//撤销（只限一步且上步未发生合成）
public void UndoStep()
{
if (UIClickable)
{
if (!grouped)
{
//显示当前格子颜色
Text number;
Text level;
number = GameObject.Find("blank" + curIndex).transform.FindChild("Number").GetComponent <Text> ();
level = GameObject.Find("blank" + curIndex).transform.FindChild("Level").GetComponent <Text> ();
aunts [curIndex].ClearAunts();
Destroy(GameObject.Find("aunt" + curIndex));
Debug.Log(curIndex);
number.text = "";
level.text = "";
mission.ChangeRound(-1);
mission.ChangeAunts(-1);
stepNumber.text = mission.GetRound().ToString();
grouped = true;
UndoButton.SetActive(false);
}
}
}
