unity3d:ugui双击按钮

    public class ClickEventListener : MonoBehaviour, IPointerClickHandler, IPointerDownHandler, IPointerUpHandler
        public static ClickEventListener Get(GameObject obj)
            ClickEventListener listener = obj.GetComponent<ClickEventListener>();
            if (listener == null)
                listener = obj.AddComponent<ClickEventListener>();
            return listener;
        System.Action<GameObject> mClickedHandler = null;
        System.Action<GameObject> mDoubleClickedHandler = null;
        System.Action<GameObject> mOnPointerDownHandler = null;
        System.Action<GameObject> mOnPointerUpHandler = null;
        bool mIsPressed = false;
        public bool IsPressd
            get { return mIsPressed; }
        public void OnPointerClick(PointerEventData eventData)
            if (eventData.clickCount == 2)
                if (mDoubleClickedHandler != null)
                    mDoubleClickedHandler(gameObject);
                if (mClickedHandler != null)
                    mClickedHandler(gameObject);
        public void SetClickEventHandler(System.Action<GameObject> handler)
            mClickedHandler = handler;
        public void SetDoubleClickEventHandler(System.Action<GameObject> handler)
            mDoubleClickedHandler = handler;
        public void SetPointerDownHandler(System.Action<GameObject> handler)
            mOnPointerDownHandler = handler;
        public void SetPointerUpHandler(System.Action<GameObject> handler)
            mOnPointerUpHandler = handler;
        public void OnPointerDown(PointerEventData eventData)
            mIsPressed = true;
            if (mOnPointerDownHandler != null)
                mOnPointerDownHandler(gameObject);
        public void OnPointerUp(PointerEventData eventData)
            mIsPressed = false;
            if (mOnPointerUpHandler != null)