学习解耦合DEMO

###第一个脚本

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

public class EventCenter
{

    private static Dictionary<EventType, Delegate> m_EventTable = new Dictionary<EventType, Delegate>();
    //简化
    private static void OnListenerAdding(EventType eventType, Delegate callBack)
    {
        if (!m_EventTable.ContainsKey(eventType))
        {
            m_EventTable.Add(eventType, null);
        }
        Delegate d = m_EventTable[eventType];
        if (d != null && d.GetType() != callBack.GetType())
        {
            throw new Exception(string.Format("尝试为事件{0}添加不同的委托，当前事件所对应的委托是{1},要添加的委托类型为{2}", eventType, d.GetType(), callBack.GetType()));
        }
    }
    private static void OnListenerRemoving(EventType eventType, Delegate callBack)
    {
        if (m_EventTable.ContainsKey(eventType))
        {
            Delegate d = m_EventTable[eventType];
            if (d == null)
            {
                throw new Exception(string.Format("移除监听错误：事件{0}没有对应的委托", eventType));
            }
            else if (d.GetType() != callBack.GetType())
            {
                throw new Exception(string.Format("移除监听错误：尝试为事件{0}移除不同类型的委托，当前委托类型为{1}，要移除的委托类型为{2}", eventType, d.GetType(), callBack.GetType()));
            }
        }
        else
        {
            throw new Exception(string.Format("移除监听错误：没有事件码{0}", eventType));
        }
    }
    private static void OnListenerRemoned(EventType eventType)
    {
        if (m_EventTable[eventType] == null)
        {
            m_EventTable.Remove(eventType);
        }
    }
    #region AddListener
    /// <summary>
    /// 无参数添加监听
    /// </summary>
    /// <param name="eventType"> 事件类型</param>
    /// <param name="callBack"> 回调</param>
    public static void AddListener(EventType eventType, CallBack callBack)
    {
        OnListenerAdding(eventType, callBack);
        m_EventTable[eventType] = (CallBack)m_EventTable[eventType] + callBack;
    }

    /// <summary>
    /// 一个参数添加监听
    /// </summary>
    /// <param name="eventType"> 事件类型</param>
    /// <param name="callBack"> 回调</param>
    public static void AddListener<T>(EventType eventType, CallBack<T> callBack)
    {
        OnListenerAdding(eventType, callBack);
        m_EventTable[eventType] = (CallBack<T>)m_EventTable[eventType] + callBack;
    }
    /// <summary>
    /// 两个参数添加监听
    /// </summary>
    /// <param name="eventType"> 事件类型</param>
    /// <param name="callBack"> 回调</param>
    public static void AddListener<T, X>(EventType eventType, CallBack<T, X> callBack)
    {
        OnListenerAdding(eventType, callBack);
        m_EventTable[eventType] = (CallBack<T, X>)m_EventTable[eventType] + callBack;
    }
    /// <summary>
    /// 三个参数添加监听
    /// </summary>
    /// <param name="eventType"> 事件类型</param>
    /// <param name="callBack"> 回调</param>
    public static void AddListener<T, X, Y>(EventType eventType, CallBack<T, X, Y> callBack)
    {
        OnListenerAdding(eventType, callBack);
        m_EventTable[eventType] = (CallBack<T, X, Y>)m_EventTable[eventType] + callBack;
    }
    /// <summary>
    /// 四个个参数添加监听
    /// </summary>
    /// <param name="eventType"> 事件类型</param>
    /// <param name="callBack"> 回调</param>
    public static void AddListener<T, X, Y, Z>(EventType eventType, CallBack<T, X, Y, Z> callBack)
    {
        OnListenerAdding(eventType, callBack);
        m_EventTable[eventType] = (CallBack<T, X, Y, Z>)m_EventTable[eventType] + callBack;
    }
    /// <summary>
    /// 五个个参数添加监听
    /// </summary>
    /// <param name="eventType"> 事件类型</param>
    /// <param name="callBack"> 回调</param>
    public static void AddListener<T, X, Y, Z, W>(EventType eventType, CallBack<T, X, Y, Z, W> callBack)
    {
        OnListenerAdding(eventType, callBack);
        m_EventTable[eventType] = (CallBack<T, X, Y, Z, W>)m_EventTable[eventType] + callBack;
    }

    #endregion
    #region RemoveListener
    /// <summary>
    /// 移除无参数监听
    /// </summary>
    /// <param name="eventType"></param>
    /// <param name="callBack"></param>
    public static void RemoveAddListener(EventType eventType, CallBack callBack)
    {
        OnListenerRemoving(eventType, callBack);
        m_EventTable[eventType] = (CallBack)m_EventTable[eventType] - callBack;
        OnListenerRemoned(eventType);
    }
    /// <summary>
    /// 移除一个参数监听
    /// </summary>
    /// <param name="eventType"></param>
    /// <param name="callBack"></param>
    public static void RemoveAddListener<T>(EventType eventType, CallBack<T> callBack)
    {
        OnListenerRemoving(eventType, callBack);

        m_EventTable[eventType] = (CallBack<T>)m_EventTable[eventType] - callBack;

        OnListenerRemoned(eventType);
    }
    /// <summary>
    /// 移除俩个参数监听
    /// </summary>
    /// <param name="eventType"></param>
    /// <param name="callBack"></param>
    public static void RemoveAddListener<T, X>(EventType eventType, CallBack<T, X> callBack)
    {
        OnListenerRemoving(eventType, callBack);

        m_EventTable[eventType] = (CallBack<T, X>)m_EventTable[eventType] - callBack;

        OnListenerRemoned(eventType);
    }
    /// <summary>
    /// 移除三个参数监听
    /// </summary>
    /// <param name="eventType"></param>
    /// <param name="callBack"></param>
    public static void RemoveAddListener<T, X, Y>(EventType eventType, CallBack<T, X, Y> callBack)
    {
        OnListenerRemoving(eventType, callBack);

        m_EventTable[eventType] = (CallBack<T, X, Y>)m_EventTable[eventType] - callBack;

        OnListenerRemoned(eventType);
    }
    /// <summary>
    /// 移除四个参数监听
    /// </summary>
    /// <param name="eventType"></param>
    /// <param name="callBack"></param>
    public static void RemoveAddListener<T, X, Y, Z>(EventType eventType, CallBack<T, X, Y, Z> callBack)
    {
        OnListenerRemoving(eventType, callBack);

        m_EventTable[eventType] = (CallBack<T, X, Y, Z>)m_EventTable[eventType] - callBack;

        OnListenerRemoned(eventType);
    }
    /// <summary>
    /// 移除五个参数监听
    /// </summary>
    /// <param name="eventType"></param>
    /// <param name="callBack"></param>
    public static void RemoveAddListener<T, X, Y, Z, W>(EventType eventType, CallBack<T, X, Y, Z, W> callBack)
    {
        OnListenerRemoving(eventType, callBack);

        m_EventTable[eventType] = (CallBack<T, X, Y, Z, W>)m_EventTable[eventType] - callBack;

        OnListenerRemoned(eventType);
    }
    #endregion
    #region BroadCast
    /// <summary>
    /// 无参数广播
    /// </summary>
    /// <param name="eventType"></param>
    public static void BroadCast(EventType eventType)
    {
        Delegate d;
        if (m_EventTable.TryGetValue(eventType, out d))
        {
            CallBack callBack = d as CallBack;
            if (callBack != null)
            {
                callBack();
            }
            else
            {
                throw new Exception(string.Format("广播事件错误：事件{0}对应的委托有不相同的类型", callBack));
            }
        }
    }
    /// <summary>
    /// 一个参数广播
    /// </summary>
    /// <param name="eventType"></param>
    public static void BroadCast<T>(EventType eventType, T arg)
    {
        Delegate d;
        if (m_EventTable.TryGetValue(eventType, out d))
        {
            CallBack<T> callBack = d as CallBack<T>;
            if (callBack != null)
            {
                callBack(arg);
            }
            else
            {
                throw new Exception(string.Format("广播事件错误：事件{0}对应的委托有不相同的类型", callBack));
            }
        }
    }
    /// <summary>
    /// 两个参数广播
    /// </summary>
    /// <param name="eventType"></param>
    public static void BroadCast<T, X>(EventType eventType, T arg1, X arg2)
    {
        Delegate d;
        if (m_EventTable.TryGetValue(eventType, out d))
        {
            CallBack<T, X> callBack = d as CallBack<T, X>;
            if (callBack != null)
            {
                callBack(arg1, arg2);
            }
            else
            {
                throw new Exception(string.Format("广播事件错误：事件{0}对应的委托有不相同的类型", callBack));
            }
        }
    }
    /// <summary>
    /// 三个参数广播
    /// </summary>
    /// <param name="eventType"></param>
    public static void BroadCast<T, X, Y>(EventType eventType, T arg1, X arg2, Y arg3)
    {
        Delegate d;
        if (m_EventTable.TryGetValue(eventType, out d))
        {
            CallBack<T, X, Y> callBack = d as CallBack<T, X, Y>;
            if (callBack != null)
            {
                callBack(arg1, arg2, arg3);
            }
            else
            {
                throw new Exception(string.Format("广播事件错误：事件{0}对应的委托有不相同的类型", callBack));
            }
        }
    }
    /// <summary>
    /// 四个参数广播
    /// </summary>
    /// <param name="eventType"></param>
    public static void BroadCast<T, X, Y, Z>(EventType eventType, T arg1, X arg2, Y arg3, Z arg4)
    {
        Delegate d;
        if (m_EventTable.TryGetValue(eventType, out d))
        {
            CallBack<T, X, Y, Z> callBack = d as CallBack<T, X, Y, Z>;
            if (callBack != null)
            {
                callBack(arg1, arg2, arg3, arg4);
            }
            else
            {
                throw new Exception(string.Format("广播事件错误：事件{0}对应的委托有不相同的类型", callBack));
            }
        }
    }
    /// <summary>
    /// 五个参数广播
    /// </summary>
    /// <param name="eventType"></param>
    public static void BroadCast<T, X, Y, Z, W>(EventType eventType, T arg1, X arg2, Y arg3, Z arg4, W arg5)
    {
        Delegate d;
        if (m_EventTable.TryGetValue(eventType, out d))
        {
            CallBack<T, X, Y, Z, W> callBack = d as CallBack<T, X, Y, Z, W>;
            if (callBack != null)
            {
                callBack(arg1, arg2, arg3, arg4, arg5);
            }
            else
            {
                throw new Exception(string.Format("广播事件错误：事件{0}对应的委托有不相同的类型", callBack));
            }
        }
    }
    #endregion
}
###第二个脚本

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

public enum EventType
{
   ShowText
}
###第三个脚本

public delegate void CallBack();
public delegate void CallBack<T>(T arg);
public delegate void CallBack<T,X>(T arg1,X arg2);
public delegate void CallBack<T, X,Y>(T arg1, X arg2,Y arg3);
public delegate void CallBack<T, X, Y,Z>(T arg1, X arg2, Y arg3,Z arg4);
public delegate void CallBack<T, X, Y, Z,W>(T arg1, X arg2, Y arg3, Z arg4,W arg5);

###第四个脚本

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

public class Test_Show : MonoBehaviour {

    private void Awake()
    {
        gameObject.SetActive(false);
        EventCenter.AddListener<string,string>(EventType.ShowText, Show);
    }
    private void OnDestroy()
    {
        EventCenter.RemoveAddListener<string,string>(EventType.ShowText, Show);
    }
    public void Show()
    {
        gameObject.SetActive(true);
    }
    public void Show(string text1,string text2)
    {
        gameObject.SetActive(true);
        GetComponent<Text>().text = text1+text2;
    }
}

###第五个脚本

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

public class BtnClick : MonoBehaviour {

    private void Awake()
    {
        GetComponent<Button>().onClick.AddListener(() => { EventCenter.BroadCast(EventType.ShowText,"我是","小宇"); });
    }

}