Swift开发：GCDAsyncUdpSocket 通信之UDP广播

概述       功能需求：                  发送广播，搜索设备 【在wifi下无法接收广播，原因: 路由器阻止广播】 1 使用GCDAsyncUdpSocket 实现广播    下载地址：包含tcp和udp，共4个文件 http://download.csdn.net/detail/taoerit/9809540 2 Swift Code: // //  ViewControlle

功能需求：

发送广播，搜索设备

【在wifi下无法接收广播，原因: 路由器阻止广播】

1 使用GcdasyncUdpSocket 实现广播 下载地址：包含tcp和udp，共4个文件http://download.csdn.net/detail/taoerit/9809540 2 Swift Code:

//

// VIEwController.swift

// 3-SwiftSocket-udp

// Created by 黄涛 on 17/4/10.

// copyright © 2017年 huangtao. All rights reserved.

//

import UIKit

class VIEwController:UIVIEwController,GcdasyncUdpSocketDelegate {

@IBOutletweakvar btnStart:UIbutton!

@IBOutletweakvar lbRecvMsg:UITextVIEw!

var mainQueue =dispatch_get_main_queue()

var udp:GcdasyncUdpSocket!;

let localPort:UInt16 =54321;

let boardcasePort:UInt16 =1001;

overrIDefunc vIEwDIDLoad() {

super.vIEwDIDLoad()

btnStart.addTarget(self,action:"btnStartClickFun",forControlEvents:UIControlEvents.touchUpInsIDe)

udp =GcdasyncUdpSocket(delegate:self,delegateQueue:dispatch_get_main_queue());

do

{

tryudp.enablebroadcast(true)

tryudp.bindtoport(localPort,interface:udpError);

tryudp.beginReceiving();

}

catch{

print("catch:\(udpError)")

}

}

var udpError:String?;

func btnStartClickFun(){

//开始广播

udp.sendData("#SYstem\n".dataUsingEnCoding(NSUTF8StringEnCoding),toHost: "255.255.255.255",port:boardcasePort,withTimeout: -1,tag:0);

}

func udpSocket(sock:GcdasyncUdpSocket!,dIDReceiveData data:NSData!,fromAddress address:NSData!,withFilterContext filterContext:AnyObject!) {

let recv:Nsstring =Nsstring(data: data,enCoding:NSUTF8StringEnCoding)!;

// 2 主界面ui显示数据

dispatch_async(mainQueue,{

let showStr:NSMutableString =NSMutableString()

showStr.appendString(recvasString)

showStr.appendString("\n")

self.lbRecvMsg.text = showStrasString;

})

}

func udpSocket(sock:GcdasyncUdpSocket!,dIDNotConnect error:NSError!) {

print("连接失败：\(error)")

}

func udpSocket(sock:GcdasyncUdpSocket!,dIDSendDataWithTag tag:Int) {

print("已经发送数据:\(tag)")

}

func udpSocketDIDClose(sock:GcdasyncUdpSocket!,withError error:NSError!) {

print("断开连接 error:\(error)")

}

func udpSocket(sock:GcdasyncUdpSocket!,dIDConnectToAddress address:NSData!) {

print("开始连接")

}

overrIDefunc dIDReceiveMemoryWarning() {

super.dIDReceiveMemoryWarning()

// dispose of any resources that can be recreated.

}

}

3 效果图 总结

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