UIAlertController in Swift

AlertController

// ios8 and later
var alert = UIAlertController(title: "Hey!",
    message: "How 'bout dat?",
    preferredStyle: .Alert)
            
let textConfigClosure: ((UITextField!) -> Void)! = { text in
    text.placeholder = "Type something here"
}
alert.addTextFieldWithConfigurationHandler(textConfigClosure)
        
alert.addTextFieldWithConfigurationHandler({textfield in
    textfield.placeholder = "foo"
})
            
alert.addAction(UIAlertAction(title: "Confirm", style: .Default, handler: {action in
    println("confirm was tapped")
    }))
            
let otherClosure: ((UIAlertAction!) -> Void)! = { action in
    println("other was tapped")
    let tf = alert.textFields[0] as UITextField
    println(tf.text)
}
alert.addAction(UIAlertAction(title: "Other", style: .Default, handler: otherClosure))
            
self.presentViewController(alert, animated:true, completion:nil)