发送自定义网络消息Unity多人游戏

Question

我想在连接的播放器之间发送自定义消息，为此，我参考了以下教程：

Network Messages

EmptyMessage

我已经编写了此类代码并进行了测试：

public class DodgelsNetworkMessages : NetworkBehaviour {

    const short MESSAGE_ID = 1002;

    public void SendMessage ()
    {
        GameHUDController.Instance.UpdateDebugMesssage ("\nSendMessage");

        NetworkServer.RegisterHandler (MESSAGE_ID, OnMessageReceived);
        var msg = new EmptyMessage();
       //           NetworkClient.allClients[0].Send (MESSAGE_ID, emtyBase);
        NetworkServer.SendToAll (MESSAGE_ID, msg);
    }


    public void OnMessageReceived(NetworkMessage netMsg){
        GameHUDController.Instance.UpdateDebugMesssage ("\nNetwork Message received...");
    }
}

我无法调用OnMessageReceived方法，请给我一些建议，肯定是我做错了。