How to add title/button to a UINavigationController added inside a UIViewController? - ios

Question

For some reason, I have to add a UINavagationController() inside a UIViewController(), so I did the following in the view controller class:
class someViewController: UIViewController {
private let myNav = UINavigationController()
override func viewDidLoad() {
self.addChildViewController(myNav)
self.view.addSubview(myNav.view)
myNav.view.translatesAutoresizingMaskIntoConstraints = false
myNav.view.topAnchor.constraintEqualToAnchor(self.topLayoutGuide.bottomAnchor).active = true
myNav.view.leftAnchor.constraintEqualToAnchor(view.leftAnchor).active = true
myNav.view.rightAnchor.constraintEqualToAnchor(view.rightAnchor).active = true
myNav.view.heightAnchor.constraintEqualToAnchor(nil, constant: 44).active = true
myNav.didMoveToParentViewController(self)
}
}
The navigation controller is added & showing up correctly. Then I try to add a title (or Done button) to the navigation bar, however the items just don't show up. I tried a few things like this:
self.navigationItem.title = "some title"
myNav.navigationItem.title = "some title"
myNav.navigationItem.rightBarButtonItem = btnDone
What's the right way to do it in this case?

Answer 1

Why don't you use this simple code to add a navigation bar :
let navigationBar = UINavigationBar(frame: CGRectMake(0, 0, self.view.frame.size.width, 66)) // Offset by 20 pixels vertically to take the status bar into account
// Create a navigation item with a title
let navigationItem = UINavigationItem()
navigationItem.title = "Title"
// Create left and right button for navigation item
let leftButton = UIBarButtonItem(title: "Save", style: UIBarButtonItemStyle.Plain, target: self, action: "btn_clicked:")
let rightButton = UIBarButtonItem(title: "Right", style: UIBarButtonItemStyle.Plain, target: self, action: nil)
// Create two buttons for the navigation item
navigationItem.leftBarButtonItem = leftButton
navigationItem.rightBarButtonItem = rightButton
// Assign the navigation item to the navigation bar
navigationBar.items = [navigationItem]
// Make the navigation bar a subview of the current view controller
self.view.addSubview(navigationBar)