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
  }
}

👍🏻

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

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> .