/// <summary> 播放特效 </summary>
public void playEffect(string effectPath, Vector2 pos)
{
GameObject effect = UILoader.LoadUIEffect(effectPath);
Transform UILayer = UILayer_middle;
effect.transform.SetParent(UILayer);
effect.transform.localScale = Vector3.one;
effect.transform.localPosition = new Vector3(pos.x, pos.y, 0);
}