/// <summary>
/// 界面入栈
/// </summary>
/// <param name="name"></param>
public void PushUIStack(string uiname)
{
if (UIStack.Count > 0)
{
//返回栈顶的界面，且不移除
IUIBase old_Pop = UIStack.Peek();
//保留之前的界面
old_Pop.OnPausing();
}
//创建界面
IUIBase new_Pop = GetCurrentUI(uiname);
//界面进栈顶部
UIStack.Push(new_Pop);
//进入当前界面
new_Pop.OnEntering();
}