Quickies for UIKit

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General

• Instantiate a new view controller from a storyboard [permalink]
  

          let detailVC = self.storyboard?.instantiateViewController(withIdentifier: "PlaylistDetailsViewController") 
              as! PlaylistDetailsViewController
          detailVC.playlist = playlist
          
          self.present(detailVC, animated: true, completion: nil)
  

Swift

• Using UIAlertController [permalink]
  Here's some moving parts for UIAlertController and friends, also does the username/password alert jazz.

  func showLoginPanel() {
      let alertTitle = "Please enter your Equifax username and password"
      let message = "We will only use this information for good, not evil."
      let alertController = UIAlertController.init(title: alertTitle,
                                                   message: message,
                                                   preferredStyle: .alert)
      alertController.addTextField { textfield in
          textfield.placeholder = "Equifax Username"
      }
      
      alertController.addTextField { textfield in
          textfield.placeholder = "Password"
          textfield.isSecureTextEntry = true
      }
      
      let stopAction = UIAlertAction(title: "Login",
                                     style: .default) 
      { action in
          guard let login = alertController.textFields?.first,
              let password = alertController.textFields?.last else {
                  print("This is wholly unexpected")
                  return
          }
  
          print("Do things with: (login.text!)")
      }
      alertController.addAction(stopAction)
      
      let cancelAction = UIAlertAction(title: "Cancel",
                                       style: .cancel,
                                       handler: nil)
      alertController.addAction(cancelAction)
  
      present(alertController, animated: true)
  }
  

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