unity 使用TCP协议传输数据

在Unity中使用TCP协议传输数据可以通过使用C#中的Socket类来实现。下面是一个简单的示例代码，展示了如何在Unity中使用TCP协议传输数据：

using System;
using System.Net;
using System.Net.Sockets;
using System.Text;
using UnityEngine;

public class TCPClient : MonoBehaviour
{
    private TcpClient client;
    private NetworkStream stream;
    private byte[] receiveBuffer;

    private void Start()
    {
        ConnectToServer("127.0.0.1", 8888); // 连接到服务器的IP和端口
    }

    private void ConnectToServer(string serverIP, int serverPort)
    {
        try
        {
            client = new TcpClient();
            client.Connect(serverIP, serverPort);
            stream = client.GetStream();
            receiveBuffer = new byte[1024];

            // 启动异步接收数据
            stream.BeginRead(receiveBuffer, 0, receiveBuffer.Length, OnReceiveData, null);
        }
        catch (Exception e)
        {
            Debug.Log("连接服务器失败：" + e.Message);
        }
    }

    private void OnReceiveData(IAsyncResult ar)
    {
        try
        {
            int bytesRead = stream.EndRead(ar);
            if (bytesRead <= 0)
            {
                Debug.Log("与服务器断开连接");
                return;
            }

            string receivedMessage = Encoding.ASCII.GetString(receiveBuffer, 0, bytesRead);
            Debug.Log("收到服务器消息：" + receivedMessage);

            // 继续异步接收数据
            stream.BeginRead(receiveBuffer, 0, receiveBuffer.Length, OnReceiveData, null);
        }
        catch (Exception e)
        {
            Debug.Log("接收数据时发生错误：" + e.Message);
        }
    }

    private void SendMessageToServer(string message)
    {
        try
        {
            byte[] data = Encoding.ASCII.GetBytes(message);
            stream.Write(data, 0, data.Length);
            Debug.Log("发送消息到服务器：" + message);
        }
        catch (Exception e)
        {
            Debug.Log("发送消息时发生错误：" + e.Message);
        }
    }

    private void OnDestroy()
    {
        if (stream != null)
            stream.Close();

        if (client != null)
            client.Close();
    }

    // 示例使用的按钮点击事件
    public void SendButtonOnClick()
    {
        SendMessageToServer("Hello, Server!");
    }
}

以上示例代码是一个简单的TCP客户端，它通过Socket连接到指定的服务器IP和端口，然后可以发送和接收数据。你可以根据自己的需求进行修改和扩展。