XCode ARKit 图像跟踪 - 不在视图中时暂停视频

如何解决XCode ARKit 图像跟踪 - 不在视图中时暂停视频

您好，我是开发新手，现在我正在开发一个 AR 应用程序，它可以与图像跟踪一起使用，它应该在不同的跟踪图像上播放不同的视频。如果图像不在摄像机视图中，视频仍会继续。是否也有暂停功能，以便在再次跟踪图像时重新开始视频？我找到了这个，但它不起作用。 （也许我在错误的行中实现了它，但我没有弄清楚在哪里）

func renderer(_ renderer: SCNSceneRenderer,didUpdate node: SCNNode,for anchor: aranchor) {guard let imageAnchor = (anchor as? ARImageAnchor) else { return }if imageAnchor.isTracked {
   videoNode.play()
} else {
   videoNode.pause()
}
}

我的代码现在看起来像这样。我试着把它放在“node.addChildNode(planeNode)”之后

import UIKit
import SceneKit
import ARKit

class ViewController: UIViewController,ARSCNViewDelegate {

    @IBOutlet var sceneView: ARSCNView!
    
    override func viewDidLoad() {
        super.viewDidLoad()
        sceneView.delegate = self
    }
    
    override func viewWillAppear(_ animated: Bool) {
        super.viewWillAppear(animated)
        
        let configuration = ARImageTrackingConfiguration()
        
        if let trackedImages = ARReferenceImage.referenceImages(inGroupNamed: "AR Resources",bundle: Bundle.main) {
            configuration.trackingImages = trackedImages
            configuration.maximumNumberOfTrackedImages = 2
        }
        
        sceneView.session.run(configuration)
    }
    
    override func viewWilldisappear(_ animated: Bool) {
        super.viewWilldisappear(animated)
        sceneView.session.pause()
    }

    func renderer(_ renderer: SCNSceneRenderer,nodeFor anchor: aranchor) -> SCNNode? {
        
        let node = SCNNode()
        
        if let imageAnchor = anchor as? ARImageAnchor {
            
            let size = imageAnchor.referenceImage.physicalSize
            
            var videoNode = SKVideoNode()
            
            switch imageAnchor.name {
            case "Image1":
                videoNode = SKVideoNode(fileNamed: "Image1.mp4")
            case "Image2":
                videoNode = SKVideoNode(fileNamed: "Image2.mp4")
            case "Image3":
                videoNode = SKVideoNode(fileNamed: "Image3.mp4")
            default:
                break
            }
            
            videoNode.play()
                
                
            let videoScene = SKScene(size: CGSize(width: 1280,height: 960))
            videoScene.anchorPoint = CGPoint(x: 0.5,y: 0.5)
            videoScene.addChild(videoNode)
            
            let plane = SCNPlane(width: size.width,height: size.height)
            plane.firstMaterial?.diffuse.contents = videoScene
            let planeNode = SCNNode(geometry: plane)
            plane.firstMaterial?.isDoubleSided = true
            planeNode.eulerAngles.x = .pi / 2
            
            node.addChildNode(planeNode)
            
            return node
        }
        
        return nil
    }
}

如果有人能帮忙就好了。我也尝试初始化 AVPlayer 以进行循环，但显然我也做错了。我会感谢每一个提示。 :)