In Swift: The view isn't dismissed when button clicked

[hadth]

Hi, I don't know if you're still working on this extension but I hope you'll have a look at my problem:
I used this code:

var alert = NSAlert()
                    alert.alertStyle = .WarningAlertStyle
                    alert.messageText = "Error!"
                    alert.runAsPopoverForView(tfInput, withCompletionBlock: {
                        (result : Int) in
                            println("Result: \(result)")
                        }
                        )

tfInput is a NSTextField inside a NSWindow. When I clicked the OK button, the alert view isn't dismissed and the program doesn't jump into the completion block.

[Abushawish]

@hadth I know your question is veryyyyyyy old, but just incase anyone needs to use this. Alongside what you have already, add the actual buttons. Don't rely on the provided button. Do this as so:

alert.addButton(withTitle: "OK")
alert.addButton(withTitle: "Cancel")

P.S. In Swift 4, I had to do this for the alert style:

alert.alertStyle = .warning