unity事件系统（广播系统）的学习笔记游戏weixin45072334的博客-

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); } }