didAdd does not seem to be firing for planeDetection

[linusb212]

I'm a very new coder just a few months in so I'm hoping I'm not breaking some protocol here...and also please forgive me if my lingo is bad. I'm just a hobbyist coder.

I'm building an app using this SDK and it's really fantastic. But I'm running into one spot of trouble where the plane detection 'didadd' method does not seem to be firing.

I think I've declared the appropriate protocol and also set the proper delegate. And I've used some other ARSCN delegate methods and they fire off ok - so I think I have everything structured ok.

Is there another way to set the planeDetection property within this SDK somewhere other than through the ARWorldTrackingConfiguration class?

`class ViewController: UIViewController, FetchNodesProtocol, PickedImageProtocol, UIImagePickerControllerDelegate, UINavigationControllerDelegate, ARSCNViewDelegate {

  let configuration = ARWorldTrackingConfiguration()


   @IBAction func buttonActionStart(_ sender: Any) {

    sceneLocationView.run()
    sceneLocationView.autoenablesDefaultLighting = true
    sceneLocationView.debugOptions = [ARSCNDebugOptions.showFeaturePoints, ARSCNDebugOptions.showWorldOrigin]
    
    sceneLocationView.arViewDelegate = self
    configuration.planeDetection = .horizontal
    sceneLocationView.orientToTrueNorth = false
    view.addSubview(sceneLocationView)

    model.fetchNodes(location!.coordinate.latitude, location!.coordinate.longitude)
}

    func renderer(_ renderer: SCNSceneRenderer, didAdd node: SCNNode, for anchor: ARAnchor) {
    
    DispatchQueue.main.async {
        self.labelStatus.text = "Plane Detected"
    }

    DispatchQueue.main.asyncAfter(deadline: .now() + 2) {
        self.labelStatus.text = "scanning for Planes"
    }
}

`