GlobalConfig.NetworkEventAvailable

描述

定义可用于在主机（由 hostID 定义）拥有网络事件时获取通知的回调委托。系统会对所有事件类型（NetworkEventType.Nothing 除外）调用该回调。

另请参阅：NetworkEventType

此回调将从 IO 线程调用。如果您通过此回调长时间执行某个操作，它会影响您的 IO 操作性能，因此，您应尽快从此类操作中返回。

using System;
using UnityEngine;
using UnityEngine.Networking;

public class Test : MonoBehaviour
{
    static int receiveCallbackOld = 0;
    static int receiveCallbackNew = 0;
    static int recHostId = -1;

    //...
    public static void ReceiveCallback(int hostId)
    {
        ++receiveCallbackNew;   //Notify main thread that ReceiveFromHost(hostId, ...) should be called, because there is incoming event waiting to read
        recHostId = hostId;
    }

    void Start()
    {
        GlobalConfig config = new GlobalConfig();
        config.NetworkEventAvailable = ReceiveCallback;

        //....
    }

    void Update()
    {
        int recConnectionId = 0;
        int recChannelId = -1;
        var recArray = new byte[1400];
        int recSize = 0;
        byte error;
        if (receiveCallbackNew != receiveCallbackOld)
        {
            receiveCallbackNew = receiveCallbackOld;
            var networkEvent = NetworkTransport.ReceiveFromHost(recHostId, out recConnectionId, out recChannelId, recArray, (ushort)recArray.Length, out recSize, out error);
            Debug.Assert(networkEvent != NetworkEventType.Nothing);
        }
    }
}