title: Swift/iOS8: Why are Page Control indicators not showing?
body: <p>I am implementing a straightforward gallery view controller where the app displays a small range of full-screen images that the user can scroll through. I'm using UIPageViewController which I thought, should display the Page Control indicators automatically if I implement the correct datasource functions. However I still cannot see any indicators. </p>
  
  <p>In my main <code>GalleryViewController</code>:</p>
  
  <pre><code>class GalleryViewController: UIViewController, UIPageViewControllerDataSource, UIPageViewControllerDelegate {
  
  var pageController: UIPageViewController?
  var pageContent = NSArray()
  
  override func viewDidLoad() {
  super.viewDidLoad()
  .... some code to load images into the pageContent array ....
  
  pageController = UIPageViewController(transitionStyle:.Scroll, navigationOrientation:.Horizontal,options:nil) 
  pageController?.delegate = self
  pageController?.dataSource = self
  
  ... some more standard code to add the page controller to self.view etc.
  
  var pageControl = UIPageControl.appearance()
  pageControl.pageIndicatorTintColor = UIColor.lightGray()
  pageControl.currentPageIndicatorTintColor = UIColor.whiteColor()
  pageControl.backgroundColor = UIColor.blackColor()
  
  pageController!.didMoveToParentViewController(self)
  }
  
  func viewControllerAtIndex(index:Int) -&gt; ContentViewController? {
  ....
  }
  </code></pre>
  
  <p>I have implemented the two compulsory protocol methods viewControllerBeforeViewController and viewControllerAfterController as well as the two required ones for paging, presentationCountForPagesViewController and presentationIndexForPageViewController. </p>
  
  <p>My <code>ContentViewController</code> has a <code>UIImageView</code> that fills the entire screen. However even when I decrease its size off the bottom of the screen, I cannot see any page indicator lights. 
  Have I missed something here? Let me know if I have not provided enough information. I've been trying to rewrite an old app of mine that I coded in Objective-C over 5 years ago - entirely in Swift for iOS8 and Xcode etc. has changed so much, it is confusing.
  Thanks!</p>