How to use NetworkReachabilityManager in Alamofire

//http://stackoverflow.com/questions/35427698/how-to-use-networkreachabilitymanager-in-alamofire

import UIKit
import Alamofire

class ViewController: UIViewController {

    override func viewDidLoad() {
        super.viewDidLoad()

        let net = NetworkReachabilityManager()
        net?.startListening()
        net?.listener = {status in
            if net?.isReachable ?? false {
                if ((net?.isReachableOnEthernetOrWiFi) != nil) {
                    print("Whether the network is currently reachable over Ethernet or WiFi interface.")
                } else if(net?.isReachableOnWWAN)! {
                    print("Whether the network is currently reachable over the WWAN interface.")
                }
            } else {
                print("No connection.")
            }

        }
    }


}

// ------

import UIKit
import Alamofire

class ViewController: UIViewController {

    @IBOutlet weak var label1: UILabel!

    @IBOutlet weak var label2: UILabel!

    override func viewDidLoad() {
        super.viewDidLoad()

        let net = NetworkReachabilityManager()
        net?.startListening()
        net?.listener = {status in
            if net?.isReachable ?? false {
                if ((net?.isReachableOnEthernetOrWiFi) != nil) {
                    print("Whether the network is currently reachable over Ethernet or WiFi interface.")
                    self.label1.text = "Whether the network is currently reachable over Ethernet or WiFi interface."
                } else if(net?.isReachableOnWWAN)! {
                    print("Whether the network is currently reachable over the WWAN interface.")
                    self.label1.text = "Whether the network is currently reachable over the WWAN interface."
                }
            } else {
                print("No connection.")
                self.label1.text = "No connection."
            }
            switch status {
            case .unknown:
                print("unknown")
                self.label2.text = "unknown"
                break
            case .notReachable:
                print("notReachable")
                self.label2.text = "notReachable"
                break
            case .reachable(.ethernetOrWiFi):
                print("ethernetOrWiFi")
                self.label2.text = "ethernetOrWiFi"
                break
            case .reachable(.wwan):
                print("wwan")
                self.label2.text = "wwan"
                break
            }

        }
    }


}