Display a 3D object forever in ARkit - swift

Question

I am trying to recognise an object to displaying 3D model,
and it’s work when I put the camera on the object the 3D model displayed
my problem is 3d model displayed only for around 5 second then it disappear
so how can I display my 3d model forever?
This my code section:
class ViewController: UIViewController, UITextFieldDelegate
{
var proximityObserver: ProximityObserver! // Beacon declaration
#IBOutlet weak var sceneView: ARSCNView!
//#IBOutlet var sceneView: ARSCNView!
let fadeDuration: TimeInterval = 0.3
let rotateDuration: TimeInterval = 3
let waitDuration: TimeInterval = 0.5
lazy var fadeAndSpinAction: SCNAction = {
return .sequence([
.fadeIn(duration: fadeDuration),
.rotateBy(x: 0, y: 0, z: CGFloat.pi * 360 / 180, duration: rotateDuration),
.wait(duration: waitDuration),
.fadeOut(duration: fadeDuration)
])
}()
lazy var fadeAction: SCNAction = {
return .sequence([
.fadeOpacity(by: 0.8, duration: fadeDuration),
.wait(duration: waitDuration),
.fadeOut(duration: fadeDuration)
])
}()
lazy var bookNode: SCNNode = {
guard let scene = SCNScene(named: "art.scnassets/book.scn"),
let node = scene.rootNode.childNode(withName: "book", recursively: true) else { return SCNNode() }
let scaleFactor = 0.1
node.scale = SCNVector3(scaleFactor, scaleFactor, scaleFactor)
return node
}()
override func viewDidLoad() {
super.viewDidLoad()
let estimoteCloudCredentials = CloudCredentials(appID: "reem-badr-s-proximity-for--6o4", appToken: "8be2dff5dc16b9747b7fafe97ff53708")
proximityObserver = ProximityObserver(credentials: estimoteCloudCredentials, onError: { error in
print("ProximityObserver error: \(error)")
})
let zone = ProximityZone(tag: "reem-badr-s-proximity-for--6o4", range: ProximityRange.near)
zone.onEnter = { contexts in
print("enter")
self.sceneView.delegate = self as ARSCNViewDelegate
self.configureLighting()
}
zone.onExit =
{ contexts in
print("Exit")
}
proximityObserver.startObserving([zone])
}
func configureLighting() {
sceneView.autoenablesDefaultLighting = true
sceneView.automaticallyUpdatesLighting = true
}
override func viewWillAppear(_ animated: Bool) {
super.viewWillAppear(animated)
resetTrackingConfiguration()
}
override func viewWillDisappear(_ animated: Bool) {
super.viewWillDisappear(animated)
sceneView.session.pause()
}
#IBAction func resetButtonDidTouch(_ sender: UIBarButtonItem) {
resetTrackingConfiguration()
}
func resetTrackingConfiguration()
{
guard let referenceImages = ARReferenceImage.referenceImages(inGroupNamed: "AR Resources", bundle: nil) else { return }
let configuration = ARWorldTrackingConfiguration()
configuration.detectionImages = referenceImages
sceneView.session.run(configuration)
}
}
func renderer(_ renderer: SCNSceneRenderer, didAdd node: SCNNode, for anchor: ARAnchor)
{
DispatchQueue.main.async {
guard let imageAnchor = anchor as? ARImageAnchor,
let imageName = imageAnchor.referenceImage.name else { return }
let overlayNode = self.getNode(withImageName: imageName)
overlayNode.opacity = 0
overlayNode.position.y = 0.2
overlayNode.runAction(self.fadeAndSpinAction)
node.addChildNode(overlayNode)
}
func getPlaneNode(withReferenceImage image: ARReferenceImage) -> SCNNode {
let plane = SCNPlane(width: image.physicalSize.width,
height: image.physicalSize.height)
let node = SCNNode(geometry: plane)
return node
}
func getNode(withImageName name: String) -> SCNNode
{
var node = SCNNode()
switch name
{
case "Book":
node = bookNode
default:
break
}
return node
}
}
and so on...