// init contact picker with custom desire subtitle
 
 func showContactPicker {
    
  let contactsVC = ASContactPicker(subTitle: .phone, multipleSelection: true, shouldOpenContactDetail: true)
  let nav = UINavigationController(rootViewController: contactsVC)
  self.present(nav, animated: true, completion: nil)
 
 
   // init handler for selected contacts
   contacts.didSelectContacts = { contacts in
       contacts.forEach { contact in debugPrint("\(contact.firstName) \(contact.lastName)") }
   }

   // init handler for single contact, in case you choosed single selection
   contacts.didSelectSingleContact = { contact in
       debugPrint("\(contact.firstName) \(contact.phones[0].digits)")
   }
}