C#事件管理器清空所有监听的实现方法-创新互联

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这篇文章主要讲解了C#事件管理器清空所有监听的实现方法，内容清晰明了，对此有兴趣的小伙伴可以学习一下，相信大家阅读完之后会有帮助。

C#事件使用+= -=使用起来是很方便的，但是却不能整体清空所有事件。比如一个常见的操作，打开界面注册监听事件，关闭界面需要把所有的事件清空了，这要在写一堆-=操作，如果漏清空的话肯定会造成隐患，如果在lua里这个很容易，但是C#却不行。所以我想了个办法，对Action和Func进行一次包装，就可以解决这个问题了。

这里我只封装了两个参数，大家可以继续拓展新的参数，我在项目里一共拓展了5个参数，完全够用了。

using System;
using System.Collections.Generic;
 
public class ActionManager
{
  Dictionary m_Actions = new Dictionary();
 
  public NewAction RegAction(NewAction newAction , Action action)
  {
    newAction += action;
    m_Actions[newAction] = action;
    return newAction;
  }
  public NewAction RegAction(NewAction newAction, Action action)
  {
    newAction += action;
    m_Actions[newAction] = action;
    return newAction;
  }
  public NewFunc RegAction(NewFunc newAction, Func action)
  {
    newAction += action;
    m_Actions[newAction] = action;
    return newAction;
  }
  public NewFunc RegAction(NewFunc newAction, Func action)
  {
    newAction += action;
    m_Actions[newAction] = action;
    return newAction;
  }
 
  public void Clear()
  {
    foreach (var act in m_Actions)
    {
      ((IAction)act.Key).Dispose(act.Value);
    }
  }
}
 
public interface IAction
{
  void Dispose(object obj);
}
public class NewAction : IAction
{
  Action action;
  public void Dispose(object obj)
  {
    if(obj is Action act)
      action -= act;
  }
  public void Invoke()
  {
    action?.Invoke();
  }
  public static NewAction operator +(NewAction a, Action b)
  {
    a.action -= b;
    a.action += b;
    return a;
  }
  public static NewAction operator -(NewAction a, Action b)
  {
    a.action -= b;
    return a;
  }
}
public class NewAction : IAction
{
  Action action;
  public void Dispose(object obj)
  {
    if (obj is Action act)
      action -= act;
  }
  public void Invoke(T1 t1)
  {
    action?.Invoke(t1);
  }
  public static NewAction operator +(NewAction a, Action b)
  {
    a.action -= b;
    a.action += b;
    return a;
  }
  public static NewAction operator -(NewAction a, Action b)
  {
    a.action -= b;
    return a;
  }
}
public class NewFunc : IAction
{
  Func func;
  public void Dispose(object obj)
  {
    if (obj is Func act)
      func -= act;
  }
  public T1 Invoke()
  {
    return func != null ? func.Invoke() : default(T1);
  }
  public static NewFunc operator +(NewFunc a, Func b)
  {
    a.func -= b;
    a.func += b;
    return a;
  }
  public static NewFunc operator -(NewFunc a, Func b)
  {
    a.func -= b;
    return a;
  }
}
public class NewFunc : IAction
{
  Func func;
  public void Dispose(object obj)
  {
    if (obj is Func act)
      func -= act;
  }
  public T2 Invoke(T1 t1)
  {
    return func != null ? func.Invoke(t1) : default(T2);
  }
  public static NewFunc operator +(NewFunc a, Func b)
  {
    a.func -= b;
    a.func += b;
    return a;
  }
  public static NewFunc operator -(NewFunc a, Func b)
  {
    a.func -= b;
    return a;
  }
}