UIBarButtonItems created programatically with Swift, not visible - swift

Question

I'm not sure why this piece of code which is supposed to embed two bar button items in a navigation controller's toolbar won't work. The toolbar itself is visible when I run my code, but not the bar button items. What am I doing wrong here? Thanks for attention.
class NavigationController: UINavigationController {
override func viewDidLoad() {
super.viewDidLoad()
//Tool bar appearance
toolbar.barTintColor = UIColor.blackColor()
//Show tool bar by default
self.navigationController?.toolbarHidden = false
//Icons all located in images.xcassets
let homeImage = UIImage(named: "home")
let gameImage = UIImage(named: "logo")
var toolBarItems = [UIBarButtonItem]()
let homeButton = UIBarButtonItem(image: homeImage, style: UIBarButtonItemStyle.Plain, target: self, action: #selector(NavigationController.toHome))
homeButton.title = "Home"
let gameButton = UIBarButtonItem(image: gameImage, style: UIBarButtonItemStyle.Plain, target: self, action: #selector(NavigationController.toGame))
homeButton.title = "Game"
//Place the bar items in toolBarItems array
toolBarItems.append(homeButton)
toolBarItems.append(gameButton)
//self.toolbar.items = toolBarItems
self.toolbar.setItems(toolBarItems, animated: true)
}//End viewDidLoad
func toHome() {
let homeVC = HomeViewController(nibName: "HomeViewController", bundle: nil)
self.pushViewController(homeVC, animated: true)
}
func toGame() {
let gameVC = GameViewController(nibName: "GameViewController", bundle: nil)
self.pushViewController(gameVC, animated: true)
}
}

Answer 1

Did you create a second .swift file for your dependent controller? You should move this code to the dependant controller file
self.navigationController?.toolbarHidden = false
let button1 = UIBarButtonItem(title: "home", style: .Plain, target: self, action: #selector(SecondViewController.home))
let myToolBar = [button1]
self.setToolbarItems(myToolBar, animated: true)

Answer 2

I am not sure but I think your buttons has size 0. So maybe you should add some constraints or view frame size. You can try debugging using the view hierarchy debugger.

Answer 3

Maybe you just have to replace this self.navigationController?.toolbarHidden = false
With this toolbarHidden = false
I'm confused by your code. Is the class you show us, the one Navigation Controller where all other ViewController depend on or is it itself one dependent ViewController that in this case appears to be a Navigation Controller? Or is it a Navigation Controller by mistake? (not very likely)
Why I ask? At one time you're referring to the parent navigation controller with self.navigationController?.toolbarHidden = false which is not this navigation controller itself. Then in the rest of the code, you refer to this controller itself.
Hope this leads to the right thinking.