Allows to check if a pointer is over a UI (works on touch devices too)

IsPointerOverGameObjectUtils.cs

using UnityEngine;
using UnityEngine.EventSystems;

namespace Wikwemot_AR.Modules.Input.Runtime.Scripts
{
    //  See : https://discussions.unity.com/t/ispointerovergameobject-not-working-with-touch-input/155469/3
    public static class IsPointerOverGameObjectUtils
    {
        /// <returns>true if mouse or first touch is over any event system object ( usually gui elements )</returns>
        public static bool IsPointerOverGameObject()
        {
            //check mouse
            if (EventSystem.current.IsPointerOverGameObject())
            {
                Debug.Log("[TOUCHES] Mouse is over a UI element");
                return true;
            }
            
            //check touch
            if (UnityEngine.Input.touchCount <= 0 || UnityEngine.Input.touches[0].phase != TouchPhase.Began)
            {
                Debug.Log("[TOUCHES] No touch detected or touch is not in the Began phase");
                return false;
            }

            if (EventSystem.current.IsPointerOverGameObject(UnityEngine.Input.GetTouch(0).fingerId))
            {
                Debug.Log("[TOUCHES] Touch is over a UI element, there are " + UnityEngine.Input.touchCount + " touches");
                return true;
            }

            return false;
        }
    }
}