帮我写一个用tcp协议通信，可以让unity接收服务器数据的代码

以下是用TCP协议通信的Unity客户端代码示例，用于接收服务器数据：

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

public class TCPClient : MonoBehaviour
{
    private TcpClient client;
    private NetworkStream stream;
    private byte[] receiveBuffer = new byte[1024];

    public void ConnectToServer(string serverIP, int serverPort)
    {
        try
        {
            client = new TcpClient(serverIP, serverPort);
            stream = client.GetStream();
            Debug.Log("Connected to server.");
            // Send any initial messages to server here if needed
            // ...
            // Start listening for server messages
            BeginReceive();
        }
        catch (Exception e)
        {
            Debug.LogError("Failed to connect to server: " + e.Message);
        }
    }

    private void BeginReceive()
    {
        stream.BeginRead(receiveBuffer, 0, receiveBuffer.Length, OnReceive, null);
    }

    private void OnReceive(IAsyncResult ar)
    {
        int bytesRead = stream.EndRead(ar);
        if (bytesRead > 0)
        {
            string message = System.Text.Encoding.ASCII.GetString(receiveBuffer, 0, bytesRead);
            Debug.Log("Received message from server: " + message);
            // Process the received message here as needed
            // ...
            // Start listening for more server messages
            BeginReceive();
        }
        else
        {
            Debug.LogError("Connection to server closed.");
            // Handle disconnection from server here if needed
            // ...
        }
    }

    public void SendMessageToServer(string message)
    {
        if (client == null || !client.Connected)
        {
            Debug.LogError("Not connected to server.");
            return;
        }
        try
        {
            byte[] messageBytes = System.Text.Encoding.ASCII.GetBytes(message);
            stream.Write(messageBytes, 0, messageBytes.Length);
            Debug.Log("Sent message to server: " + message);
        }
        catch (Exception e)
        {
            Debug.LogError("Failed to send message to server: " + e.Message);
        }
    }

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

使用方法：

1. 在Unity中创建一个空对象并将此脚本组件添加到它上面。
2. 在需要连接到服务器的地方调用`ConnectToServer()`方法，传入服务器IP和端口号。
3. 在需要向服务器发送消息的地方调用`SendMessageToServer()`方法，传入要发送的消息。
4. 当从服务器接收到消息时，将调用`OnReceive()`方法并处理接收到的消息。
5. 当与服务器的连接断开时，将调用`OnDestroy()`方法并清理资源。

请注意，此代码示例仅演示了基本的TCP连接和数据传输，不包括错误处理和其他高级功能，例如安全性和可靠性。在实际使用中，您需要进行适当的错误处理和添加所需的功能。