Apple TV希伯来语RTL应用数字键盘与退格键重叠问题求助

针对系统语言为英文、应用语言为希伯来语（RTL布局）时，Apple TV默认数字键盘的数字1被退格键遮挡的问题，提供以下几种可落地的解决思路：

1. 手动偏移退格键位置 #

通过遍历键盘视图层级找到退格键，在特定场景下调整其frame，避开数字键：

override func viewDidAppear(_ animated: Bool) {
    super.viewDidAppear(animated)
    let appLang = Bundle.main.preferredLocalizations.first ?? ""
    let systemLang = Locale.current.language.languageCode?.identifier ?? ""
    
    // 仅在目标异常场景执行调整
    guard appLang == "he", systemLang != "he" else { return }
    adjustBackspaceButtonPosition()
}

private func adjustBackspaceButtonPosition() {
    // 定位键盘窗口
    guard let keyboardWindow = UIApplication.shared.windows.first(where: {
        $0.isKeyWindow && $0.description.contains("Keyboard")
    }) else { return }
    
    // 遍历子视图找到退格键（可根据实际accessibilityLabel或类名调整匹配逻辑）
    for subview in keyboardWindow.subviews.flatMap({ $0.subviews }) {
        if subview.accessibilityLabel == "Delete" {
            var adjustedFrame = subview.frame
            // 根据实际遮挡程度调整偏移量，示例向右移40pt
            adjustedFrame.origin.x += 40
            subview.frame = adjustedFrame
            break
        }
    }
}

注意：该方案依赖系统键盘的视图结构，若Apple后续修改键盘实现，可能需要同步调整匹配逻辑。

2. 强制键盘使用LTR布局 #

在异常场景下临时强制键盘采用左到右布局，规避RTL布局冲突：

override func viewWillAppear(_ animated: Bool) {
    super.viewWillAppear(animated)
    let appLang = Bundle.main.preferredLocalizations.first ?? ""
    let systemLang = Locale.current.language.languageCode?.identifier ?? ""
    
    if appLang == "he" && systemLang != "he" {
        UIView.appearance().semanticContentAttribute = .forceLeftToRight
    }
}

override func viewWillDisappear(_ animated: Bool) {
    super.viewWillDisappear(animated)
    // 离开页面后恢复默认语义设置，避免影响其他界面
    UIView.appearance().semanticContentAttribute = .unspecified
}

3. 自定义数字键盘组件 #

如果依赖系统键盘的方案稳定性不足，完全自定义符合RTL要求的数字键盘是最稳妥的方式：

class CustomTVDigitKeyboard: UIView {
    // 定义数字按钮和退格按钮的回调闭包
    var digitTapped: ((String) -> Void)?
    var backspaceTapped: (() -> Void)?
    
    override init(frame: CGRect) {
        super.init(frame: frame)
        setupKeyboardLayout()
    }
    
    required init?(coder: NSCoder) {
        super.init(coder: coder)
        setupKeyboardLayout()
    }
    
    private func setupKeyboardLayout() {
        backgroundColor = .darkGray
        // 使用AutoLayout构建RTL布局的键盘：数字键按希伯来语习惯排列，退格键放在视觉左上角
        // 示例：创建1-9的网格按钮，0在底部中间，退格键在右上角（RTL下对应视觉左上角）
        // 此处省略具体按钮创建和约束代码，可根据Apple TV遥控器交互逻辑适配
    }
}

在TVDigitEntryViewController中替换系统键盘：

class TVDigitEntryViewController : UIViewController {
    @IBOutlet weak var pinTextField: UITextField!
    private let customKeyboard = CustomTVDigitKeyboard()
    
    override func viewDidLoad() {
        super.viewDidLoad()
        let appLang = Bundle.main.preferredLocalizations.first ?? ""
        let systemLang = Locale.current.language.languageCode?.identifier ?? ""
        
        if appLang == "he" && systemLang != "he" {
            pinTextField.inputView = customKeyboard
            // 绑定回调处理输入逻辑
            customKeyboard.digitTapped = { [weak self] digit in
                self?.pinTextField.text?.append(digit)
            }
            customKeyboard.backspaceTapped = { [weak self] in
                self?.pinTextField.text?.removeLast()
            }
        }
    }
}

4. 修正视图控制器语义属性 #

尝试统一视图控制器的语义内容属性，确保键盘布局与界面语义匹配：

override func viewDidLoad() {
    super.viewDidLoad()
    let appLang = Bundle.main.preferredLocalizations.first ?? ""
    let systemLang = Locale.current.language.languageCode?.identifier ?? ""
    
    if appLang == "he" && systemLang != "he" {
        view.semanticContentAttribute = .forceRightToLeft
        pinTextField.semanticContentAttribute = .forceRightToLeft
    }
}

内容的提问来源于stack exchange，提问作者Ganesh Arumugam