override func touchesBegan(_ touches: Set<UITouch>, with event: UIEvent?) {

        guard let touch = touches.first else { return }

        let touchPoint = touch.location(in: yourARsceneOUTLET)

        let results = yourARsceneOUTLET.hitTest(touchPoint, types: [.featurePoint])

        guard let result = results.last else { return}

        let hitTransform = SCNMatrix4(result.worldTransform)

        let position = SCNVector3Make(hitTransform.m41, hitTransform.m42, hitTransform.m43)

        addModel(position: position) // the function that has the Alert with textField
    }