protected override void OnClose(bool isShutdown, object userData)
{
base.OnClose(isShutdown, userData);
UnSubscribeAll();
if (eventSubscriber != null)
{
ReferencePool.Release(eventSubscriber);
eventSubscriber = null;
}
HideAllItem();
if (itemLoader != null)
{
ReferencePool.Release(itemLoader);
itemLoader = null;
}
}