/// <summary>
/// 清理掉所有如栈的状态
/// </summary>
public void ClearPushedStates()
{
while (stateStack.Count > 0)
{
GameStateBase state = stateStack.Pop();
state.PrepareExit();
var oldStateType = state.StateType;
state.Exit();
// 记录上次的状态
stateChangingContex.RecordLastState(oldStateType);
state.DonePushStack();
state.Dispose();
GameObject.Destroy(state);
}
}
/// <summary>
/// 将oldState压栈但不销毁，新state作为当前的currentState]
/// oldState 执行 preparePushStack等系列函数， currentState执行 prepareEnter系列函数
/// </summary>
public T PushStackState <T>(object userData, bool force) where T : GameStateBase
{
if (force == false)
{
if (currentState != null && typeof(T) == currentState.GetType())
{
return(currentState as T);
}
}
GameStateBase oldState = currentState;
currentState = rootGo.AddComponent <T>();
currentState.MachineManager = this;
currentState.Create(userData);
if (oldState != null)
{
oldState.PreparePushStack();
}
currentState.PrepareEnter();
if (oldState != null)
{
oldState.PushStack();
stateStack.Push(oldState);
}
currentState.Enter();
if (oldState != null)
{
oldState.DonePushStack();
}
currentState.DoneEnter();
return(currentState as T);
}
