title: UIAlertView not returning appropriate value
body: <p>Here is my code </p>
  
  <pre><code>import Foundation
  import UIKit
  
  class Alert: UIViewController {
  
  
  class func showAlert(title: String, message: String, buttonTitle: String? = nil, buttonTitle2: String? = nil, sender: UIViewController) -&gt; Int? {
      var flag : Int?
      func yes(){
          flag = 1
  
      }
      func no(){
          flag = 0
  
      }
       //= nil  ;
      if objc_getClass("UIAlertController") != nil {
          let alert = UIAlertController(title: title, message: message, preferredStyle: UIAlertControllerStyle.Alert)
          if (buttonTitle != nil){
              alert.addAction(UIAlertAction(title: buttonTitle, style: UIAlertActionStyle.Default, handler: { (action: UIAlertAction!) in
              yes()
  
  
          }))
          }
          if (buttonTitle2 != nil)  {
              alert.addAction(UIAlertAction(title: buttonTitle2, style: UIAlertActionStyle.Default, handler: { (action: UIAlertAction!) in
                  no()
  
              }))
          }
  
  
          sender.presentViewController(alert, animated: true, completion: nil)
  
         return flag
  
  
      } else {
          let alert = UIAlertView()
          alert.title = title
          alert.message = message
          alert.addButtonWithTitle(buttonTitle)
          alert.addButtonWithTitle(buttonTitle2)
          print("inside Else")
  
          alert.show()
          return flag
          //make and use a UIAlertView
      }
  
  }
  
  
  }
  </code></pre>
  
  <p>The problem is that the flag getting returned is always nil to the view controller I call Alert from. I need the flag to return 1 if "yes" is pressed and 0 if "No" is pressed. I have been stuck in this problem for lot of time. Help.</p>