didReceiveData 从未被调用 - 我编写了这个由我的主线 UIViewController 调用的 swift 类,以向接收到它的服务器发送一条消息 OK,但是当服务器发回响应,客户端从未收到它,因为 didReceiveData() 从未被触发。
我一直在谷歌上搜索并查看文档,它说客户端不需要绑定(bind)(只有服务器需要这样做)任何人都可以帮助我 - 在此先感谢。
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
}
}
最佳答案
为什么在发送后关闭套接字?它适用于绑定(bind)。
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)
}
}
关于ios - 我正在寻找有关 GCDAsyncUdpSocket 的一些示例,但没有找到有效的示例,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/42547555/