Navigation bar in appended view controllers - ios

Question

I currently have three view controllers appended to one single view controller called V1. V1 has a horizontal scrollview which can push the other three views on the screen when scrolled.
I would like to embed a Navigation Bar in each of the three view controllers so that each one can have its own independent bar buttons and titles based on which page is scrolled to.
My problem is determining where I embed the navigation bar. I tried V1 but it is not giving the results I would like. How can I make each view have its own navigation bar?
class ViewController: UIViewController {
#IBOutlet var scrollView: UIScrollView!
override func viewDidLoad() {
super.viewDidLoad()
//Changes Navi bar
// navigationController!.navigationBar.barTintColor = UIColor(red: 237/255, green: 15/255, blue: 140/255, alpha: 1)
// navigationController!.navigationBar.barStyle = UIBarStyle.Black
// Do any additional setup after loading the view, typically from a nib.
let v1 = storyboard!.instantiateViewControllerWithIdentifier("A") as! Offers
let v2 : View2 = View2(nibName: "View2", bundle: nil)
let v3 = storyboard!.instantiateViewControllerWithIdentifier("C") as! DiscoveryPage
self.addChildViewController(v1)
self.scrollView.addSubview(v1.view)
v1.didMoveToParentViewController(self)
self.addChildViewController(v2)
self.scrollView.addSubview(v2.view)
v2.didMoveToParentViewController(self)
self.addChildViewController(v3)
self.scrollView.addSubview(v3.view)
v3.didMoveToParentViewController(self)
//Set the frame
var v2Frame : CGRect = v2.view.frame
v2Frame.origin.x = self.view.frame.width
v2.view.frame = v2Frame
var v3Frame : CGRect = v3.view.frame
v3Frame.origin.x = self.view.frame.width * 2
v3.view.frame = v3Frame
self.scrollView.contentSize = CGSizeMake(self.view.frame.width * 3, self.view.frame.height)
}
}

Answer 1

A little explanation here, hope it'll answer your question.
If you're using a UINavigationController to manage your flow of view controllers. Then you don't need to provide custom navigation bar for every view controller, the top left and right bar button item and title of the view controller are part of UINavigationItem and UINavigationItem is a property of UIViewController.
Every time you push a view controller onto a UINavigationController, the navigation controller takes the navigation item from view controller and setup its item onto the navigation bar. The navigation bar is managed by UINavigationController automatically.
You just need to edit and provide your navigation related info in the associated UINavigationItem.
In the storyboard, if you don't see a navigation item associated to a view controller, you can drag an item from objects and drop it inside view controller:
If you click on a navigation item, you can edit these three option from property inspector:
If you drag a UIBarButtonItem from objects to your UINavigationItem associated to your UIViewController, it'll automatically add it to your left bar button.