unity udp未接收

Question

我正在尝试制作一个网络脚本，它将查找局域网上的所有游戏服务器，但我遇到了一些麻烦；导入System.Net.Sockets；

导入System.Net.Sockets；

private var udp_server:UdpClient;
private var udp_client:UdpClient;
private var udp_port:int = 18000;
private var udp_broadcast_ip:IPAddress = IPAddress.Parse ("224.0.0.224");

private var selected:boolean = false;

private var udp_received_message:String;

function StartServer(){

    udp_server = new UdpClient(udp_port, AddressFamily.InterNetwork);
    var udp_endpoint:IPEndPoint = new IPEndPoint(udp_broadcast_ip, udp_port);
    udp_server.Connect (udp_endpoint);

    InvokeRepeating("StartBroadcastUDP", 0.0,0.3);
}

function StartClient(){
    if(udp_client == null){
        udp_client = new UdpClient(udp_port);
        udp_client.BeginReceive(new AsyncCallback(StartReceiveUDP), null);
        Debug.Log("Searching for udp");
    }
}

function StartBroadcastUDP(){
    var udp_broadcast_message:String = "GAME SERVER";

    if(udp_broadcast_message != ""){
        udp_server.Send(Encoding.ASCII.GetBytes (udp_broadcast_message), udp_broadcast_message.Length);
    }
}

function StartReceiveUDP(result:IAsyncResult){
    Debug.Log("Searching for udp");
    var udp_endpoint:IPEndPoint = new IPEndPoint(IPAddress.Any, udp_port);
    var udp_received_message_byte:byte[];

    if(udp_client != null){
        udp_received_message_byte = udp_client.EndReceive(result, udp_endpoint);
    }else{
        return;
    }

    udp_client.BeginReceive(new AsyncCallback(StartReceiveUDP), null);
    udp_received_message = Encoding.ASCII.GetString(udp_received_message_byte);
    Debug.Log("Searching for udp");
}

function Update(){
    if(udp_received_message != null){
        Debug.Log("Received Message: " + udp_received_message);
    }
}

function OnGUI(){
    if(!selected){
        if(GUI.Button(Rect(0, 0, 50, 50), "Server")){
            StartServer();
            selected = true;
        }else if(GUI.Button(Rect(50, 0, 50, 50), "Client")){
            StartClient();
            selected = true;
        }
    }
}

它看起来当我开始接收udp (Startclient中的BeginReceive)时，它只是计划没有id。为了确认这一点，我添加了几个debug.logs，但仍然一无所获

Answer 1

不幸的是，异步调用在Unity中是有问题的。您可以在线程中使用阻塞调用，或者在主线程中使用非阻塞调用(在Update方法中)。