UGUI_GraphicRaycaster检测鼠标位置的所有UI

void InspectUI()

    {        

        List<RaycastResult> list = new List<RaycastResult>();

//场景中的EventSystem

        PointerEventData eventData = new PointerEventData(EventSystem.current);

//鼠标位置

        eventData.pressPosition = Input.mousePosition;

        eventData.position = Input.mousePosition;

//Canvas的GraphicRaycaster组件，只能获取当前GraphicRaycaster下的所有UI

//并且子级中的UI组件RaycastTarget设置为true

        GraphicRaycaster graphicRaycaster = GameCtrl.instance.transform.GetComponent<GraphicRaycaster>();

//获取Canvas下的所有UI反馈

        graphicRaycaster.Raycast(eventData, list);

        foreach(RaycastResult rr in list ) {

Debug.Log( rr.gameObject.name );

}

    }