How to prevent ARKit app to place object if I click on the button (How to detect if I click on UI element)?

Question

How can I prevent ARKit app (initially made in Unity) from placing an object on the surface when I'm clicking on the UI button on the screen?

The solution from this tutorial doesn't work:

if ((touch.phase == TouchPhase.Began || touch.phase == TouchPhase.Moved) && !EventSystem.current.IsPointerOverGameObject(0))

Is there any other way to detect if I'm clicking on the UI element for IOS?

Here is the full code for placing objects using ARKit:

using System;
using System.Collections.Generic;
using UnityEngine.EventSystems;

namespace UnityEngine.XR.iOS
{
    public class UnityARHitTestExample : MonoBehaviour
    {
        public Transform m_HitTransform;


        bool HitTestWithResultType (ARPoint point, ARHitTestResultType resultTypes)
        {
            List<ARHitTestResult> hitResults = UnityARSessionNativeInterface.GetARSessionNativeInterface ().HitTest (point, resultTypes);
            if (hitResults.Count > 0) {
                foreach (var hitResult in hitResults) {
                    Debug.Log ("Got hit!");
                    m_HitTransform.position = UnityARMatrixOps.GetPosition (hitResult.worldTransform);
                    m_HitTransform.rotation = UnityARMatrixOps.GetRotation (hitResult.worldTransform);
                    Debug.Log (string.Format ("x:{0:0.######} y:{1:0.######} z:{2:0.######}", m_HitTransform.position.x, m_HitTransform.position.y, m_HitTransform.position.z));
                    return true;
                }
            }
            return false;
        }

        // Update is called once per frame
        void Update () {
            if (Input.touchCount > 0 && m_HitTransform != null)
            {
                var touch = Input.GetTouch(0);
                if ((touch.phase == TouchPhase.Began || touch.phase == TouchPhase.Moved) && !EventSystem.current.IsPointerOverGameObject(0))
                {
                    transform.localPosition = Vector3.zero;
                    var screenPosition = Camera.main.ScreenToViewportPoint(touch.position);
                    ARPoint point = new ARPoint {
                        x = screenPosition.x,
                        y = screenPosition.y
                    };

                    // prioritize reults types
                    ARHitTestResultType[] resultTypes = {
                        ARHitTestResultType.ARHitTestResultTypeExistingPlaneUsingExtent, 
                        // if you want to use infinite planes use this:
                        //ARHitTestResultType.ARHitTestResultTypeExistingPlane,
                        ARHitTestResultType.ARHitTestResultTypeHorizontalPlane, 
                        ARHitTestResultType.ARHitTestResultTypeFeaturePoint
                    }; 

                    foreach (ARHitTestResultType resultType in resultTypes)
                    {
                        if (HitTestWithResultType (point, resultType))
                        {
                            return;
                        }
                    }
                }

                if (noShoesPlaced) {
                    UIController.GetComponent<ShoeUIController2>().showShoe1
                    noShoesPlaced = false;
                }
            }

            //if (placeFirstTime) {
            //  UIController.GetComponent<ShoeUIController> ().firstTimePlace = true;
            //  placeFirstTime = false;
        //  }

        }


    }
}