title: @IBAction crashes app in Swift
body: <p>I have button and method</p>
  
  <pre><code> switchViewButton = UIButton.buttonWithType(.System) as? UIButton
      switchViewButton!.frame = CGRectMake(15, 25, 50, 50)
      switchViewButton!.setTitle("sss", forState: .Normal)
      switchViewButton!.addTarget(self, action: "switchViewFunc", forControlEvents: .TouchUpInside)
      switchViewButton!.backgroundColor = UIColor.redColor()
      switchViewButton!.layer.cornerRadius = 25
      topView.addSubview(switchViewButton)
  
  
  @IBAction func switchViewFunc(sender : AnyObject){
       println("Button was clicked", sender)}
  </code></pre>
  
  <p>This method crashes app with reason "unrecognized selector sent to instance"</p>
  
  <p>I have another button and method just like this, and it's work perfect. If I'm delete <code>(sender : AnyObject)</code> it works. I cann't understand what is wrong</p>