最近在研究广播系统,写下来记录一下,好记性不如烂笔头。简单写了无参数广播事件系统
using System;
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
public delegate void CallBack();//需要有参数的直接在这加上需要的参数就可以实现参数广播。
public enum EventTypee//广播事件
{
test
}
public class EventCenter : MonoBehaviour
{
private static Dictionary<EventTypee, Delegate> dic = new Dictionary<EventTypee, Delegate>();
/// <summary>
/// 添加事件监听
/// </summary>
/// <param name="eventType"></param>
/// <param name="callBack"></param>
public static void AddListener(EventTypee eventTypee,CallBack callBack)
{
if (!dic.ContainsKey(eventTypee))
{
dic.Add(eventTypee, null);
}
//异常抛出
Delegate m = dic[eventTypee];
if (m != null && m.GetType() != callBack.GetType())
{
throw new Exception(string.Format("事件{0}为不同委托,对应为{1},添加类型为{2}", eventTypee, m.GetType(), callBack.GetType()));
}
dic[eventTypee] = (CallBack)dic[eventTypee] + callBack;
}
/// <summary>
/// 移除监听事件
/// </summary>
/// <param name="eventTypee"></param>
/// <param name="callBack"></param>
public static void RemoveListener(EventTypee eventTypee,CallBack callBack)
{
//异常抛出
if (dic.ContainsKey(eventTypee))
{
Delegate m = dic[eventTypee];
if(m == null)
{
throw new Exception(string.Format("错误;事件{0}没有添加", eventTypee));
}
else if (m.GetType()!= callBack.GetType())
{
throw new Exception(string.Format("移除错误,事件{0}于事件{1}为不同委托", m.GetType(), callBack.GetType()));
}
}
else
{
throw new Exception(string.Format("错误,没有事件{0}", eventTypee));
}
dic[eventTypee] = (CallBack)dic[eventTypee] - callBack;
if (dic[eventTypee] == null)
{
dic.Remove(eventTypee);
}
}
/// <summary>
/// 事件的广播
/// </summary>
/// <param name="eventTypee"></param>
public static void Broadcast(EventTypee eventTypee)
{
Delegate m;
if (dic.TryGetValue(eventTypee, out m))
{
CallBack callBack = m as CallBack;
if(callBack != null)
{
callBack();
}
else
{
throw new Exception(string.Format("错误,事件已存在", eventTypee));
}
}
}
}
测试一下
using System;
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
public class NewBehaviourScript : MonoBehaviour
{
private void Awake()
{
EventCenter.AddListener(EventTypee.test, Show1);
}
private void Show1()
{
Debug.Log("广播成功");
}
private void OnDestroy()
{
EventCenter.RemoveListener(EventTypee.test, Show1);
}
public void OnShowBtnClick()
{
EventCenter.Broadcast(EventTypee.test);
}
}