SceneKitTap.swift

//Create TapGesture Recognizer
let tap = UITapGestureRecognizer(target: self, action: #selector(handleTap(rec:)))

//Add recognizer to sceneview
sceneView.addGestureRecognizer(tapRec)

//Method called when tap
@objc func handleTap(rec: UITapGestureRecognizer){
    
       if rec.state == .ended {
            let location: CGPoint = rec.location(in: sceneView)
            let hits = self.sceneView.hitTest(location, options: nil)
            if !hits.isEmpty{
                let tappedNode = hits.first?.node
            }
       }
}