接收UDP消息

Posted 2021-04-14

我在接收特定端口上的消息时遇到问题。发送工作正常。

代码看起来像这样：

import Foundation
import CocoaAsyncSocket


class InSocket: NSObject, GCDAsyncUdpSocketDelegate {

//let IP = "192.168.1.196"
let PORT:UInt16 = 14000
var isocket:GCDAsyncUdpSocket!

override init(){
    super.init()
    setupConnection()
}

func setupConnection(){

    isocket = GCDAsyncUdpSocket(delegate: self, delegateQueue: DispatchQueue.main)
    do{
        try isocket.bind(toPort:PORT)
        try isocket.beginReceiving()
      } catch {print("ErrorReceive")}
}


func udpSocket(sock: GCDAsyncUdpSocket!, didReceiveData data: NSData, fromAddress address: NSData!, withFilterContext filterContext: AnyObject!) {
    let str = NSString(data: data as Data, encoding: String.Encoding.ascii.rawValue)
    print(str)

}
}

我在网络统计中看到应用程序正在接收数据包：Packets

但我在控制台中看不到任何内容。一些想法？

答案

在委托函数之前添加：func udpSocket（....）该属性

@objc（udpSocket：didReceiveData：FROMADDRESS：withFilterContext :)

XCode 8会发出警告，但不注意，UDP数据包会到达。