素材：SocketIO for Unity

使用方法

1. 在Github中下载SocketIOUnity代码

1. 解压缩，然后将 SocketIOUnity 代码拖放到 Unity 项目中

1. 创建新的 C# 脚本

1. 写下代码

using System;
using SocketIOClient;
using SocketIOClient.Newtonsoft.Json;
using UnityEngine;
using UnityEngine.UI;
using Newtonsoft.Json.Linq;

public class SocketManager : MonoBehaviour
{
    public SocketIOUnity socket;
    private Rigidbody rigidBody;
    private int throttling = 0;

    void Start()
    {
        rigidBody = GetComponent<Rigidbody>(); // Load rigidBody to get car's speed

        Debug.Log("Init Socket");

        var uri = new Uri("<http://192.168.0.16:9981>"); // 该地址可在ProtoPie Connect界面的左下角找到
        socket = new SocketIOUnity(uri);

        socket.JsonSerializer = new NewtonsoftJsonSerializer();

        socket.OnConnected += (sender, e) => // this function is called when socketIO is connected
        {
            Debug.Log("socket.OnConnected");
        };
        socket.OnDisconnected += (sender, e) => // this function is called when socketIO is disconnected
        {
            Debug.Log("disconnect: " + e);
        };
        socket.OnReconnectAttempt += (sender, e) => // this function is called when socketIO retries to connect to server
        {
            Debug.Log($"{DateTime.Now} Reconnecting: attempt = {e}");
        };

        Debug.Log("Connecting...");
        socket.Connect();

        socket.OnUnityThread("ppMessage", (data) => // 该部分用来接收来自ProtoPie的讯号
        {
            Debug.Log(data.ToString());
        });
    }

    void Update()
    {
        if (throttling % 10 == 0) // Update function is called too frequently. so we need to restrict like this
        {
            socket.EmitStringAsJSON("ppMessage", '{' + "\\"messageId\\": \\"carTelemetry_speed\\"" + ',' + $"\\"value\\": \\"{rigidBody.velocity.magnitude}\\"" + '}');
            throttling = 0; //该部分用来定义发送到ProtoPie的信息和数值。ppMessage是ProtoPie默认识别信息，无需修改。
        }

        throttling += 1;
    }

    void OnDestroy()
    {
        Debug.Log("DESTROY!!!");
    }
}

1. 选择‘Car’并在‘Car’中添加脚本

结束