TypeEventSystem.cs

using System;
using System.Collections.Generic;
using Cnoom.UnityTool.SingletonUtils;

namespace Cnoom.UnityTool.EventUtils
{
    /// <summary>
    /// 触发事件基类,可以在里面添加参数
    /// </summary>
    public interface EventArgBase
    {

    }
    

    // 事件系统的单例类，用于管理事件的订阅和触发
    public class TypeEventSystem : Singleton<TypeEventSystem>, IEventSystem
    {
        private Dictionary<Type, List<Delegate>> eventHandlers = new Dictionary<Type, List<Delegate>>();

        private TypeEventSystem()
        {
        }

        // 订阅事件
        public void Subscribe<TEventArgs>(Action<TEventArgs> handler) where TEventArgs : EventArgBase
        {
            var eventType = typeof(TEventArgs);
            if(!eventHandlers.ContainsKey(eventType))
            {
                eventHandlers[eventType] = new List<Delegate>();
            }
            eventHandlers[eventType].Add(handler);
        }

        // 取消订阅
        public void Unsubscribe<TEventArgs>(Action<TEventArgs> handler) where TEventArgs : EventArgBase
        {
            var eventType = typeof(TEventArgs);
            if(eventHandlers.ContainsKey(eventType))
            {
                eventHandlers[eventType].Remove(handler);
                if(eventHandlers[eventType].Count == 0)
                {
                    eventHandlers.Remove(eventType);
                }
            }
        }

        // 触发事件
        public void TriggerEvent<TEventArgs>(TEventArgs eventArgs) where TEventArgs : EventArgBase
        {
            var eventType = typeof(TEventArgs);
            if(eventHandlers.ContainsKey(eventType))
            {
                // 创建一个副本列表，以避免在遍历和触发过程中可能出现的并发修改异常
                var handlersCopy = new List<Delegate>(eventHandlers[eventType]);
                foreach (var handler in handlersCopy)
                {
                    ((Action<TEventArgs>)handler)(eventArgs);
                }
            }
        }
    }
}