AlamoFire NetworkReachabilityManager Test For Device Running 10.3.1

MasterViewController.swift

import Alamofire
import UIKit

class MasterViewController: UITableViewController {

    @IBOutlet weak var titleImageView: UIImageView!

    var detailViewController: DetailViewController? = nil
    var objects = NSMutableArray()
    var networkReachabilityManager = Alamofire.NetworkReachabilityManager(host: "www.apple.com")
    var onlineStatus: Bool = false
    var timer: Timer!
    
    // MARK: - View Lifecycle

    override func awakeFromNib() {
        super.awakeFromNib()

        navigationItem.titleView = titleImageView
    }

    override func viewDidLoad() {
        super.viewDidLoad()

        if let split = splitViewController {
            let controllers = split.viewControllers

            if
                let navigationController = controllers.last as? UINavigationController,
                let topViewController = navigationController.topViewController as? DetailViewController
            {
                detailViewController = topViewController
            }
        }
        
        setupReachabilityManager()
        startNetworkTimer()
    }
    
    override public func viewWillDisappear(_ animated: Bool) {
        super.viewWillDisappear(animated)
        stopNetworkTimer()
    }
    
    // MARK: - Instance Methods
    func setupReachabilityManager() {
        networkReachabilityManager?.listener = { [unowned self] status in
            switch status {
            case .notReachable:
                self.onlineStatus = false
                
            case .reachable(_), .unknown:
                self.onlineStatus = true
            }
        }
        
        networkReachabilityManager?.startListening()
    }
    
    func startNetworkTimer() {

        timer = Timer.scheduledTimer(timeInterval: 1.0,
                                            target: self,
                                            selector: #selector(networkTimerCallback),
                                            userInfo: nil,
                                            repeats: true)
    }
    
    func stopNetworkTimer() {
        timer.invalidate()
    }
    
    @objc public final func networkTimerCallback() {
        print("Online Status: \(self.onlineStatus)")
    }

    // MARK: - UIStoryboardSegue

    override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
        if
            let navigationController = segue.destination as? UINavigationController,
            let detailViewController = navigationController.topViewController as? DetailViewController
        {
            func requestForSegue(_ segue: UIStoryboardSegue) -> Request? {
                switch segue.identifier! {
                case "GET":
                    detailViewController.segueIdentifier = "GET"
                    return Alamofire.request("https://httpbin.org/get")
                case "POST":
                    detailViewController.segueIdentifier = "POST"
                    return Alamofire.request("https://httpbin.org/post", method: .post)
                case "PUT":
                    detailViewController.segueIdentifier = "PUT"
                    return Alamofire.request("https://httpbin.org/put", method: .put)
                case "DELETE":
                    detailViewController.segueIdentifier = "DELETE"
                    return Alamofire.request("https://httpbin.org/delete", method: .delete)
                case "DOWNLOAD":
                    detailViewController.segueIdentifier = "DOWNLOAD"
                    let destination = DownloadRequest.suggestedDownloadDestination(
                        for: .cachesDirectory,
                        in: .userDomainMask
                    )
                    return Alamofire.download("https://httpbin.org/stream/1", to: destination)
                default:
                    return nil
                }
            }

            if let request = requestForSegue(segue) {
                detailViewController.request = request
            }
        }
    }
}