现在的办法是使用 

public void OnPointerExit (PointerEventData eventData)

{

if (eventData.clickCount > 0 && eventData.eligibleForClick) {

ShowCard (0.5f);

}

}

public void OnPointerClick (PointerEventData eventData)

{

ShowCard (0.5f);

}

请问有更好的办法吗