scrollview.swift

class ScrollViewController: UIViewController, UIScrollViewDelegate {
    var scrollView: UIScrollView!
    var imageView: UIImageView!
    var pageControl: UIPageControl!

    override func viewDidLoad() {
        super.viewDidLoad()
        
        scrollView = UIScrollView(frame: view.bounds)
        
        let contentWidth = scrollView.bounds.width
        let contentHeight = scrollView.bounds.height * 3
        scrollView.contentSize = CGSizeMake(contentWidth, contentHeight)
        
        view.addSubview(scrollView)
        
        let pageWidth = scrollView.bounds.width
        let pageHeight = scrollView.bounds.height
        
        scrollView.contentSize = CGSizeMake(3*pageWidth, pageHeight)
        scrollView.pagingEnabled = true
        scrollView.showsHorizontalScrollIndicator = false
        
        let view1 = UIView(frame: CGRectMake(0, 0, pageWidth, pageHeight))
        view1.backgroundColor = UIColor.blueColor()
        let view2 = UIView(frame: CGRectMake(pageWidth, 0, pageWidth, pageHeight))
        view2.backgroundColor = UIColor.orangeColor()
        let view3 = UIView(frame: CGRectMake(2*pageWidth, 0, pageWidth, pageHeight))
        view3.backgroundColor = UIColor.purpleColor()
        
        scrollView.addSubview(view1)
        scrollView.addSubview(view2)
        scrollView.addSubview(view3)
        
        scrollView.delegate = self
    }
...
}