Override back button in navigation stack while keeping appearance of default back button?

Question

How do I override the back button for just one view (not for all the back buttons present in different views) such that on click of the back button, root view controller is

Answer 1

I had the similar problem and I successfully used the answer given by Sarasranglt. Here is the SWIFT version.

    override func viewDidLoad() {
       let transparentButton = UIButton()
       transparentButton.frame = CGRectMake(0, 0, 50, 40)
       transparentButton.backgroundColor = UIColor.orangeColor()
       transparentButton.addTarget(self, action:"backAction:", forControlEvents:.TouchUpInside)
       self.navigationController?.navigationBar.addSubview(transparentButton)
    }

And the function is

 func backAction(sender:UIButton) {
     // Some sction
 }