Unrecognized Selector Swift

override func loadView() {
    super.loadView()
    self.view.backgroundColor = UIColor.purpleColor()

    // Initialize segmented view
    let items = ["Purple", "Green", "Blue"]
    let customSC = UISegmentedControl(items: items)
    customSC.selectedSegmentIndex = 0

    // Set up the frame and segmented control
    let frame = UIScreen.mainScreen().bounds
    customSC.frame = CGRectMake(frame.minX + 10, frame.minY + 50, frame.width - 20, frame.height * 0.1)

    // Syling the controller ( not necessary)
    customSC.layer.cornerRadius = 5.0 // removes background bleed
    customSC.backgroundColor = UIColor.blackColor()
    customSC.tintColor = UIColor.whiteColor()

    // Add Target
    customSC.addTarget(self, action: "changeColor", forControlEvents: .ValueChanged)

    self.view.addSubview(customSC)

}

func changeColor(sender: UISegmentedControl) {
    switch sender.selectedSegmentIndex {
    case 1:
        self.view.backgroundColor = UIColor.greenColor()
    case 2:
        self.view.backgroundColor = UIColor.blueColor()
    default:
        self.view.backgroundColor = UIColor.purpleColor()
    }
}

override func viewDidLoad() {
    super.viewDidLoad()
    // Do any additional setup after loading the view, typically from a nib.
}



override func didReceiveMemoryWarning() {
    super.didReceiveMemoryWarning()
    // Dispose of any resources that can be recreated.
}