UINavigationController rightbutton disappears - ios

Question

I am trying to add Home button to navigation controller. Therefore I created below class and sub classed my navigation controller. My button appears on my first view. When I navigate to other view(table view in my picture), added button disappears. I am using segues to push to another view.
class ThemedNavigationController: UINavigationController {
override func viewDidLoad() {
super.viewDidLoad()
var home = UIBarButtonItem(image: UIImage(named: "home"), style: UIBarButtonItemStyle.Plain, target: self, action: "doneAction")
navigationBar.topItem?.rightBarButtonItem = home
navigationBar.barTintColor = anaRenk
navigationBar.barStyle = .Black
navigationBar.titleTextAttributes = [NSFontAttributeName: UIFont(name: sansSerifName, size: 17)!]
UIBarButtonItem.appearance().setTitleTextAttributes(
[NSFontAttributeName: UIFont(name: sansSerifName, size: 17)!],
forState: .Normal)
}
func doneAction() { // [6]
self.navigationController?.popToRootViewControllerAnimated(true)
}
}
Before my mainViewController didn't have navigation controller. Instead each button was pushing new viewcontrollers which had separate navigation controllers and my code was working. I will appreciate if you can tell me how can I fix this issue.

Answer 1

You have to add the buttons in each controller as the nav bar updates for each controller when pushed on. hence why the back button label changes.
So put the same code in each controller you want a home button for.
I would not put any of the code in the Nav controller itself. Start with the first controller you want to pop home from.
Easier to drag a bar button item in using storyboard, then create an action for it which pops to root.

Answer 2

I think I made it. It works however I am not sure if it is the best method. I will appreciate if you comment for any possible memory leak or crash issue. Thanks.
class ThemedNavigationController: UINavigationController {
required init(coder aDecoder: NSCoder) {
super.init(coder: aDecoder)
}
var home:UIBarButtonItem!
override func viewDidLoad() {
super.viewDidLoad()
home = UIBarButtonItem(image: UIImage(named: "home"), style: UIBarButtonItemStyle.Plain, target: self, action: "doneAction")
navigationBar.barTintColor = anaRenk
navigationBar.barStyle = .Black
navigationBar.titleTextAttributes = [NSFontAttributeName: UIFont(name: sansSerifName, size: 17)!]
UIBarButtonItem.appearance().setTitleTextAttributes(
[NSFontAttributeName: UIFont(name: sansSerifName, size: 17)!],
forState: .Normal)
}
override func pushViewController(viewController: UIViewController, animated: Bool) {
var exbutton = viewController.navigationItem.rightBarButtonItem?
if exbutton == nil {
viewController.navigationItem.rightBarButtonItem = home
}
else {
viewController.navigationItem.rightBarButtonItems?.insert(home, atIndex: 0)
}
super.pushViewController(viewController, animated:animated)
}
func doneAction() { // [6]
popToRootViewControllerAnimated(true)
}
}