How to use UIBarButtonSystemItem to change UIBarButtonItem identifier? (Swift)

Question

I want to change the identifier of an UIBarButtonItem with codes from \"Play\" to \"Pause\". How can I do that?

Thanks

Answer 1

This code is tested and working with Swift 2

@IBOutlet weak var navigationBar: UINavigationBar!

//playToPause()
@IBAction func playButton(sender: UIBarButtonItem) {

    let newBarButton = UIBarButtonItem(barButtonSystemItem: UIBarButtonSystemItem.Pause, target: self, action: "pauseButton:")
    navigationBar.topItem?.rightBarButtonItem = newBarButton
}

// pauseToPlay()
@IBAction func pauseButton(sender: UIBarButtonItem){

    let pauseBtnItem = UIBarButtonItem(barButtonSystemItem: UIBarButtonSystemItem.Play, target: self, action: "playButton:")
    navigationBar.topItem!.rightBarButtonItem = pauseBtnItem
}