/// <summary>
/// 捡起物品槽中指定数量的物品
/// </summary>
/// <param name="itemUI"></param>
/// <param name="amount"></param>
public void PickedItemUI(Item item, int amount)
{
PickedItem.SetItem(item, amount); //将当前物品信息复制给PickedItem(跟随鼠标移动)
isPickedItem = true; //当前鼠标上有物品了
PickedItem.ShowItemUI(); //显示PickedItem
toolTip.Hide(); //隐藏物品信息框的提示
}