public void Add2InteractionList(InteractionInterface ob)
{
if (ob is InteractionInterface)
{
//add2list
if (interactionList.Count > 0)
{
//last hide
InteractionInterface interaction = interactionList[interactionList.Count - 1];
interaction.HideFoucsArror();
}
//add
interactionList.Add(ob);
//new last show
interactionList[interactionList.Count - 1].ShowFoucsArror();
}
}
public void remove2InteractionList(InteractionInterface ob)
{
if (ob is InteractionInterface)
{
//removeList
if (interactionList.Count > 0)
{
//是否是最后一个
if (interactionList.IndexOf(ob) == (interactionList.Count - 1))
{
ob.HideFoucsArror();
}
interactionList.Remove(ob);
if (interactionList.Count > 0)
{
//倒数第二个显示(现在的倒数第一个)
interactionList[interactionList.Count - 1].ShowFoucsArror();
}
}
}
}