如何在 SpriteKit SKScene 类中启动 ReplayKit 屏幕录制

Question

我已经在我的SpriteKit 游戏中实现了ReplayKit，但由于一切都在GameViewController 内完成，因此录制按钮出现得太早了。请在下面查看我的GameViewController 课程：

class GameViewController: UIViewController, RPPreviewViewControllerDelegate {

var videoRecButton: UIButton!
var videoRecImage: UIImage!

override func viewDidLoad() {
    super.viewDidLoad()

    let skView = self.view as? SKView

    if skView?.scene == nil  {
        skView?.showsFPS = true
        skView?.showsNodeCount = true
        skView?.showsPhysics = true
        skView?.ignoresSiblingOrder = false

        //starting the game with the Poster Scene
        let posterScene = PosterScene(size: skView!.bounds.size)
        posterScene.scaleMode = .aspectFill
        skView?.presentScene(posterScene)
    }

    videoRecButton = UIButton(type: .custom)
    videoRecImage = UIImage(named:"videoRecButton.png")

    videoRecButton.frame = CGRect(x:0, y: 0, width: (videoRecImage?.size.width)!, height: (videoRecImage?.size.height)!)
    videoRecButton.setImage(videoRecImage, for: .normal)
    videoRecButton.addTarget(self, action:#selector(self.videoRecButtonClicked), for: .touchUpInside)
    self.view.addSubview(videoRecButton)
}

func videoRecButtonClicked() {
    print("Button Clicked")
    startRecording()
}

func startRecording() {
    let recorder = RPScreenRecorder.shared()

    recorder.startRecording{ [unowned self] (error) in
        if let unwrappedError = error {
            print(unwrappedError.localizedDescription)
        } else {

            self.videoRecButton.addTarget(self, action:#selector(self.stopRecording), for: .touchUpInside)
        }
    }
}

func stopRecording() {
    let recorder = RPScreenRecorder.shared()

    recorder.stopRecording { [unowned self] (preview, error) in
        self.navigationItem.rightBarButtonItem = UIBarButtonItem(title: "Start", style: .plain, target: self, action: #selector(self.startRecording))

        if let unwrappedPreview = preview {
            unwrappedPreview.previewControllerDelegate = self
            self.present(unwrappedPreview, animated: true)
        }
    }
}

func previewControllerDidFinish(_ previewController: RPPreviewViewController) {
    dismiss(animated: true)
}

override var shouldAutorotate: Bool {
    return true
}

override var supportedInterfaceOrientations: UIInterfaceOrientationMask {
    if UIDevice.current.userInterfaceIdiom == .phone {
        return .allButUpsideDown
    } else {
        return .all
    }
}

override func didReceiveMemoryWarning() {
    super.didReceiveMemoryWarning()
    // Release any cached data, images, etc that aren't in use.
}

override var prefersStatusBarHidden: Bool {
    return true
}
}

1. 如何从继承自 SKScene 的类（如 GameScene 类）调用 startRecording 和 stopRecording 函数？

2. 如何在GameScene 类中启用、禁用和隐藏videoRecButton 按钮？

更新

根据 crashoverride777 的回答，a 在我的 SKScene 类中放置了以下代码，但屏幕会记录几秒钟，然后导航控制器会显示已录制视频的预览。录制的视频只是黑屏，取消和保存按钮没有响应。

    func startRecording() {
    let recorder = RPScreenRecorder.shared()

    if #available(iOS 10.0, *) {
        recorder.startRecording{ [unowned self] (error) in
            if let unwrappedError = error {
                print(unwrappedError.localizedDescription)
            } else {

                self.stopRecording()

            }
        }
    } else {
        // Fallback on earlier versions
    }
}

func stopRecording() {
    let recorder = RPScreenRecorder.shared()

    recorder.stopRecording { [unowned self] (preview, error) in
        self.view?.window?.rootViewController?.navigationItem.rightBarButtonItem = UIBarButtonItem(title: "Start", style: .plain, target: self, action: #selector(self.startRecording))

        if let unwrappedPreview = preview {
            unwrappedPreview.previewControllerDelegate = self
            self.view?.window?.rootViewController?.present(unwrappedPreview, animated: true)
        }
    }

}

func previewControllerDidFinish(_ previewController: RPPreviewViewController) {
    view?.window?.rootViewController?.dismiss(animated: true)
}

我创建了一个录制按钮：

let videoRecButtonSprite = SKSpriteNode(imageNamed: "videoButton")
videoRecButtonSprite.position = CGPoint(x: self.frame.width/15, y: self.frame.height - self.frame.height/12)
self.addChild(videoRecButtonSprite)

override func touchesBegan(_ touches: Set<UITouch>, with event: UIEvent?) {

    for touch: AnyObject in touches {
        let location = touch.location(in: self)
        if videoRecButtonSprite.contains(location){
            startRecording()
        }
    }
}

Answer 1

你不应该在 GameViewController 中创建你的按钮，直接在你的 SKScene 中创建它。在 SpriteKit 游戏中将 GameViewController 用于 UI 并不是一个好习惯。

有很多关于如何在 SpriteKit 中创建按钮的教程。

关于 ReplayKit，你可以直接在你想要的 SKScene 中使用它，只需将你已有的代码移动到相关的场景中即可。

要在 SKScene 中显示预览视图控制器，您可以这样说

view?.window?.rootViewController?.present(unwrappedPreview, animated: true)

我还注意到您在停止录制后会显示视图控制器。你确定要这样做吗？通常，您的游戏结束菜单中有一个单独的按钮，您可以在其中观看录制。

这是通用代码。我还建议您查看苹果示例游戏 DemoBots。

我个人使用 Singleton 类来管理录制，这样管理器更容易调用所有方法，以防您在不同场景中需要它。要开始课程，请创建一个新的 swift 文件并添加此代码。

 class ScreenRecoder: NSObject {

      /// Shared instance
      static let shared = ScreenRecorder()

      /// Preview controller
      var previewController: RPPreviewViewController?

      /// Private singleton init
      private override init() { }
 }

要开始录制，请将此方法添加到 ScreenRecorder 类。

func start() {
    let sharedRecorder = RPScreenRecorder.shared()

    // Do nothing if screen recording is not available
    guard sharedRecorder.isAvailable else { return }

    // Stop previous recording if necessary
    if sharedRecorder.isRecording {
        stopScreenRecording()
    }

    print("Starting screen recording")

    // Register as the recorder's delegate to handle errors.
    sharedRecorder.delegate = self

    // Start recording
    if #available(iOS 10.0, *) {
        #if os(iOS)
            sharedRecorder.isMicrophoneEnabled = true
            //sharedRecorder.isCameraEnabled = true // fixme
        #endif

        sharedRecorder.startRecording { [unowned self] error in
            if let error = error as? NSError, error.code != RPRecordingErrorCode.userDeclined.rawValue {
                print(error.localizedDescription)
                // Show alert
                return
            }
        }
    } else {
        // Fallback on earlier versions
        sharedRecorder.startRecording(withMicrophoneEnabled: true) { error in
            if let error = error as? NSError, error.code != RPRecordingErrorCode.userDeclined.rawValue {
                print(error.localizedDescription)
                // Show alert
                return
            }
        }
    }
}

要停止录音，请调用此按钮。您注意到我实际上还没有显示预览，我只是将其存储以供以后使用。这是您通常的做法。

 func stop() {
    let sharedRecorder = RPScreenRecorder.shared()

    // Do nothing if screen recording is not available
    guard sharedRecorder.isAvailable else { return }

    // Stop recording
    sharedRecorder.stopRecording { [unowned self] (previewViewController, error) in
        if let error = error {
            // If an error has occurred, display an alert to the user.
            print(error.localizedDescription)
            // Show alert
            return
        }

        print("Stop screen recording")

        if let previewViewController = previewViewController {
            // Set delegate to handle view controller dismissal.
            previewViewController.previewControllerDelegate = self

            /*
             Keep a reference to the `previewViewController` to
             present when the user presses on preview button.
             */
            self.previewViewController = previewViewController
        }
    }
}

比在符合 ReplayKit 委托的 ScreenRecorder 类中创建 2 个扩展。

预览控制器委托

 /// RPPreviewViewControllerDelegate
 extension ScreenRecorder: RPPreviewViewControllerDelegate {

     /// Preview controller did finish
    func previewControllerDidFinish(_ previewController: RPPreviewViewController) {
          previewController.dismiss(animated: true, completion: nil)
    }
}

和录音委托

extension ScreenRecorder: RPScreenRecorderDelegate {

      /// Screen recoder did stop with error
      func screenRecorder(_ screenRecorder: RPScreenRecorder, didStopRecordingWithError error: Error, previewViewController: RPPreviewViewController?) {

         // Display the error the user to alert them that the recording failed.
        let error = error as NSError
        if error.code != RPRecordingErrorCode.userDeclined.rawValue {
            print(message: error.localizedDescription)
            // show alert
        }

         // Hold onto a reference of the `previewViewController` if not nil.
         if let previewViewController = previewViewController {
             self.previewViewController = previewViewController     
         }
      }

      /// Screen recoder did change availability
      func screenRecorderDidChangeAvailability(_ screenRecorder: RPScreenRecorder) {
           // e.g update your button UI etc
           // you can use something like delegation to pass something to your SKScenes
     }
}

最后创建一个方法来呈现预览。最好通过游戏结束菜单中的按钮调用它。

func showPreview() {
    guard let previewViewController = previewViewController else { return }

    print("Showing screen recording preview")

    // `RPPreviewViewController` only supports full screen modal presentation.
    previewViewController.modalPresentationStyle = .fullScreen

    let rootViewController = UIApplication.shared.keyWindow?.rootViewController
    rootViewController?.present(previewViewController, animated: true, completion:nil)
}

现在您可以在项目中任意位置调用方法

ScreenRecorder.shared.start()
ScreenRecorder.shared.stop()
ScreenRecorder.shared.showPreview() // call stop before calling this

这段代码几乎直接来自 DemoBots。

我认为处理屏幕录制的最佳方式是在主菜单中创建一个自动录制按钮。使用 UserDefaults 保存它的开/关状态。如果它打开了，您在游戏开始时调用 startRecording，并在游戏结束时调用停止录制。如果用户愿意，您可以在游戏结束菜单中显示预览按钮以观看录制。

希望对你有帮助

Answer 2

DemoBots 很难。记得导入 ReplayKit、RPPreviewViewControllerDelegate、RPScreenRecorderDelegate。你能在 GitHub 上发布你的最终代码吗，crashoverride777。这是我写的，无法预览显示：

func startRecording() {
    let sharedRecorder = RPScreenRecorder.shared()

    // Do nothing if screen recording is not available
    guard sharedRecorder.isAvailable else { return }

    // Stop previous recording if necessary
    if sharedRecorder.isRecording {
        stopScreenRecording()
    }

    print("Starting screen recording")

    // Register as the recorder's delegate to handle errors.
    sharedRecorder.delegate = self

    // Start recording
    sharedRecorder.isMicrophoneEnabled = true
    //sharedRecorder.isCameraEnabled = true // fixme


    sharedRecorder.startRecording { error in
        if let error = error as NSError?, error.code != RPRecordingErrorCode.userDeclined.rawValue {
            print(error.localizedDescription)
            // Show alert
            return
        }
    }
}

func stopScreenRecording() {
    let sharedRecorder = RPScreenRecorder.shared()

    // Do nothing if screen recording is not available
    guard sharedRecorder.isAvailable else { return }

    // Stop recording
    sharedRecorder.stopRecording { [unowned self] (previewViewController, error) in
        if let error = error {
            // If an error has occurred, display an alert to the user.
            print(error.localizedDescription)
            // Show alert
            return
        }

        print("Stop screen recording")

        if let previewViewController = previewViewController {
            // Set delegate to handle view controller dismissal.
            previewViewController.previewControllerDelegate = self

            /*
             Keep a reference to the `previewViewController` to
             present when the user presses on preview button.
             */
            self.previewController = previewViewController
        }
    }
}

func previewControllerDidFinish(_ previewController: RPPreviewViewController) {
    view?.window?.rootViewController?.dismiss(animated: true)
}