import UIKit


class ViewController: UIViewController {


    override func viewDidLoad() {
        super.viewDidLoad()

        activateProximitySensor()


    }

    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
        // Dispose of any resources that can be recreated.
    }

    func proximityChanged(notification: NSNotification) {
        if let device = notification.object as? UIDevice {
            print("\(device) detected!")
        }
    }


    func activateProximitySensor() {
        let device = UIDevice.current
        device.isProximityMonitoringEnabled = true
        if device.isProximityMonitoringEnabled {
            NotificationCenter.default.addObserver(self, selector: #selector(ViewController.proximityChanged), name: NSNotification.Name(rawValue: "ProximitySensorDidChangeNotification"), object: device)
        }
    }


}