unity简易事件分发器

一、EventFunction

using System;
namespace EventCore
{
    public struct EventFunction
    {
        public object _caller;
        public Action _action;
    }
    public struct EventFunction<T>
    {
        public object _caller;
        public Action<T> _action;
    }
}

二、Event<T>

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

namespace EventCore
{
    public class Event<T>
    {
        private readonly List<EventFunction<T>> _event = new List<EventFunction<T>>();

        public void AddListener(object caller, Action<T> action)
        {
            if (action != null)
            {
                for (int index = 0, max = _event.Count; index < max; index++)
                {
                    var element = _event[index];
                    if (element._caller == caller && element._action == action)
                    {
                        Debug.LogError("EventGeneric,重复添加事件:" + element._caller + "," + element._action.Method);
                        return;
                    }
                }
            }

            _event.Add(new EventFunction<T> { _caller = caller, _action = action });
        }

        public void RemoveListener(object caller, Action<T> action)
        {
            for (int index = _event.Count - 1; index >= 0; index--)
            {
                var element = _event[index];
                if (element._caller == caller && element._action == action)
                {
                    _event.RemoveAt(index);
                    return;
                }
            }
        }

        public void Trigger(T data)
        {
            for (int index = _event.Count - 1; index >= 0; index--)
            {
                var element = _event[index];
                if (element._action != null)
                {
                    element._action(data);
                }
                else
                {
                    Debug.LogError("EventGeneric: event removed");
                }
            }
        }
    }
}

三、Event

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

namespace EventCore
{
    public class Event
    {
        private readonly List<EventFunction> _event = new List<EventFunction>();
        
        public void AddListener(object caller, Action action)
        {
            if (action != null)
            {
                for (int index = 0, max = _event.Count; index < max; index++)
                {
                    var element = _event[index];
                    if (element._caller == caller && element._action == action)
                    {
                        Debug.LogError("EventGeneric,重复添加事件:" + element._caller + "," + element._action.Method);
                        return;
                    }
                }
            }

            _event.Add(new EventFunction { _caller = caller, _action = action });
        }

        public void RemoveListener(object caller, Action action)
        {
            for (int index = _event.Count - 1; index >= 0; index--)
            {
                var element = _event[index];
                if (element._caller == caller && element._action == action)
                {
                    _event.RemoveAt(index);
                    return;
                }
            }
        }

        public void Trigger()
        {
            for (int index = _event.Count - 1; index >= 0; index--)
            {
                var element = _event[index];
                if (element._action != null)
                {
                    element._action();
                }
                else
                {
                    Debug.LogError("EventGeneric: event removed");
                }
            }
        }
    }
}

四、使用分发器

事件定义：

using EventCore;

public class TestEvent
{
    public static Event<int> TestEvent1 = new Event<int>(); // 事件测试
    public static Event TestEvent2 = new Event(); // 事件测试
}

事件注册、事件注销：

TestEvent.TestEvent2.AddListener(this, OnTestEvent);
TestEvent.TestEvent2.RemoveListener(this, OnTestEvent);

private void OnTestEvent()
{

}

事件触发：

TestEvent.TestEvent2.Trigger();