/// <summary>
 /// 监听链接事件
 /// </summary>
 /// <param name="netEvent"></param>
 /// <param name="callback"></param>
 public void RegisterNetEventListener(NetEvent netEvent, OnNetEventCallback callback)
 {
     if (_netListeners.ContainsKey(netEvent))
     {
         _netListeners[netEvent] += callback;
     }
     else
     {
         _netListeners[netEvent] = callback;
     }
 }
 public void UnRegisterNetEventListener(NetEvent netEvent, OnNetEventCallback callback)
 {
     if (_netListeners.ContainsKey(netEvent))
     {
         _netListeners[netEvent] -= callback;
         if (_netListeners[netEvent] == null)
         {
             _netListeners.Remove(netEvent);
         }
     }
 }