观察者模式

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

/// 观察者模式
/// by:zdz
/// date:20220328
/// 
public class Dispatcher : Singleton
{
    public delegate void ActionHandler(params object[] param);
    private Dictionary handlerDictionary = new Dictionary();
    /// 

    /// 增加监听
    /// 
    /// 
    /// 
    public void AddListener(int id, ActionHandler handler)
    {
        if (handlerDictionary.ContainsKey(id))
        {
            handlerDictionary[id] += handler;
        }
        else
        {
            handlerDictionary.Add(id, handler);
        }
    }
    /// 

    /// 移除监听
    /// 
    /// 
    /// 
    public void RemoveListener(int id, ActionHandler handler)
    {
        if (handlerDictionary.ContainsKey(id))
        {
            if (handlerDictionary[id] != null)
            {
                handlerDictionary[id] -= handler;
            }
            else
            {
                handlerDictionary.Remove(id);
            }
        }
    }
    /// 

    /// 派发
    /// 
    /// 
    /// 
    public void Dispatch(int id, params object[] param)
    {
        if (handlerDictionary.ContainsKey(id))
        {
            if (handlerDictionary[id] != null)
            {
                handlerDictionary[id](param);
            }
        }
    }
}