首先感谢姜雪松先生，大家可以去他的博客查看注释以及代码等，http://jxwgame.blog.51cto.com/943299/1613585 

言归正传：

1.在开发项目的过程中，总是会遇到这样的问题，从一个界面跳转到另外一个界面，每次操作都要对一些对象进行显示与隐藏，操作很麻烦也不方便维护修改。

2.于是很多人在这样的一个基础上开发出了很多便于维护和管理的UI框架或者UI状态机。

3.所以简单说下UI状态机，来管理项目中各个界面之间的切换等

1.UI界面的基类

using System.Collections;using System.Collections.Generic;using UnityEngine;public class StateBehaviour : MonoBehaviour, IState{    public FiniteStateMachine BelongToFSM { get; protected set; }    public string StateName { get; protected set; }    protected Dictionary
     
       transitionMap = new Dictionary
      
       ();    public virtual void Init(FiniteStateMachine belongToFSM)    {        StateName = GetType().Name;        BelongToFSM = belongToFSM;        BelongToFSM.Register(StateName, this);        foreach (KeyValuePair
       
         pair in transitionMap)        {            BelongToFSM.State(StateName).On(pair.Key).Enter(pair.Value);        }    }    public virtual void OnEnter(string prevState)    {#if UNITY_EDITOR        Debug.LogWarning("[" + BelongToFSM.Name + "] On Enter State: " + StateName + ", previous state is: " + prevState + transitionMap.Count);#endif    }    public virtual void OnExit(string nextState)    {#if UNITY_EDITOR        Debug.LogWarning("[" + BelongToFSM.Name + "] On Exit State: " + StateName + ", next state is: " + nextState);#endif    }    public virtual void OnUpdate()    {    }}
       
      
     

2.状态机管理器

using UnityEngine;using System.Collections.Generic;/// 
/// 状态机管理器/// 
public class StateMachineManager : CSingleton
     
      {    //protected StateMachineManager() { }    protected Dictionary
      
        m_FiniteStateMachineDic = new Dictionary
       
        ();    public FiniteStateMachine GetFSM(string name)    {        FiniteStateMachine fsm;        if (!m_FiniteStateMachineDic.TryGetValue(name, out fsm))        {            return null;        }        return fsm;    }    public FiniteStateMachine UiFSM { get; protected set; }    public FiniteStateMachine ControlUiFSM { get; protected set; }    public void Awake()    {        UiFSM = AddFSM("UI FSM");        // 设置第一个状态        UiFSM.EntryPoint(typeof(LoginPanelUI).Name);    }    public void Start()    {        // 设置第一个状态        UiFSM.EntryPoint(typeof(LoginPanelUI).Name);        //ControlUiFSM.EntryPoint(typeof(ConMainPanel).Name);    }    public FiniteStateMachine AddFSM(string name)    {        if (m_FiniteStateMachineDic.ContainsKey(name))        {            return m_FiniteStateMachineDic[name];        }        FiniteStateMachine fsm = new FiniteStateMachine();        fsm.Name = name;        m_FiniteStateMachineDic.Add(fsm.Name, fsm);        return fsm;    }    public bool RemoveFSM(string name)    {        return m_FiniteStateMachineDic.Remove(name);    }    public void Update()    {        foreach (KeyValuePair
        
          pair in m_FiniteStateMachineDic)        {            pair.Value.Update();        }    }    public void OnDestroy()    {        m_FiniteStateMachineDic.Clear();        UiFSM.ClearAllStates();        UiFSM = null;        ControlUiFSM.ClearAllStates();        ControlUiFSM = null;    }}
        
       
      
     

3.登录界面的UI脚本

using System.Collections;using System.Collections.Generic;using UnityEngine;using UnityEngine.UI;public class LoginPanelUI : StateBehaviour{    public Button btn;    protected void Awake()    {        transitionMap["Login"] = typeof(MainPanelUI).Name;        // 注意：该方法必须在transitionMap初始化后调用！        Init(StateMachineManager.Instance.UiFSM);        btn.onClick.AddListener(Onchlic_load);    }    public override void OnEnter(string prevState)    {        base.OnEnter(prevState);        gameObject.SetActive(true);        Debug.Log("OnEnter");    }    public override void OnExit(string nextState)    {        base.OnExit(nextState);        gameObject.SetActive(false);        Debug.Log("OnExit");    }    public override void OnUpdate()    {        base.OnUpdate();        Debug.Log("OnUpdate");    }    public void Onchlic_load()    {        BelongToFSM.Trigger("Login");    }      }

4.主菜单界面的UI脚本

using System.Collections.Generic;using UnityEngine;using UnityEngine.UI;public class MainPanelUI : StateBehaviour{    public Button btn_back;    protected void Awake()    {        transitionMap["GoBack"] = typeof(LoginPanelUI).Name;        // 注意：该方法必须在transitionMap初始化后调用！        Init(StateMachineManager.Instance.UiFSM);        gameObject.SetActive(false);        btn_back.onClick.AddListener(GoBack);    }    public override void OnEnter(string prevState)    {        base.OnEnter(prevState);        gameObject.SetActive(true);    }    public override void OnExit(string nextState)    {        base.OnExit(nextState);        gameObject.SetActive(false);    }    public void GoBack()    {        BelongToFSM.Trigger("GoBack");    }}

5.公共类脚本

using System.Collections.Generic;using UnityEngine;using UnityEngine.VR;public class CommonManager : Singleton
     
      {    protected CommonManager() { }    protected StateMachineManager m_StateMachineManager;    protected void Awake()    {        m_StateMachineManager = StateMachineManager.Instance;        m_StateMachineManager.Awake();    }    protected void Start()    {        m_StateMachineManager.Start();    }    protected void Update()    {        m_StateMachineManager.Update();    }}
     

6.好了，就这么多吧