当我返回到包含 ARSCNView 的 viewcontroller 时，相机冻结。如何在没有 ARSCNView 停止工作的情况下在这个视图控制器中来来去去？

Question

我如何初始化 ARSCNView

var sceneView: ARSCNView?

override func viewDidLoad() {
    super.viewDidLoad()
    if ARConfiguration.isSupported{
        sceneView = ARSCNView(frame: CGRect(x: 0, y: 0, width: UIScreen.main.bounds.size.width, height: UIScreen.main.bounds.size.height))

        view.addSubview(sceneView!)

        sceneView!.delegate = self
        // Show statistics such as fps and timing information
        sceneView!.showsStatistics = false

        // Create a new scene
        let scene = SCNScene(named: "totens.scnassets/Main.scn")!
        // Set the scene to the view
        sceneView!.scene = scene
     }
  }

override func viewWillAppear(_ animated: Bool) {
    super.viewWillAppear(animated)

        guard let referenceImages = ARReferenceImage.referenceImages(inGroupNamed: "TotensImages", bundle: nil) else { return }

        let configuration = ARImageTrackingConfiguration()
        configuration.trackingImages = referenceImages
        let options: ARSession.RunOptions = [.removeExistingAnchors]

        sceneView!.session.run(configuration, options: options)
 }

当关闭此视图控制器并尝试重新启动会话时，相机停止出现。有人知道如何帮助我吗？谢谢

Answer 1

好的，这不是修复它的最佳方法，但它可能会起作用。

在您拥有 ARScene 视图的 ViewController 上，您必须初始化一个 bool 标志，该标志将检查您是否必须运行配置。所以..

var shouldDoThingsInViewWillAppear: Bool = true
    override func viewWillAppear(_ animated: Bool) {
    super.viewWillAppear(animated)
if shouldDoThingsInViewWillAppear {
shouldDoThingsInViewWillAppear = false
        guard let referenceImages = ARReferenceImage.referenceImages(inGroupNamed: "TotensImages", bundle: nil) else { return }

        let configuration = ARImageTrackingConfiguration()
        configuration.trackingImages = referenceImages
        let options: ARSession.RunOptions = [.removeExistingAnchors]

        sceneView!.session.run(configuration, options: options)
    }

 }

如果这项工作意味着您不应该运行两次会话或者您不应该添加两次跟踪图像。

如果不尝试对 viewDidAppear 执行相同的操作而不是 ViewWillAppear。

如果下地狱尝试将运行方法更改为

sceneView.session.run(configuration, options: [.resetTracking, .removeExistingAnchors])

当我返回到包含 ARSCNView 的 viewcontroller 时，相机冻结。如何在没有 ARSCNView 停止工作的情况下在这个视图控制器中来来去去？

Camera freezes when I come back to viewcontroller containing ARSCNView. How to come and go in this view controller without ARSCNView stop working?

ios

swift

arkit

arscnview