Unity防UI穿透

    public static bool IsPointerOverUI()
    {
        // 优先检测触摸
        for (int i = 0; i < Input.touchCount; i++)
        {
            Touch touch = Input.touches[i];
            if (touch.phase == TouchPhase.Began)
            {
                if (EventSystem.current.IsPointerOverGameObject(touch.fingerId))
                    return true;
            }
        }

        // 检测鼠标
        if (EventSystem.current.IsPointerOverGameObject())
            return true;

        // 备用方案：手动射线检测
        return RaycastUI();
    }

    private static bool RaycastUI()
    {
        PointerEventData eventData = new PointerEventData(EventSystem.current);
        eventData.position = Input.mousePosition;

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

        // 过滤掉透明部分（可选）
        foreach (RaycastResult result in results)
        {
            if (result.gameObject.GetComponent<UnityEngine.UI.Image>()?.raycastTarget ?? false)
                return true;
        }
        return false;
    }