如何处理 tvOS 遥控器中的菜单按钮操作

Question

我的应用程序遇到了一个奇怪的问题。实际上，当我展示一个用于播放视频的视图控制器时。在视频加载时，用户按下菜单按钮，应用程序进入后台。虽然我已经覆盖了菜单按钮操作。

这是我的代码。

override func viewWillAppear(animated: Bool) {
    let menuPressRecognizer = UITapGestureRecognizer()
    menuPressRecognizer.addTarget(self, action: #selector(VideoPlayerViewController.menuButtonAction(_:)))
    menuPressRecognizer.allowedPressTypes = [NSNumber(integer: UIPressType.Menu.hashValue)]
    self.playerController.view.addGestureRecognizer(menuPressRecognizer)
}

func menuButtonAction(ges:UITapGestureRecognizer) {
    self.dismissView()
 }

Answer 1

当您指定 allowedPressTypes:

时，您应该使用枚举的 rawValue 而不是 hash

menuPressRecognizer = [NSNumber(value: UIPressType.menu.rawValue)]

Answer 2

这是我的代码，为我工作。

Swift 3

override func viewWillAppear(_ animated: Bool) {
    super.viewWillAppear(animated)
    let menuPressRecognizer = UITapGestureRecognizer()
    menuPressRecognizer.addTarget(self, action: #selector(YourViewController.menuButtonAction(recognizer:)))
    menuPressRecognizer.allowedPressTypes = [NSNumber(value: UIPressType.menu.rawValue)]
    self.view.addGestureRecognizer(menuPressRecognizer)
}

func menuButtonAction(recognizer:UITapGestureRecognizer) {
    self.dismiss(animated: true, completion: nil)
}

Swift 4

override func viewWillAppear(_ animated: Bool) {
    super.viewWillAppear(animated)
    let menuPressRecognizer = UITapGestureRecognizer()
    menuPressRecognizer.addTarget(self, action: #selector(YourViewController.menuButtonAction(recognizer:)))
    menuPressRecognizer.allowedPressTypes = [NSNumber(value: UIPressType.menu.rawValue)]
    self.view.addGestureRecognizer(menuPressRecognizer)
}

@objc func menuButtonAction(recognizer:UITapGestureRecognizer) {
    self.dismiss(animated: true, completion: nil)
}

Swift 4.2 & 5

override func viewWillAppear(_ animated: Bool) {
    super.viewWillAppear(animated)
    let menuPressRecognizer = UITapGestureRecognizer()
    menuPressRecognizer.addTarget(self, action: #selector(YourViewController.menuButtonAction(recognizer:)))
    menuPressRecognizer.allowedPressTypes = [NSNumber(value: UIPress.PressType.menu.rawValue)]
    self.view.addGestureRecognizer(menuPressRecognizer)
}

@objc func menuButtonAction(recognizer:UITapGestureRecognizer) {
    self.dismiss(animated: true, completion: nil)
}

Answer 3

当你想多次添加多个值时，你可以做简单的：

let pressTypes: [NSNumber] = [UIPressType.select, UIPressType.playPause, UIPressType.rightArrow].map{ NSNumber(value: [=10=].rawValue)}

Answer 4

这也可以在 IB 中完成。 TapGestureRecognizer 上有一个按钮选项，其中包括菜单按钮。

Answer 5

为了更细化，您还可以使用以下方法：

- (void)pressesBegan:(NSSet<UIPress *> *)presses withEvent:(nullable UIPressesEvent *)event NS_AVAILABLE_IOS(9_0);
- (void)pressesChanged:(NSSet<UIPress *> *)presses withEvent:(nullable UIPressesEvent *)event NS_AVAILABLE_IOS(9_0);
- (void)pressesEnded:(NSSet<UIPress *> *)presses withEvent:(nullable UIPressesEvent *)event NS_AVAILABLE_IOS(9_0);
- (void)pressesCancelled:(NSSet<UIPress *> *)presses withEvent:(nullable UIPressesEvent *)event NS_AVAILABLE_IOS(9_0);

如果您按照 Apple 的以下建议选择使用其中任何方法，请确保覆盖所有这些方法：

Generally, all responders which do custom press handling should override all four of these methods.

Your responder will receive either pressesEnded:withEvent or pressesCancelled:withEvent: for each

press it is handling (those presses it received in pressesBegan:withEvent:).

pressesChanged:withEvent: will be invoked for presses that provide an analog value (like thumbsticks or analog push buttons)

*** You must handle cancelled presses to ensure correct behavior in your application. Failure to do so is very likely to lead to incorrect behavior or crashes.

Answer 6

Swift 5:

private func setupRemoteGesture() {
    let tapRecognizer = UITapGestureRecognizer(target: self, action: #selector(handleMenuPress))
    tapRecognizer.allowedPressTypes = [NSNumber(value: UIPress.PressType.menu.rawValue)]
    view.addGestureRecognizer(tapRecognizer)
}

@objc private func handleMenuPress() {
    // Menu button pressed
}

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