[Unity] Find if a touch is over a UI element

TouchOverUI.cs

static class TouchHelper
{
    // OG version: https://www.reddit.com/r/Unity3D/comments/6o9zsy/comment/dkgxa1i/?utm_source=share&utm_medium=web2x&context=3
    public static bool IsOverUI()
    {
        PointerEventData pointerData = new PointerEventData(EventSystem.current);

        pointerData.position = Input.mousePosition;

        List<RaycastResult> results = new List<RaycastResult>();
        EventSystem.current.RaycastAll(pointerData, results);

        if (results.Count > 0)
        {
            for (int i = 0; i < results.Count; i++)
            {
                if (results[i].gameObject.GetComponent<CanvasRenderer>())
                {
                    return true;
                }
            }
        }

        return false;
    }  

    // Better version, checking over a layer is more optimized than getting a component.
    // Caching the results over allocating new lists every frame is better too.

    static readonly List<RaycastResult> _results = new List<RaycastResult>();
    static readonly PointerEventData _pointerEventData = new PointerEventData(EventSystem.current);
    
    static public bool IsTouchOverUI(int touchId)
    {
        _results.Clear();
        _pointerEventData.position = Input.GetTouch(touchId).position;
        EventSystem.current.RaycastAll(_pointerEventData, _results);

        if (_results.Count > 0)
            for (int i = 0; i < _results.Count; i++)
                if (_results[i].gameObject.layer == 5) // UI layer is always 5
                    return true;

        return false;
    }
}