TweenAlpha tweenAlpha = TweenAlpha.Begin (carBase.gameObject, 0.2f, 0f);
tweenAlpha.from = 1f;
tweenAlpha.method = UITweener.Method.EaseInOut;
EventDelegate.Set(tweenAlpha.onFinished, ImDone); // Will fire once then remove it's self from the EventDelegate
public void ImDone()
{
//Do whatever you want here
}