Swift - UITapGestureRecognizer UIPageViewController - ios

Question

Okay, I've created a pageview slider app. Everything works great, but now I'd like to be able to hide/unhide my navbar with a single tap using UITapGestureRecognizer.
I have been able to hide the navbar on viewDidLoad, but I am not sure where to call my singleTapped function, or how to implement UITapGestureRecognizer.
How can I hide/unhide the UIPageViewController navbar with UITapGestureRecognizer?
New to swift/ios
my code
class ViewController: UIViewController, UIPageViewControllerDataSource {
var pageViewController: UIPageViewController!
private var allPages = [Page]()
var pages = NSMutableOrderedSet()
override func viewDidLoad() {
super.viewDidLoad()
###Hide NavBar
self.navigationController?.navigationBarHidden = true
self.pageViewController = self.storyboard?.instantiateViewControllerWithIdentifier("PageViewController") as! UIPageViewController
self.pageViewController.dataSource = self
var startVC = self.viewControllerAtIndex(0) as ContentViewController
var viewControllers = NSArray(object: startVC)
self.pageViewController.setViewControllers(viewControllers as [AnyObject], direction: .Forward, animated: true, completion: nil)
self.pageViewController.view.frame = CGRectMake(0, 30, self.view.frame.width, self.view.frame.size.height)
self.addChildViewController(self.pageViewController)
self.view.addSubview(self.pageViewController.view)
self.pageViewController.didMoveToParentViewController(self)
}
###Function to Hide/Unhide Navbar
func singleTapped(recognizer: UITapGestureRecognizer) {
if (self.navigationController?.navigationBarHidden == false) {
###hide the Navigation Bar
self.navigationController?.setNavigationBarHidden(true, animated: true)
}
###if Navigation Bar is already hidden
else if (self.navigationController?.navigationBarHidden == true)
{
###Show the Navigation Bar
self.navigationController?.setNavigationBarHidden(false, animated: true)
}
}
func pageViewController(pageViewController: UIPageViewController, viewControllerBeforeViewController viewController: UIViewController) -> UIViewController? {
var vc = viewController as! ContentViewController
var index = vc.pageIndex as Int
if (index == 0 || index == NSNotFound) {
return nil
}
index--
return self.viewControllerAtIndex(index)
}
func pageViewController(pageViewController: UIPageViewController, viewControllerAfterViewController viewController: UIViewController) -> UIViewController? {
var vc = viewController as! ContentViewController
var index = vc.pageIndex as Int
if (index == NSNotFound) {
return nil
}
index++
if (index == self.pages.count) {
return nil
}
return self.viewControllerAtIndex(index)
}
func viewControllerAtIndex(index: Int) -> ContentViewController
{
if ((self.pages.count == 0) || (index >= self.pages.count)) {
return ContentViewController()
}
var vc: ContentViewController = self.storyboard?.instantiateViewControllerWithIdentifier("ContentViewController") as! ContentViewController
###Store image in imageFile
var image = (pages.objectAtIndex(index) as! Page).image
vc.imageFile = image
vc.pageIndex = index
return vc
}
func presentationCountForPageViewController(pageViewController: UIPageViewController) -> Int
{
return self.pages.count
}
func presentationIndexForPageViewController(pageViewController: UIPageViewController) -> Int
{
return 0
}
}

Answer 1

Use UITapGestureRecognizer:
In viewDidLoad function add
self.view.addGestureRecognizer(UITapGestureRecognizer(target: self, action:"singleTapped:"))