无法理解我的 spritekit 游戏中的延迟？

Question

制作一个简单的 spritekit 游戏。在那里，我听到了AVFoundation 声音库所做的按钮触摸声音等声音。但是有这个麻烦。按下任何按钮时，我的帧速率总是下降，这听起来。但是，如果我将所有声音都静音，则没有延迟。这是我的代码：

import AVFoundation

class GameAudio {
    static let shared = GameAudio()

    private var buttonClickSound = AVAudioPlayer()
    private var completionSound = AVAudioPlayer()
    private var swishSound = AVAudioPlayer()
    private var gridSwishSound = AVAudioPlayer()
    private let Volume: Float = 0.8

    func setupSounds() {
        print("GameAudio setupSounds()")
        if let path = Bundle.main.path(forResource: SoundNames.ButtonClickSoundName, ofType: "mp3") {
            let url = URL(fileURLWithPath: path )
            do {
                buttonClickSound = try AVAudioPlayer(contentsOf: url)
            } catch {
                print(error)
            }
        }
        if let path = Bundle.main.path(forResource: SoundNames.CompletionSoundName, ofType: "mp3") {
            let url = URL(fileURLWithPath: path)
            do {
                completionSound = try AVAudioPlayer(contentsOf: url)
            } catch {
                print(error)
            }
        }
        if let path = Bundle.main.path(forResource: SoundNames.SwishSoundName, ofType: "mp3") {
            let url = URL(fileURLWithPath: path )
            do {
                swishSound = try AVAudioPlayer(contentsOf: url)
            } catch {
                print(error)
            }
        }
        if let path = Bundle.main.path(forResource: SoundNames.GridSwishSoundName, ofType: "mp3") {
            let url = URL(fileURLWithPath: path)
            do {
                gridSwishSound = try AVAudioPlayer(contentsOf: url)
            } catch {
                print(error)
            }
        }
        buttonClickSound.volume = Volume
        completionSound.volume = Volume
        swishSound.volume = Volume
        gridSwishSound.volume = Volume
    }

    func playButtonClickSound() {
        buttonClickSound.play()
    }

    func playCompletionSound() {
        completionSound.play()
    }

    func playSwishSound() {
        swishSound.play()
    }

    func playGridSwishSound() {
        gridSwishSound.play()
    }
}

在我的 GameViewController 中，我调用 GameAudio.shared.setupSounds() 来预加载我所有的声音。

public struct Actions {
    static func buttonIsTouched(_ button: SKNode, sound: Bool, completion: @escaping () -> ()) {
        if button.hasActions() { return }
        if sound {
            GameAudio.shared.playButtonClickSound()
        }
        button.run(touchedButtonAction(scaleFactor: button.returnScaleFactor()), completion: completion)
    }
}

class MenuNode: SKNode {
    private let settings: Settings

    var delegate: MenuNodeDelegate?

    private let playButton = SKSpriteNode(imageNamed: SpriteNames.PlayButtonName)

    private let MenuNodeTreshold: CGFloat = 12.0

    init(settings: Settings) {
        self.settings = settings
        super.init()

        setupButtons()

        isUserInteractionEnabled = false
    }

    private func setupButtons() {
        playButton.position = CGPoint(x: 0.0 - playButton.frame.size.width / 2.0 - MenuNodeTreshold / 2.0, y: 0.0)
        addChild(playButton)
    }

    override func touchesEnded(_ touches: Set<UITouch>, with event: UIEvent?) {
        for touch in touches {
            let location = touch.location(in: self)

            if playButton.contains(location) {
                Actions.buttonIsTouched(playButton as SKNode, sound: settings.sound, completion: {
                    self.delegate?.playButtonTouched()
                })
            }
        }
    }

    required init?(coder aDecoder: NSCoder) {
        fatalError("init(coder:) has not been implemented")
    }
}

我在游戏中的所有操作都使用Actions 结构。我有buttonTouchedAction()，我在不同的节点上使用它。我用一个“播放”按钮从我的菜单中添加了一些代码。因此，例如，我在设备上运行我的游戏，它显示菜单节点，等待几秒钟然后点击按钮，在我的帧速率下降之后，我有一秒钟的延迟，然后场景切换到游戏场景。

Answer 1

我也有类似的问题。我最终使用SKAction 播放短音。

SKAction.playSoundFileNamed("Sounds/Click.wav", waitForCompletion: false)

详情请见SKAction reference。

Answer 2

如果你想使用AVAudioPlayer（而不是SpriteKit's声音动作），你应该让声音在后台线程中播放，这样它的操作就不会干扰你所有视觉内容所在的主线程：

 let soundQueue = OperationQueue()
 soundQueue.qualityOfService = QualityOfService.background 
 soundQueue.addOperation{self.buttonClickSound.play()}