主要问题:

之后，我将添加此部分以澄清问题。 -我可以暂停我的视频(我不想让它循环播放)。当我的节点出现时，即使它处于暂停状态，我的节点也会播放我的视频。如果我的视频播放完毕，并且可以看到，它将重新开始。我想删除此行为。

在我的应用程序中，我使用SKVideoNode对象和AVPlayer(:URL)对象从3D空间内的SCNNode创建了SCNGeometry。我使用ARKit .ImageTracking来确定何时找到特定图像，然后从那里播放视频。一切都是美好而花花公子的，只是每次AVPlayer出现时，玩家决定自己玩。但是，只要附有ARImageAnchor的SCNNode都可以看到。无论哪种方式，每次节点进入摄像机镜头时，AVPlayer都会播放。我用

override func observeValue(forKeyPath keyPath: String?, of object: Any?, change: [NSKeyValueChangeKey : Any]?, context: UnsafeMutableRawPointer?) {
    if(keyPath == "rate") {
        print((object as! AVPlayer).rate)
    }
}

let tap = UITapGestureRecognizer(target: self, action: #selector(self!.tapGesture))
tap.delegate = self!
tap.name = "MyTap"
self!.sceneView.addGestureRecognizer(tap)

@objc func tapGesture(_ gesture:UITapGestureRecognizer) {
    let tappedNodes = self.sceneView.hitTest(gesture.location(in: gesture.view), options: [SCNHitTestOption.searchMode: 1])

    if !tappedNodes.isEmpty {
        for nodes in tappedNodes {
            if nodes.node == videoPlayer3D {
                videoPlayer3D.tappedVideoPlayer = true
                videoPlayer3D.playOrPause()
                break
            }
        }
    }
}

override func observeValue(forKeyPath keyPath: String?, of object: Any?, change: [NSKeyValueChangeKey : Any]?, context: UnsafeMutableRawPointer?) {
    if(keyPath == "rate") {
        print((object as! AVPlayer).rate)
        if(!self.tappedVideoPlayer) {
            self.player.pause() //HERE
        }
    }
}

func renderer(_ renderer: SCNSceneRenderer, didAdd node: SCNNode, for anchor: ARAnchor) {

    guard let imageAnchor = anchor as? ARImageAnchor else { return }

    createVideoNode(imageAnchor)

}

func createVideoNode(_ anchor:ARImageAnchor, initialPOV:SCNNode) -> My3DPlayer? {

    guard let currentFrame = self.sceneView.session.currentFrame else {
        return nil
    }

    let delegate = UIApplication.shared.delegate as! AppDelegate

    var videoPlayer:My3DPlayer!
    videoPlayer = delegate.testing ? My3DPlayer(data: nil, currentFrame: currentFrame, anchor: anchor) : My3DPlayer(data: self.urlData, currentFrame: currentFrame, anchor: anchor)

    //Create TapGesture
    let tap = UITapGestureRecognizer(target: self, action: #selector(self.tapGesture))
    tap.delegate = self
    tap.name = "MyTap"
    self.sceneView.addGestureRecognizer(tap)

    return videoPlayer
}

class My3DPlayer: SCNNode {

    init(geometry: SCNGeometry?) {
        super.init()
        self.geometry = geometry
    }

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

    convenience init(data:Data?, currentFrame:ARFrame, anchor:ARImageAnchor) {
        self.init(geometry: nil)
        self.createPlayer(currentFrame, data, anchor)
    }

    private func createPlayer(_ frame:ARFrame, _ data:Data?,_ anchor:ARImageAnchor) {

        let physicalSize = anchor.referenceImage.physicalSize

        print("Init Player W/ physicalSize: \(physicalSize)")

        //Create video
        if((UIApplication.shared.delegate! as! AppDelegate).testing) {
            let path = Bundle.main.path(forResource: "Bear", ofType: "mov")
            self.url = URL(fileURLWithPath: path!)
        }
        else {
            let url = data!.getAVAssetURL(location: "MyLocation")
            self.url = url
        }
        let asset = AVAsset(url: self.url)
        let track = asset.tracks(withMediaType: AVMediaType.video).first!
        let playerItem = AVPlayerItem(asset: asset)
        let player = AVPlayer(playerItem: playerItem)
        self.player = player
        var videoSize = track.naturalSize.applying(track.preferredTransform)

        videoSize = CGSize(width: abs(videoSize.width), height: abs(videoSize.height))
        print("Init Video W/ size: \(videoSize)")

        //Determine if landscape or portrait
        self.landscape = videoSize.width > videoSize.height
        print(self.landscape == true ? "Landscape" : "Portrait")

        //Do something when video ended
        NotificationCenter.default.addObserver(self, selector: #selector(playerDidFinishPlaying(note:)), name: NSNotification.Name.AVPlayerItemDidPlayToEndTime, object: nil)

        //Add observer to determine when Player is ready
        player.addObserver(self, forKeyPath: "status", options: [], context: nil)

        //Create video Node
        let videoNode = SKVideoNode(avPlayer: player)

        //Create 2d scene to put 2d player on - SKScene
        videoNode.position = CGPoint(x: videoSize.width/2, y: videoSize.height/2)
        videoNode.size = videoSize


        //Portrait -- //Landscape doesn't need adjustments??
        if(!self.landscape) {
            let width = videoNode.size.width
            videoNode.size.width = videoNode.size.height
            videoNode.size.height = width
            videoNode.position = CGPoint(x: videoNode.size.width/2, y: videoNode.size.height/2)
        }

        let scene = SKScene(size: videoNode.size)

        //Add videoNode to scene
        scene.addChild(videoNode)

        //Create Button-look even though we don't use the button. Just creates the illusion to pressing play and pause
        let image = UIImage(named: "PlayButton")!
        let texture = SKTexture(image: image)
        self.button = SKSpriteNode(texture: texture)
        self.button.position = videoNode.position

        //Makes the button look like a square
        let minimumSize = [videoSize.width, videoSize.height].min()!
        self.button.size = CGSize(width: minimumSize/4, height: minimumSize/4)
        scene.addChild(button)

        //Get ratio difference from physicalsize and video size
        let widthRatio = Float(physicalSize.width)/Float(videoSize.width)
        let heightRatio = Float(physicalSize.height)/Float(videoSize.height)

        let finalRatio = [widthRatio, heightRatio].min()!

        //Create a Plane (SCNPlane) to put the SKScene on
        let plane = SCNPlane(width: scene.size.width, height: scene.size.height)
        plane.firstMaterial?.diffuse.contents = scene
        plane.firstMaterial?.isDoubleSided = true

        //Set Self.geometry = plane
        self.geometry = plane

        //Size the node correctly
        //Find the real scaling variable
        let scale = CGFloat(finalRatio)
        let appearanceAction = SCNAction.scale(to: scale, duration: 0.4)
        appearanceAction.timingMode = .easeOut

        //Set initial scale to 0 then use action to scale up
        self.scale = SCNVector3Make(0, 0, 0)
        self.runAction(appearanceAction)
    }

    @objc func playerDidFinishPlaying(note: Notification) {
        self.player.seek(to: .zero, toleranceBefore: .zero, toleranceAfter: .zero)
        self.player.seek(to: .zero, toleranceBefore: .zero, toleranceAfter: .zero)
        self.setButtonAlpha(alpha: 1)
    }
}

func renderer(_ renderer: SCNSceneRenderer, didAdd node: SCNNode, for anchor: ARAnchor) {

    guard let imageAnchor = anchor as? ARImageAnchor else { return }

    createVideoNode(imageAnchor)
    self.resetConfiguration(turnOnConfig: true, turnOnImageTracking: false)   
}

func resetConfiguration(turnOnConfig: Bool = true, turnOnImageTracking:Bool = false) {
    let configuration = ARWorldTrackingConfiguration()
    if(turnOnImageTracking) {
        guard let referenceImages = ARReferenceImage.referenceImages(inGroupNamed: "AR Resources", bundle: nil) else {
            fatalError("Missing expected asset catalog resources.")
        }
        configuration.planeDetection = .horizontal
        configuration.detectionImages = referenceImages
    }
    else {
        configuration.planeDetection = []
    }
    if(turnOnConfig) {
        sceneView.session.run(configuration, options: [.resetTracking])
    }
}

func renderer(_ renderer: SCNSceneRenderer, didAdd node: SCNNode, for anchor: ARAnchor) {

    guard let imageAnchor = anchor as? ARImageAnchor else { return }

    createVideoNode(imageAnchor)
    self.pauseTracking()  
}

func pauseTracking() {
    self.sceneView.session.pause()
}

最佳答案

好。所以这里是一个解决方法。参见renderer(_:updateAtTime:)。

var player: AVPlayer!
var play = true

@objc func tap(_ recognizer: UITapGestureRecognizer){
    if play{
        play = false
        player.pause()
    }else{
        play = true
        player.play()
    }
}

func setVideo() -> SKScene{
    let size = CGSize(width: 500, height: 500)
    let skScene = SKScene(size: size)

    let videoURL = Bundle.main.url(forResource: "video.mp4", withExtension: nil)!
    player = AVPlayer(url: videoURL)

    skScene.scaleMode = .aspectFit

    videoSpriteNode = SKVideoNode(avPlayer: player)
    videoSpriteNode.position = CGPoint(x: size.width/2, y: size.height/2)
    videoSpriteNode.size = size
    videoSpriteNode.yScale = -1
    skScene.addChild(videoSpriteNode)

    player.play()

    return skScene
}

func renderer(_ renderer: SCNSceneRenderer, didAdd node: SCNNode, for anchor: ARAnchor) {
    if let image = anchor as? ARImageAnchor{
        print("found")

        let planeGeometry = SCNPlane(width: image.referenceImage.physicalSize.width, height: image.referenceImage.physicalSize.height)
        let plane = SCNNode(geometry: planeGeometry)
        planeGeometry.materials.first?.diffuse.contents = setVideo()

        plane.transform = SCNMatrix4MakeRotation(-.pi/2, 1, 0, 0)

        node.addChildNode(plane)
    }
}

func renderer(_ renderer: SCNSceneRenderer, updateAtTime time: TimeInterval) {
    if !play{
        player.pause()
    }
}

关于swift - ARKit SKVideoNode在渲染上播放，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/53256602/