create a udp client in swift

To create a UDP client in Swift, we need to use the GCDAsyncUdpSocket library. Here are the steps to create a UDP client:

Import the CocoaAsyncSocket framework in your Swift file.


main.swift
import CocoaAsyncSocket
24 chars
2 lines

Create an instance of GCDAsyncUdpSocket. Specify the delegate queue and delegate of the socket.


main.swift
let udpSocket = GCDAsyncUdpSocket(delegate: self, delegateQueue: DispatchQueue.main)
85 chars
2 lines

Set up the UDP socket by calling the bind method and passing in the port number you want to use.


main.swift
try udpSocket.bind(toPort: 1234)
try udpSocket.beginReceiving()
64 chars
3 lines

Send a UDP message using the send(_:toHost:port:withTimeout:tag:) method.


main.swift
let message = "Hello, UDP server!"
let host = "10.0.0.1"
let port: UInt16 = 5678
udpSocket.send(message.data(using: .utf8)!, toHost: host, port: port, withTimeout: -1, tag: 0)
176 chars
5 lines

Receive a UDP message by implementing the udpSocket(_:didReceive:fromAddress:withFilterContext:) method of the GCDAsyncUdpSocketDelegate protocol.


main.swift
func udpSocket(_ sock: GCDAsyncUdpSocket, didReceive data: Data, fromAddress address: Data, withFilterContext filterContext: Any?) {
    // Handle the received data
}
167 chars
4 lines

Here's the complete UDP client code in Swift:


main.swift
import CocoaAsyncSocket

class UdpClient: NSObject, GCDAsyncUdpSocketDelegate {
    
    var udpSocket: GCDAsyncUdpSocket!
    
    func setupConnection() {
        udpSocket = GCDAsyncUdpSocket(delegate: self, delegateQueue: DispatchQueue.main)
        
        do {
            try udpSocket.bind(toPort: 1234)
            try udpSocket.beginReceiving()
        } catch {
            print(error)
        }
    }
    
    func sendUdpMessage() {
        let message = "Hello, UDP server!"
        let host = "10.0.0.1"
        let port: UInt16 = 5678
        udpSocket.send(message.data(using: .utf8)!, toHost: host, port: port, withTimeout: -1, tag: 0)
    }
    
    func udpSocket(_ sock: GCDAsyncUdpSocket, didReceive data: Data, fromAddress address: Data, withFilterContext filterContext: Any?) {
        // Handle the received data
    }
    
}
853 chars
30 lines

similar swift code snippets

create a udp server on a specific port in swift

create a udp client in swift

send a binary message to a udp server in swift

create a udp client on a specific port in swift

send a binary json message to a udp server in swift

send a message to a udp server in swift

create a udp server in swift

send a binary json message to a tcp server in swift

send a binary message to a tcp server in swift

sort a list of people by name in swift

related categories