Unity UDP（不需要Socket）

1.接收端：

using System.Collections;
using System.Collections.Generic;
using System.Net;
using System.Net.Sockets;
using System.Text;
using System.Threading;
using UnityEngine;
using UnityEngine.SceneManagement;

public class UDPClient2Msg : MonoBehaviour {
    UdpClient client = null;
    string receiveString = null;
    byte[] receiveData = null;
    IPEndPoint remotePoint;
    Thread thread= null;
    private bool ChangeScene;

    // Use this for initialization
    void Start () {
        remotePoint = new IPEndPoint(IPAddress.Any, 0);
        thread = new Thread(ReceiveMsg);
        thread.Start();
    }
    string stateStr = "STATE-END";
	void ReceiveMsg()
    {
        while (true)
        {
            // u3d接收端口
            client = new UdpClient(9000);
            receiveData = client.Receive(ref remotePoint);//接收数据 
            receiveString = Encoding.UTF8.GetString(receiveData);
            Debug.Log(receiveString + "----------->");
          
            if (receiveString.Trim().CompareTo("STATE-END") != 0)
            {
                ChangeScene = true;
            }
            client.Close();//关闭连接 
        }
    }
    void Update()
    {
        if (ChangeScene)
        {
            ChangeScene = false;
            receiveString = null;
            SceneManager.LoadScene("Scene0-ZLoadingScene");
            Debug.Log("切换场景");
        }
    }
    void SocketQuit()
    {
       
        thread.Abort();
        thread.Interrupt();
        client.Close();
        

    }

    void OnDestroy()
    {
        SocketQuit();
    }
    void OnApplicationQuit()
    {
        SocketQuit();
    }

}

2.发送端：

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

/// <summary>
/// 发送脚本
/// </summary>
public class UDPClient1Msg : MonoBehaviour {
    string sendString = null;//要发送的字符串 
    byte[] sendData = null;//要发送的字节数组 
    UdpClient client = null;
    public static UDPClient1Msg Instance;
    private void Awake()
    {
        Instance = this;

    }
 
   public  void SendMsg(string sendStr)
    {
        IPAddress remoteIP = IPAddress.Parse("127.0.0.1"); //假设发送给这个IP
        int remotePort = 9000;
        IPEndPoint remotePoint = new IPEndPoint(remoteIP, remotePort);//实例化一个远程端点 
        if (sendStr != null)
        {
            sendData = Encoding.Default.GetBytes(sendStr);
            client = new UdpClient();
            client.Send(sendData, sendData.Length, remotePoint);//将数据发送到远程端点 
            client.Close();//关闭连接 
            sendString = null;
        }
    }
}