FSM 代码

using UnityEngine;
using System.Collections;
using System.Collections.Generic;

public delegate void MyDelegate();
public class FSM<T>
{
//用于存储所有实现状态的方法；
private Dictionary<T, MyDelegate> mAllStatesArr;
//当前状态，对应mAllStatesArr的下标；
public T mCurrentStates;

public FSM(T defaultState)
{
    //初始化
    mAllStatesArr = new Dictionary<T, MyDelegate>();
    mCurrentStates = defaultState;
}

//添加状态
public void _FSMAddListener(T state, MyDelegate doing)
{
    //判断空和去重
    if (doing != null && !mAllStatesArr.ContainsKey(state))
        mAllStatesArr.Add(state, doing);
}

private MyDelegate mThisState;
//每帧更新
public void Update()
{
    //执行状态
    //检测是否存在此状态
    if (mAllStatesArr.ContainsKey(mCurrentStates))
    {
        mThisState = mAllStatesArr[mCurrentStates];
        //检测回调是否为空
        if (mThisState != null)
            mThisState();
    }

}

}

使用 代码

using UnityEngine;
using System.Collections;

public class Cube : MonoBehaviour
{
public enum mStates
{
Idle = 0,
Move
}

private FSM<mStates> mFsm;
private MeshRenderer mCubeMesh;
private float mTime;
private float mContinueTime;
private float mMoveSpeed;

void Awake()
{
    mFsm = new FSM<mStates>(mStates.Idle);
    mFsm._FSMAddListener(mStates.Idle, _IdleAndChangeColors);
    mFsm._FSMAddListener(mStates.Move, _MoveAndChangeColors);

    mCubeMesh = this.GetComponent<MeshRenderer>();

}

void Start()
{
    mTime = 0;
    mContinueTime = 0.05f;
    mMoveSpeed = 5;
}

void Update()
{
    mFsm.Update();
}

private void _IdleAndChangeColors()
{
    if (mTime < mContinueTime)
        mCubeMesh.material.color = new Color(1, 1, 0, 1);
    else
    {
        mCubeMesh.material.color = new Color(1, 0.5f, 0, 1);
        if (mTime > mContinueTime * 2)
            mTime = 0;
    }
    mTime += Time.deltaTime;

    if (Input.GetAxis("Horizontal") != 0 || Input.GetAxis("Vertical") != 0)
    {
        mFsm.mCurrentStates = mStates.Move;
        mTime = 0;
    }
}

private void _MoveAndChangeColors()
{
    if (Input.GetKey(KeyCode.W))
        this.transform.Translate(Vector3.forward * mMoveSpeed * Time.deltaTime, Space.World);
    if (Input.GetKey(KeyCode.S))
        this.transform.Translate(Vector3.back * mMoveSpeed * Time.deltaTime, Space.World);
    if (Input.GetKey(KeyCode.A))
        this.transform.Translate(Vector3.left * mMoveSpeed * Time.deltaTime, Space.World);
    if (Input.GetKey(KeyCode.D))
        this.transform.Translate(Vector3.right * mMoveSpeed * Time.deltaTime, Space.World);

    if (mTime < mContinueTime)
        mCubeMesh.material.color = new Color(0, 0, 1, 1);
    else
    {
        mCubeMesh.material.color = new Color(0, 0.5f, 1, 1);
        if (mTime > mContinueTime * 2)
            mTime = 0;
    }
    mTime += Time.deltaTime;

    if (Input.GetAxis("Horizontal") == 0 && Input.GetAxis("Vertical") == 0)
    {
        mFsm.mCurrentStates = mStates.Idle;
        mTime = 0;
    }
}

}