// 1. Add the protocol PhoneNumberViewControllerDelegate
class ViewController: UIViewController,PhoneNumberViewControllerDelegate {


func presentPhoneNumberViewController { //Your function. Can be any name
   // 2. Create the PhoneNumberViewController
   let phoneNumberViewController = PhoneNumberViewController.standardController()

   // 3. Set the delegate
   phoneNumberViewController.delegate = self

   // 4. Present the PhoneNumberViewController (Navigation Controller)
   navigationController?.pushViewController(phoneNumberViewController, animated: true)
}