public void SwitchState(string s)
{
IState tmpState = this.GetState(s);
if (tmpState == null)
{
Debug.LogWarningFormat("FSMSystem(容错)：该状态【{0}】不存在于状态机中！", s);
}
if (this.curState != null)
{
curState.onExit();
}
this.curState = tmpState;
tmpState.onEnter();
}