UDPClient.swift

//
//  UDPClient.swift
//

import Network
import Foundation

protocol UDPListener {
    func handleResponse(_ client: UDPClient, data: Data)
}

class UDPClient {
    
    var connection: NWConnection
    var address: NWEndpoint.Host
    var port: NWEndpoint.Port
    var delegate: UDPListener?
    
    var resultHandler = NWConnection.SendCompletion.contentProcessed { NWError in
        guard NWError == nil else {
            print("ERROR! Error when data (Type: Data) sending. NWError: \n \(NWError!)")
            return
        }
    }

    init?(address newAddress: String, port newPort: Int32) {
        guard let codedAddress = IPv4Address(newAddress),
            let codedPort = NWEndpoint.Port(rawValue: NWEndpoint.Port.RawValue(newPort)) else {
                print("Failed to create connection address")
                return nil
        }
        address = .ipv4(codedAddress)
        port = codedPort
        
        connection = NWConnection(host: address, port: port, using: .udp)
        connection.stateUpdateHandler = { newState in
            switch (newState) {
            case .ready:
                print("State: Ready")
                return
            case .setup:
                print("State: Setup")
            case .cancelled:
                print("State: Cancelled")
            case .preparing:
                print("State: Preparing")
            default:
                print("ERROR! State not defined!\n")
            }
        }
        connection.start(queue: .global())
    }
    
    deinit {
        connection.cancel()
    }
    
    func send(_ data: Data) {
        self.connection.send(content: data, completion: self.resultHandler)
        self.connection.receiveMessage { data, context, isComplete, error in
            guard let data = data else {
                print("Error: Received nil Data")
                return
            }
            guard self.delegate != nil else {
                print("Error: UDPClient response handler is nil")
                return
            }
            self.delegate?.handleResponse(self, data: data)
        }
    }
}

UDPClientInit.swift

class UDPMessageReader: UDPListener {
  
  var commandClient = UDPClient(address: IPAddress, port: CommandPort)
  
  init() {
    commandClient.delegate = self
  }
  
  func handleResponse(_ client: UDPClient, data: Data) {
    // Do Something
  }
}

You probably need to import the network framework made by apple to playgrounds, have you tried that?

…

On Sat, Dec 24, 2022 at 12:56 AM nkmakerin ***@***.***> wrote: ***@***.**** commented on this gist. ------------------------------ Hii Michael, I am using IPad Pro with swiftplayground app.. I do not have access to MacBook n Xcode.. Can you please share some snippet about how to encapsulate udp sender receiver class you hv made in to swiftplayground app on iPad to make use of it.. I hv just migrated to Apple echo system and want to communicate with Tello drone via udp using swiftplayground app on ipad Marry Christmas in advance.. Cheers nkmaker — Reply to this email directly, view it on GitHub <https://gist.github.com/8d3171fbef897c9af8db7b7491d97601#gistcomment-4412413> or unsubscribe <https://github.com/notifications/unsubscribe-auth/AGEF4OFJ2TDPMYOT3SX4UDDWO2GB7BFKMF2HI4TJMJ2XIZLTSKBKK5TBNR2WLJDHNFZXJJDOMFWWLK3UNBZGKYLEL52HS4DFQKSXMYLMOVS2I5DSOVS2I3TBNVS3W5DIOJSWCZC7OBQXE5DJMNUXAYLOORPWCY3UNF3GS5DZVRZXKYTKMVRXIX3UPFYGLK2HNFZXIQ3PNVWWK3TUUZ2G64DJMNZZDAVEOR4XAZNEM5UXG5FFOZQWY5LFVEYTAMZVGQYTQMZVU52HE2LHM5SXFJTDOJSWC5DF> . You are receiving this email because you authored the thread. Triage notifications on the go with GitHub Mobile for iOS <https://apps.apple.com/app/apple-store/id1477376905?ct=notification-email&mt=8&pt=524675> or Android <https://play.google.com/store/apps/details?id=com.github.android&referrer=utm_campaign%3Dnotification-email%26utm_medium%3Demail%26utm_source%3Dgithub> .