unity中的UI状态机，用于各界面之间的切换和跳转

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<string, string> transitionMap = new Dictionary<string, string>();public virtual void Init(FiniteStateMachine belongToFSM){StateName = GetType().Name;BelongToFSM = belongToFSM;BelongToFSM.Register(StateName, this);foreach (KeyValuePair<string, string> pair in transitionMap){BelongToFSM.State(StateName).On(pair.Key).Enter(pair.Value);}}public virtual void OnEnter(string prevState){
#if UNITY_EDITORDebug.LogWarning("[" + BelongToFSM.Name + "] On Enter State: " + StateName + ", previous state is: " + prevState + transitionMap.Count);
#endif}public virtual void OnExit(string nextState){
#if UNITY_EDITORDebug.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;/// <summary>
/// 状态机管理器
/// </summary>
public class StateMachineManager : CSingleton<StateMachineManager>
{//protected StateMachineManager() { }protected Dictionary<string, FiniteStateMachine> m_FiniteStateMachineDic = new Dictionary<string, FiniteStateMachine>();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<string, FiniteStateMachine> 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<CommonManager>
{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