16.Unity3D商业游戏源码研究-变身吧主公-战斗-IState，StateMachine

本文固定链接：http://blog.csdn.net/u013108312/article/details/70313116

using UnityEngine;using System.Collections;public interface IState  {    /// <summary>    /// 获取这个状态机的状态    /// </summary>    /// <returns></returns>    uint GetStateID();    /// <summary>    /// 进入这个状态    /// </summary>    /// <param name="machine">状态机</param>    /// <param name="prevState">上一个状态</param>    /// <param name="param1">参数1</param>    /// <param name="param2">参数2</param>    void OnEnter(StateMachine machine, IState prevState, object param1, object param2);    /// <summary>    /// 离开当前这个状态    /// </summary>    /// <param name="nextState">下一个要进入的状态</param>    /// <param name="param1">参数1</param>    /// <param name="param2">参数2</param>    void OnLeave(IState nextState, object param1, object param2);    void OnUpate();    void OnFixedUpdate();    void OnLeteUpdate();}

using UnityEngine;using System.Collections;using System.IO;using System.Collections.Generic;public class StateMachine  {    /// <summary>    /// 所有的状态集合    /// </summary>    private Dictionary<uint, IState> mStateDic = null;    /// <summary>    /// 当前状态    /// </summary>    private IState mCurrentState = null;    /// <summary>    /// 当前状态    /// </summary>    public IState CurrentState    {        get        {            return mCurrentState;        }    }    /// <summary>    /// 当前状态id    /// </summary>    public uint CurrentID    {        get        {            return mCurrentState == null ? 0 : mCurrentState.GetStateID();        }    }    public StateMachine()    {        mStateDic = new Dictionary<uint, IState>();        mCurrentState = null;    }    /// <summary>    /// 注册一个状态    /// </summary>    /// <param name="state">状态对象</param>    /// <returns>成功还是失败</returns>    public bool RegisterState(IState state)    {        if (state == null)        {            Debug.LogError("StateMachine.RegisterState state is Null !");            return false;        }        if (mStateDic.ContainsKey(state.GetStateID()))        {            Debug.LogError("StateMachine.RegisterState mStateDic hava this key key = " + state.GetStateID());            return false;        }        mStateDic.Add(state.GetStateID(), state);        return true;    }    /// <summary>    /// 移除一个状态    /// </summary>    /// <param name="stateId">状态Id</param>    /// <returns>当状态不存在或者状态正在运行那么返回失败</returns>    public bool RemoveState(uint stateId)    {        if (!mStateDic.ContainsKey(stateId))        {            return false;        }        if (mCurrentState != null && mCurrentState.GetStateID() == stateId)        {            return false;        }        mStateDic.Remove(stateId);        return true;    }    /// <summary>    /// 获取一个状态    /// </summary>    /// <param name="stateId">状态id</param>    /// <returns></returns>    public IState GetState(uint stateId)    {        IState stste = null;        mStateDic.TryGetValue(stateId, out stste);        return stste;    }    /// <summary>    /// 停止当前状态    /// </summary>    /// <param name="param1">参数1</param>    /// <param name="param2">参数2</param>    public void StopState(object param1,object param2)    {        if (null == mCurrentState)        {            return;        }        mCurrentState.OnLeave(null, param1, param2);        mCurrentState = null;    }    /// <summary>    /// 切换状态的回调    /// </summary>    public BetweenSwitchState BetweenSwitchStateCallBack = null;    /// <summary>    /// 切换状态回调委托    /// </summary>    /// <param name="from">当前状态</param>    /// <param name="to">要跳转的状态</param>    /// <param name="param1">参数1</param>    /// <param name="param2">参数2</param>    public delegate void BetweenSwitchState(IState from, IState to, object param1, object param2);    /// <summary>    /// 切换状态    /// </summary>    /// <param name="newSatetId">要切换的状态id</param>    /// <param name="param1">参数1</param>    /// <param name="param2">参数2</param>    /// <returns>如果不存在这个状态或者当前状态等于要切换的状态 那么返回失败</returns>    public bool SwitchState(uint newSatetId, object param1, object param2)    {        if (mCurrentState != null && mCurrentState.GetStateID() == newSatetId)        {            return false;        }        IState newState = null;        mStateDic.TryGetValue(newSatetId, out newState);        if (newState == null)        {            return false;        }        if (mCurrentState != null)        {            mCurrentState.OnLeave(newState, param1, param2);        }        IState oldState = mCurrentState;        mCurrentState = newState;        if (BetweenSwitchStateCallBack != null)        {            BetweenSwitchStateCallBack(oldState, mCurrentState, param1, param2);        }        newState.OnEnter(this, oldState, param1, param2);        return true;    }    /// <summary>    /// 判断当前状态是否是摸个状态    /// </summary>    /// <param name="stateId">状态Id</param>    /// <returns>是？不是</returns>    public bool IsInState(uint stateId)    {        return mCurrentState == null ? false : mCurrentState.GetStateID() == stateId;    }    public void OnUpate()    {        if (mCurrentState != null)        {            mCurrentState.OnUpate();        }    }    public void OnFixedUpdate()    {        if (mCurrentState != null)        {            mCurrentState.OnFixedUpdate();        }    }    public void OnLeteUpdate()    {        if (mCurrentState != null)        {            mCurrentState.OnLeteUpdate();        }    }}