Unity3D有限状态机（FSM）学习笔记【3】FSState类

本系列笔记转载自游戏蛮牛专栏作家Jackel的论坛文章，详细介绍了FSM的创建与使用，特与众分享。链接：http://www.manew.com/thread-37136-1-1.html

该类主要是状态的基本操作及事件的添加与触发。代码如下：

using System;using System.Collections;using System.Collections.Generic;public class FSState{protected FiniteStateMachine.EnterState mEnterDelegate;protected FiniteStateMachine.PushState  mPushDelegate;protected FiniteStateMachine.PopStatemPopDelegate;protected IState mStateObject;protected string mStateName;protected FiniteStateMachine mOwner;protected Dictionary<string, FSEvent> mTranslationEvents;public FSState( IState obj, FiniteStateMachine owner, string name, FiniteStateMachine.EnterState e, FiniteStateMachine.PushState pu, FiniteStateMachine.PopState po ){mStateObject = obj;mStateName= name;mOwner= owner;mEnterDelegate= e;mPushDelegate= pu;mPopDelegate= po;mTranslationEvents = new Dictionary<string, FSEvent>();}public IState StateObject{get { return mStateObject; }}public string StateName{get { return mStateName; }}public FSEvent On( string eventName ){FSEvent newEvent = new FSEvent( eventName, null, this, mOwner, mEnterDelegate, mPushDelegate, mPopDelegate );mTranslationEvents.Add( eventName, newEvent );return newEvent;}public void Trigger( string name ){mTranslationEvents[ name ].Execute( null, null, null );}public void Trigger( string eventName, object param1 ){mTranslationEvents[ eventName ].Execute( param1, null, null );}public void Trigger( string eventName, object param1, object param2 ){mTranslationEvents[ eventName ].Execute( param1, param2, null );}public void Trigger( string eventName, object param1, object param2, object param3 ){mTranslationEvents[ eventName ].Execute( param1, param2, param3 );}public FSState On<T>( string eventName, Func<T,bool> action ){FSEvent newEvent = new FSEvent( eventName, null, this, mOwner, mEnterDelegate, mPushDelegate, mPopDelegate );newEvent.mAction = delegate( object o1, object o2, object o3 ){T param1;try { param1 = (T)o1; }catch { param1 = default(T); }action( param1 );return true;};mTranslationEvents.Add( eventName, newEvent );return this;}public FSState On<T>( string eventName, Action<T> action ){FSEvent newEvent = new FSEvent( eventName, null, this, mOwner, mEnterDelegate, mPushDelegate, mPopDelegate );newEvent.mAction = delegate( object o1, object o2, object o3 ){T param1;try{ param1 = (T)o1; }catch{ param1 = default(T); }action( param1 );return true;};mTranslationEvents.Add( eventName, newEvent );return this;}public FSState On<T1,T2>( string eventName, Func<T1,T2,bool> action){FSEvent newEvent = new FSEvent( eventName, null, this, mOwner, mEnterDelegate, mPushDelegate, mPopDelegate );newEvent.mAction = delegate( object o1, object o2, object o3 ){T1 param1;T2 param2;try{ param1 = (T1)o1; } catch { param1 = default(T1); }try{ param2 = (T2)o2; } catch { param2 = default(T2); }action( param1, param2 );return true;};mTranslationEvents.Add( eventName, newEvent );return this;}public FSState On<T1,T2>( string eventName, Action<T1,T2> action ){FSEvent newEvent = new FSEvent( eventName, null, this, mOwner, mEnterDelegate, mPushDelegate, mPopDelegate );newEvent.mAction = delegate( object o1, object o2, object o3 ){T1 param1;T2 param2;try{ param1 = (T1)o1; } catch { param1 = default(T1); }try{ param2 = (T2)o2; } catch { param2 = default(T2); }action( param1, param2 );return true;};mTranslationEvents.Add( eventName, newEvent );return this;}public FSState On<T1,T2,T3>( string eventName, Func<T1,T2,T3,bool> action ){FSEvent newEvent = new FSEvent( eventName, null, this, mOwner, mEnterDelegate, mPushDelegate, mPopDelegate );        newEvent.mAction = delegate (object o1, object o2, object o3) {            T1 param1;            T2 param2;            T3 param3;            try { param1 = (T1)o1; } catch { param1 = default(T1); }            try { param2 = (T2)o2; } catch { param2 = default(T2); }            try { param3 = (T3)o3; } catch { param3 = default(T3); }            action(param1, param2, param3);            return true;    };        mTranslationEvents.Add(eventName, newEvent);        return this;}public FSState On<T1,T2,T3>( string eventName, Action<T1,T2,T3> action ){FSEvent newEvent = new FSEvent( eventName, null, this, mOwner, mEnterDelegate, mPushDelegate, mPopDelegate );        newEvent.mAction = delegate (object o1, object o2, object o3) {            T1 param1;            T2 param2;            T3 param3;            try { param1 = (T1)o1; } catch { param1 = default(T1); }            try { param2 = (T2)o2; } catch { param2 = default(T2); }            try { param3 = (T3)o3; } catch { param3 = default(T3); }            action(param1, param2, param3);            return true;        };        mTranslationEvents.Add(eventName, newEvent);        return this;}}

该类定义了FiniteStateMachine中的三个委托，是一个独立的类，不继承Mono。FiniteStateMachine下一篇讲解

一、委托

1、FiniteStateMachine.EnterState

2、FiniteStateMachine.PushState

3、FiniteStateMachine.PopState

二、事件加入

事件加入有两个重要函数

1、On

public FSEvent On( string eventName ){FSEvent newEvent = new FSEvent( eventName, null, this, mOwner, mEnterDelegate, mPushDelegate, mPopDelegate );mTranslationEvents.Add( eventName, newEvent );return newEvent;}

该方法用于将事件的名字和事件加入到Dictionary中。

2、Trigger

public void Trigger( string name ){mTranslationEvents[ name ].Execute( null, null, null );}

改方法用于从Dictionary中取出事件的触发函数，去执行相应的操作。