unity 事件订阅，发布，可用于新手引导

主要代码事件订阅，发布

##获取事件对象进行操作

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

public class EventBase{
	private List<Action> actions = new List<Action>();

	/// <summary>
	/// 发布事件
	/// </summary>
	public void Publish ()
	{
		if (actions != null) {
			foreach (Action action in actions) {
				action();
			}
		}
	}

	/// <summary>
	/// 订阅事件
	/// </summary>
	/// <param name="t">T.</param>
	public void Subscribe (Action t)
	{	
		if (!actions.Contains (t)) {
			actions.Add (t);
		}
	}

	/// <summary>
	/// 取消事件
	/// </summary>
	/// <param name="t">T.</param>
	public void UnSubscribe (Action t)
	{
		if (actions.Contains (t)) {
			actions.Remove (t);
		}
	}

	public void Clear()
	{
		actions.Clear ();
	}
	
}


public class EventBase<T>: EventBase{
	private List<Action<T>> actions ;

	public void Publish (T t)
	{
		if (actions != null) {
			foreach (Action<T> action in actions) {
				action(t);
			}
		}
	}

	public void Subscribe (Action<T> action)
	{	
		if (actions == null) {
			actions = new List<Action<T>>();
		}
		if (!actions.Contains (action)) {
			actions.Add (action);
		}
	}

	public void UnSubscribe (Action<T> action)
	{
		if (actions == null) {
			return;
		}
		if (actions.Contains (action)) {
			actions.Remove (action);
		}
	}
	
}



public class  EventServer{
	private static EventServer instance = new EventServer();

	//存放事件对象集合
	private Dictionary<Type,EventBase>  evenbasci = new Dictionary<Type, EventBase>();

	public static EventServer Instance {
		get{ 
			return instance;
		}
	}

	/// <summary>
	/// 获取事件对象，并对该对象进行订阅和发布
	/// </summary>
	/// <returns>The event.</returns>
	/// <typeparam name="T">The 1st type parameter.</typeparam>
	public T GetEvent<T> () where T: EventBase
	{
		Type eventtype = typeof(T);
		if (!evenbasci.ContainsKey (eventtype)) {
			//如果事件对象不存在,创建该事件对象
			T e = Activator.CreateInstance <T>();
			evenbasci.Add (eventtype,e);
		}
		return (T)evenbasci[eventtype];
	}

	public void ClearAll ()
	{
		foreach (EventBase e in evenbasci.Values) {
			e.Clear ();
		}

		evenbasci.Clear ();
	}
}

示例事件

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using UnityEngine;
using System.Collections;

public class GuideTutor : EventBase {
}

用法

  • 在一定的地方订阅示例事件

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    void Start () {
    	EventServer.Instance.GetEvent<GuideTutor> ().Subscribe (EventLog);
    }

    void EventLog()
    {
    	Debug.Log ("时间订阅");
    }

  • 在需要的地方发布事件

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    EventServer.Instance.GetEvent<GuideTutor> ().Publish ();