我正在寻找GCDAsyncUdpSocket的一些例子，但发现没有一个可行

didReceiveData从未被调用过 – 我编写了这个swift类，它被我的主线UIViewController调用，向服务器发送一条消息，接收它确定，但是当服务器发回响应时，客户端永远不会收到它，因为didReceiveData（）是从未触发过。

我一直在谷歌搜索并查看文档，它说客户端不需要绑定（只有服务器需要这样做）任何人都可以帮助我 – 提前谢谢。

import UIKit import CocoaAsyncSocket class UdpSocketSR: NSObject, GCDAsyncUdpSocketDelegate { var socket:GCDAsyncUdpSocket! var rc : Int = 0 var messageOut : String = "" var messageIn : String = "" override init(){ super.init() } func SetupAndSend(IP: String, PORT: Int, DATA : String) -> Int { socket = GCDAsyncUdpSocket(delegate: self, delegateQueue: DispatchQueue.main) messageOut = DATA do { let data = messageOut.data(using: String.Encoding.utf8) socket.send(data!, toHost: IP, port: UInt16(PORT), withTimeout: 3, tag: 0) try socket.beginReceiving() sleep(3) socket.close() } catch { rc = -1 } return rc } private func udpSocket(sock:GCDAsyncUdpSocket!,didConnectToAddress data : NSData!){ rc = -2 } private func udpSocket(sock: GCDAsyncUdpSocket!, didReceiveData dataRecv: NSData!, fromAddress address: NSData!, withFilterContext filterContext: AnyObject!) { messageIn = NSString(data: dataRecv as Data, encoding: String.Encoding.utf8.rawValue) as! String } } 

Answer 1

为什么在发送后关闭套接字？ 它适用于绑定我。

 class UdpSocketSR: GCDAsyncSocket, GCDAsyncUdpSocketDelegate { var socket: GCDAsyncUdpSocket! func SetupAndSend() { let host = "127.0.0.1" // IP let port: UInt16 = 1234 // Port let message = messageOut.data(using: String.Encoding.utf8)! socket = GCDAsyncUdpSocket(delegate: self, delegateQueue: DispatchQueue.main) do { try socket.bindToPort(port) try socket.enableBroadcast(true) try socket.beginReceiving() socket.send(message, toHost: host, port: port, withTimeout: 2, tag: 0) } } // Delegate func udpSocket(_ sock: GCDAsyncUdpSocket, didNotConnect error: Error){ print("UDP Connection error: \(error)") } func udpSocket(_ sock: GCDAsyncUdpSocket, didReceive data: Data, fromAddress address: Data, withFilterContext filterContext: Any?) { var host: NSString? var port: UInt16 = 0 GCDAsyncUdpSocket.getHost(&host, port: &port, fromAddress: address) print(host) } }