在Unity中 用C#实现自定义的事件系统
用法：
EventUtil.AddListener("事件名称", 回调方法) // 添加事件监听器
EventUtil.RemoveListener("事件名称", 回调方法) // 移除事件监听器
EventUtil.DispatchEvent("事件名称", 不定长参数...) // 派发事件实现效果：
事件工具
EventUtil.cs
namespace Pers.ZY.Events {
/// <summary>
/// 事件工具
/// <para>ZhangYu 2019-03-04</para>
/// </summary>
public static class EventUtil {
/// <summary> 事件派发器 </summary>
private static EventDispatcher dispatcher = new EventDispatcher();
/// <summary> 添加事件监听器 </summary>
/// <param name="eventType">事件类型</param>
/// <param name="eventHandler">事件处理器</param>
public static void AddListener(string eventType, EventListener.EventHandler eventHandler) {
dispatcher.AddListener(eventType, eventHandler);
}
/// <summary> 移除事件监听器 </summary>
/// <param name="eventType">事件类型</param>
/// <param name="eventHandler">事件处理器</param>
public static void RemoveListener(string eventType, EventListener.EventHandler eventHandler) {
dispatcher.RemoveListener(eventType, eventHandler);
}
/// <summary> 是否已经拥有该类型的事件 </summary>
/// <param name="eventType">事件类型</param>
public static bool HasListener(string eventType) {
return dispatcher.HasListener(eventType);
}
/// <summary> 派发事件 </summary>
/// <param name="eventType">事件类型</param>
public static void DispatchEvent(string eventType, params object[] args) {
dispatcher.DispatchEvent(eventType, args);
}
/// <summary> 清理所有事件监听器 </summary>
public static void Clear() {
dispatcher.Clear();
}
}
}事件派发器
EventDispatcher.cs
using System.Collections.Generic;
namespace Pers.ZY.Events {
/// <summary>
/// 事件派发器
/// <para>ZhangYu 2019-03-05</para>
/// </summary>
public class EventDispatcher {
/// <summary> 事件Map </summary>
private Dictionary<string, EventListener> dic = new Dictionary<string, EventListener>();
/// <summary> 添加事件监听器 </summary>
/// <param name="eventType">事件类型</param>
/// <param name="eventHandler">事件处理器</param>
public void AddListener(string eventType, EventListener.EventHandler eventHandler) {
EventListener invoker;
if (!dic.TryGetValue(eventType, out invoker)) {
invoker = new EventListener();
dic.Add(eventType, invoker);
}
invoker.eventHandler += eventHandler;
}
/// <summary> 移除事件监听器 </summary>
/// <param name="eventType">事件类型</param>
/// <param name="eventHandler">事件处理器</param>
public void RemoveListener(string eventType, EventListener.EventHandler eventHandler) {
EventListener invoker;
if (dic.TryGetValue(eventType, out invoker)) invoker.eventHandler -= eventHandler;
}
/// <summary> 是否已经拥有该类型的事件 </summary>
/// <param name="eventType">事件类型</param>
public bool HasListener(string eventType) {
return dic.ContainsKey(eventType);
}
/// <summary> 派发事件 </summary>
/// <param name="eventType">事件类型</param>
public void DispatchEvent(string eventType, params object[] args) {
EventListener invoker;
if (dic.TryGetValue(eventType, out invoker)) {
EventArgs evt;
if (args == null || args.Length == 0) {
evt = new EventArgs(eventType);
} else {
evt = new EventArgs(eventType, args);
}
invoker.Invoke(evt);
}
}
/// <summary> 清理所有事件监听器 </summary>
public void Clear() {
foreach (EventListener value in dic.Values) {
value.Clear();
}
dic.Clear();
}
}
}事件监听器
EventListener.cs
namespace Pers.ZY.Events {
/// <summary>
/// 事件监听器
/// <para>ZhangYu 2019-03-05</para>
/// </summary>
public class EventListener {
/// <summary> 事件处理器委托 </summary>
public delegate void EventHandler(EventArgs eventArgs);
/// <summary> 事件处理器集合 </summary>
public EventHandler eventHandler;
/// <summary> 调用所有添加的事件 </summary>
public void Invoke(EventArgs eventArgs) {
if (eventHandler != null) eventHandler.Invoke(eventArgs);
}
/// <summary> 清理所有事件委托 </summary>
public void Clear() {
eventHandler = null;
}
}
}事件数据
EventArgs.cs
namespace Pers.ZY.Events {
/// <summary> 事件参数
/// <para>ZhangYu 2019-03-05</para>
/// </summary>
public class EventArgs {
/// <summary> 事件类型 </summary>
public readonly string type;
/// <summary> 事件参数 </summary>
public readonly object[] args;
public EventArgs(string type) {
this.type = type;
}
public EventArgs(string type, params object[] args) {
this.type = type;
this.args = args;
}
}
}事件派发测试
using UnityEngine;
using Pers.ZY.Events;
/// <summary> 派发事件测试 </summary>
public class EventDispatchTest : MonoBehaviour {
public void Call() {
EventUtil.DispatchEvent(EventHandleTest.ON_CLICK);
EventUtil.DispatchEvent(EventHandleTest.ON_CLICK2, "参数1");
}
}事件接收测试
using UnityEngine;
using Pers.ZY.Events;
/// <summary> 处理事件测试 </summary>
public class EventHandleTest : MonoBehaviour {
// 定义事件名称
public const string ON_CLICK = "ON_CLICK";
// 定义事件名称
public const string ON_CLICK2 = "ON_CLICK2";
private void Start () {
// 添加监听器
if (!EventUtil.HasListener(ON_CLICK)) EventUtil.AddListener(ON_CLICK, OnClick);
if (!EventUtil.HasListener(ON_CLICK2)) EventUtil.AddListener(ON_CLICK2, OnClick2);
}
// 处理点击事件
public void OnClick(EventArgs evt) {
print(evt.type);
print(evt.args);
}
// 带参数的点击事件
public void OnClick2(EventArgs evt) {
print(evt.type);
print(evt.args[0]);
}
// 移除监听器
private void OnDestroy() {
EventUtil.RemoveListener(ON_CLICK, OnClick);
EventUtil.RemoveListener(ON_CLICK2, OnClick2);
}
}