com/how-to-make-an-iphone-app/)）からソースコードをダウンロードして検証してみてはいかがでしょうか。
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![イメージ説明][WIDTH:600](6f1c715dacce41990b8ac755c3791a35.jpeg)
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![イメージ説明][WIDTH:600](6f1c715dacce41990b8ac755c3791a35.jpeg)
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ちなみに、ViewController.swiftのソースコードは下記のとおりです。
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```lang-Swift
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import UIKit
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class ViewController: UIViewController {
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@IBOutlet weak var firstCardImageView: UIImageView!
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@IBOutlet weak var secondCardImageView: UIImageView!
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@IBOutlet weak var playRoundButton: UIButton!
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@IBOutlet weak var backgroundImageView: UIImageView!
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@IBOutlet weak var playerScore: UILabel!
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@IBOutlet weak var enemyScore: UILabel!
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var cardNamesArray:[String] = ["ace", "card2", "card3", "card4", "card5", "card6", "card7", "card8", "card9", "card10", "jack", "queen", "king"]
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var playerScoreTotal = 0
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var enemyScoreTotal = 0
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override func viewDidLoad() {
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super.viewDidLoad()
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// Do any additional setup after loading the view, typically from a nib.
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}
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override func didReceiveMemoryWarning() {
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super.didReceiveMemoryWarning()
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// Dispose of any resources that can be recreated.
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}
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@IBAction func playRoundTapped(sender: UIButton) {
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// Randomize a number for the first imageview
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var firstRandomNumber:Int = Int(arc4random_uniform(13))
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// Construct a string with the random number
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var firstCardString:String = self.cardNamesArray[firstRandomNumber]
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// Set the first card image view to the asset corresponding to the randomized number
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self.firstCardImageView.image = UIImage(named: firstCardString)
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// Randomize a number for the second imageview
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var secondRandomNumber:Int = Int(arc4random_uniform(13))
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// Construct a string with the random number
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var secondCardString:String = self.cardNamesArray[secondRandomNumber]
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// Set the second card image view to the asset corresponding to the randomized number
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self.secondCardImageView.image = UIImage(named: secondCardString)
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// Determine the higher card
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if firstRandomNumber > secondRandomNumber {
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// TODO: first card is larger
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playerScoreTotal += 1
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self.playerScore.text = String(playerScoreTotal)
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}
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else if firstRandomNumber == secondRandomNumber {
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// TODO: numbers are equal
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}
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else {
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// TODO: second card is larger
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enemyScoreTotal += 1
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self.enemyScore.text = String(enemyScoreTotal)
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}
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}
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}
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77
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```
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