Unity_Basic_Framework/Assets/Scripts/ProjectBase/Event/EventCenter.cs

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.Events;
using UnityEngine.Windows;

public interface IEventInfo//利用一个空的接口来承载泛型类,里氏转换原则
{

}
public class EventInfo<T> : IEventInfo
{
    public UnityAction<T> action;
    public EventInfo(UnityAction<T> action)
    {
        action += action;
    }
}

public class EventInfo : IEventInfo
{

    public UnityAction action;
    public EventInfo(UnityAction action)
    {
        this.action += action;
    }
}



/// <summary>
/// 事件中心
/// 1.字典 2.委托 3.观察者设计模式
/// 4.泛型
/// </summary>
public class EventCenter : BaseManager<EventCenter>
{
    //key ---事件名字（比如：怪物死亡，玩家死亡，通关 等等）
    //value --- 对应 监听这个事件 对应的委托函数
    private Dictionary<string , IEventInfo> eventDic = new Dictionary<string , IEventInfo>();

    /// <summary>
    /// 添加事件监听
    /// </summary>
    /// <param name="name">事件的名字</param>
    /// <param name="action">准备用来处理时间的委托函数</param>
    public void AddEventListener<T>(string name,UnityAction<T> action)
    {
        //有没有对应的事件监听
        //有的情况
        if(eventDic.ContainsKey(name))
        {
            (eventDic[name] as EventInfo<T>).action += action;//已经有事件就往后排
        }
        //没有的情况
        else
        {
            eventDic.Add(name, new EventInfo<T>(action));//没有就加一个
        }
    }

    /// <summary>
    /// 重载加入事件,不需要参数,没有泛型
    /// </summary>
    /// <param name="name"></param>
    /// <param name="action"></param>
    public void AddEventListener(string name, UnityAction action)
    {
        //有没有对应的事件监听
        //有的情况
        if (eventDic.ContainsKey(name))
        {
            (eventDic[name] as EventInfo).action += action;//已经有事件就往后排
        }
        //没有的情况
        else
        {
            eventDic.Add(name, new EventInfo(action));//没有就加一个
        }
    }

    /// <summary>
    /// 减去事件监听
    /// 事件有加就有减
    /// </summary>
    /// <param name="name"></param>
    /// <param name="action"></param>
    public void RemoveEventListener<T>(string name, UnityAction<T> action)
    {
        if(eventDic.ContainsKey(name))
        {
            (eventDic[name] as EventInfo<T>).action -= action;
        }
    }

    /// <summary>
    /// 重载事件移除,没有泛型
    /// </summary>
    /// <param name="name"></param>
    /// <param name="action"></param>
    public void RemoveEventListener(string name, UnityAction action)
    {
        if (eventDic.ContainsKey(name))
        {
            (eventDic[name] as EventInfo).action -= action;
        }
    }

    /// <summary>
    /// 事件触发
    /// </summary>
    /// <param name="name">哪一个名字的事件触发了</param>
    public void EventTrigger<T>(string name,T info)
    {
        if(eventDic.ContainsKey(name))
        {
            if((eventDic[name] as EventInfo<T>).action != null)
            {
                (eventDic[name] as EventInfo<T>).action.Invoke(info);
            }
            
          //  eventDic[name].Invoke(info);//有就触发事件
        }
    }

    /// <summary>
    /// 重载事件触发，没有泛型
    /// </summary>
    /// <param name="name"></param>
    /// <param name="info"></param>
    public void EventTrigger(string name)
    {
        if (eventDic.ContainsKey(name))
        {
            if ((eventDic[name] as EventInfo).action != null)
            {
                (eventDic[name] as EventInfo).action.Invoke();
            }

            //  eventDic[name].Invoke(info);//有就触发事件
        }
    }

    /// <summary>
    /// 清空事件中心,主要用在场景切换时  
    /// </summary>
    public void Clear()
    {
        eventDic.Clear();
    }
}