private void EnterBillboard(Transform billboard)
{
// Debug.Log ("进入公告牌");
Billboard bb = billboard.GetComponent <Billboard> ();
expUICtr.SetUpBillboard(bb);
}
/// <summary>
/// 显示billboard
/// </summary>
/// <param name="bb">Bb.</param>
public void ShowBillboard(Billboard bb)
{
MapWalkableEventsStopAction();
expUICtr.SetUpBillboard(bb);
}