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I'm having trouble getting my images to scale to different size devices. Using page control I am trying to create something like a horizontal scrolling photo album. I'm pretty certain I'm not setting the width and height right for my UIScrollView because the images and will only come out to the width and height of UIscrollView in my storyboard. The UIscrollView has no constraints in the storyboard because it needs dynamic and conform to the number of images.

This is an example of how it should look on all devices. This is on the iPhone 8 Plus

This is what happens on the iPad 12.9 inch. The concern is the image not going the full width of the screen and scaling the height and the page control dots which need to be in the center

Here is the code I have for what I am trying to do:

 @IBOutlet weak var imageScrollView: UIScrollView!
 @IBOutlet weak var pageControl: UIPageControl!

 // Create array to hold images and frame for the images
 var buildingImages: [String] = 
 var frame = CGRect(x: 0, y: 0, width: 0, height: 0)

 // Get index for the number of pages for page control

 pageControl.numberOfPages=buildingImages.count
 for index in 0..<buildingImages.count

 let xPosition=self.view.frame.width * CGFloat(index)
 frame.origin.x=xPosition

 frame.size=imageScrollView.frame.size

 // Initialize an image view and set it to an image, add image on top of scroll view
 let buildingImageView=UIImageView(frame: frame)
 buildingImageView.image=UIImage(named: buildingImages[index])

 buildingImageView.pin_setImage(from: URL(string: buildingImages[index]))

 self.imageScrollView.addSubview(buildingImageView)
 
 /*
 Set up content size of scroll view (get size of scroll view by
 the amount of images in the scroll view
 */

 imageScrollView.contentSize=CGSize(width: (imageScrollView.frame.size.width*CGFloat(buildingImages.count)), height: imageScrollView.frame.size.height)
 imageScrollView.delegate=self

 func scrollViewDidEndDecelerating(_ scrollView: UIScrollView) 
 var pageNumber = scrollView.contentOffset.x/scrollView.frame.size.width
 pageControl.currentPage=Int(pageNumber)