UISegmentedControl和GUI之間的互動邏輯在我的應用程式中不起作用

我嘗試在問答游戲中實作的功能如下所示：

這是SettingsViewController其中包含應用程式的設定，用戶可以在其中選擇difficulity游戲和sequence游戲使用的問題UISegmentedControl。

SettingsViewController包含這些用于實作此功能的方法：

@IBAction func didChooseDifficulty(_ sender: UISegmentedControl) {
    difficulityDelegate?.didChooseDifficulity(
                            difficulity: selectedDifficulty)
    UserDefaults.standard.set(
                            sender.selectedSegmentIndex,
                            forKey: "chosenDifficulity")
}
    
private var selectedDifficulty: Difficulty {
    switch self.difficultyControl.selectedSegmentIndex {
    case 0: return .easy
    case 1: return .hard
    case 2: return .insane
    default: return .hard
    }
}

@IBAction func didChooseSequence(_ sender: UISegmentedControl) {
    sequenceDelegate?.didChooseSequence(
                            sequence: selectedSequence)
    UserDefaults.standard.set(
                            sender.selectedSegmentIndex,
                            forKey: "chosenSequence")
}
    
private var selectedSequence: Sequence {
    switch self.sequenceControl.selectedSegmentIndex {
    case 0: return .sequentally
    case 1: return .shuffled
    default: return .sequentally
    }
}

override func viewDidLoad() {
    super.viewDidLoad()
    setupQuestionsSequence()
    setupDifficulty()
}

func setupQuestionsSequence() {
    if let sequence = UserDefaults.standard.value(
                                        forKey: "chosenSequence") {
        let selectedIndex = sequence as! Int
        sequenceControl.selectedSegmentIndex = selectedIndex
    }
}
    
func setupDifficulty() {
    if let difficulity = UserDefaults.standard.value(
                                    forKey: "chosenDifficulity") {
        let selectedIndex = difficulity as! Int
        difficultyControl.selectedSegmentIndex = selectedIndex
    }
}

我在這里使用DifficulityDelegateandChooseQuestionsSequenceDelegate協議：

protocol DifficulityDelegate: AnyObject {
    func didChooseDifficulity(
        difficulity: Difficulty)
}

protocol ChooseQuestionsSequenceDelegate: AnyObject {
    func didChooseSequence(
        sequence: Sequence)
}

這里也是GameDelegate協議，我使用的游戲的主要協議：

protocol GameDelegate: AnyObject {
    func didEndGame(
        difficulty: Difficulty,
        withScore score: Int,
        name: String,
        removeTwoUsed: Bool,
        callFriendUsed: Bool,
        audienceHelpUsed: Bool)
}

這是GameSession用于游戲主要邏輯的類：

class GameSession {
    var questionNumber: Int = 0
    var callFriendUsed = false
    var audienceHelpUsed = false
    var removeTwoUsed = false
    var difficulty: Difficulty = .hard
    var sequence: Sequence = .sequentally
}

這是Question有問題的結構：

struct Question: Codable {
    let question: String
    let answers: [String]
    let rightAnswer: Int
    let difficulty: Difficulty
}

這是GameViewController游戲本身發生的主控制器。我需要了解為什么當我改變UISegmentedControl狀態時什么都沒有發生。游戲沒有任何變化，difficulty問題sequence的出現。

這是來自的一些代碼GameViewController：

weak var delegate: GameDelegate?
weak var sequenceDelegate: ChooseQuestionsSequenceDelegate?
weak var difficulityDelegate: DifficulityDelegate?
private var questions = [Question]()

var gameSession = GameSession()
var score = 0
var questionNumber = Observable<Int>(0)

var difficulty: Difficulty = .hard {
        didSet {
            gameSession.difficulty = difficulty
        }
    }
    
var sequence: Sequence = .sequentally {
    didSet {
        gameSession.sequence = sequence
    }
}
    
private var chooseDifficultyStrategy: DiffilultyStrategy {
    switch difficulty {
    case .easy: return EasyModeStrategy()
    case .hard: return HardModeStrategy()
    case .insane: return InsaneModeStrategy()
    }
}

private var setupSelectedSequence: SequenceStrategy {
    switch sequence {
    case .sequentally: return SequentiallyStrategy()
    case .shuffled: return ShuffledStrategy()
    }
}

func initialSetup() {
    delegate = Game.instance
    Game.instance.gameSession = gameSession
    questions = chooseDifficultyStrategy.setupGame(
        lifelineButtons: lifelineButtonsCollection)
    questions = setupSelectedSequence.setupGame()
}

這可能很愚蠢，如果有人能幫助我理解我做錯了什么，我會很高興。謝謝！

uj5u.com熱心網友回復：

籠統地說，我想說協議和委托機制不是這里想要的。與用戶偏好互動的視圖控制器 GameViewController 和 SettingsViewController 不一定同時存在，因此它們無法相互通信。

更可能需要一些中央存盤庫，SettingsViewController 可以在其中寫下用戶的愿望，而 GameViewController 可以讀取它們。保存此類首選項的常見位置是 UserDefaults；它的優點是它會隨著時間的推移持續存在，即使在應用程式啟動之間也是如此，并且它是全球可用的（這意味著任何地方的任何代碼都可以與之互動）。

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