2020-04-08 Unity是否点击在UI层

    public static bool IsPointerOverUIObject()
    {
        PointerEventData eventDataCurrentPosition = new PointerEventData(EventSystem.current);
#if !UNITY_EDITOR && (UNITY_ANDROID || UNITY_IPHONE)
        eventDataCurrentPosition.position = Input.GetTouch(0).position;
#else
        eventDataCurrentPosition.position = new Vector2(Input.mousePosition.x, Input.mousePosition.y);
#endif

        List<RaycastResult> results = new List<RaycastResult>();
        if (EventSystem.current)
        {
            EventSystem.current.RaycastAll(eventDataCurrentPosition, results);
        }

        for (int i = 0; i < results.Count; i++)
        {
            if (results[i].gameObject.layer == LayerMask.NameToLayer("UI"))
                return true;
        }

        return false;
    }