[Swift]たった40行のUIScrollViewを使ったシンプルなチュートリアル画面サンプル ref: http://qiita.com/osamu1203/items/a1a361f9ff00e93258e2

file0.swift

import UIKit

class ViewController: UIViewController, UIScrollViewDelegate {

    var scrollView: UIScrollView!
    var pageControll: UIPageControl!
    let pageNum = 4
    let pageColors:[Int:UIColor] = [1:UIColor.redColor(),2:UIColor.yellowColor(),3:UIColor.blueColor(),4:UIColor.greenColor()]

    override func viewDidLoad() {
        super.viewDidLoad()

        self.scrollView = UIScrollView(frame: self.view.bounds)
        self.scrollView.contentSize = CGSizeMake(self.view.bounds.width * CGFloat(pageNum), self.view.bounds.height)
        self.scrollView.pagingEnabled = true
        self.scrollView.showsHorizontalScrollIndicator = false
        self.scrollView.delegate = self;
        self.view.addSubview(self.scrollView)

        self.pageControll = UIPageControl(frame: CGRectMake(0, self.view.bounds.height-50, self.view.bounds.width, 50))
        self.pageControll.numberOfPages = pageNum
        self.pageControll.currentPage = 0
        self.view.addSubview(self.pageControll)

        for p in 1...pageNum {
            var v = UIView(frame: CGRectMake(self.view.bounds.width * CGFloat(p-1), 0, self.view.bounds.width, self.view.bounds.height))
            v.backgroundColor = self.pageColors[p]
            self.scrollView.addSubview(v)
        }
    }

    func scrollViewDidScroll(scrollView: UIScrollView) {
        var pageProgress = Double(scrollView.contentOffset.x / scrollView.bounds.width)
        self.pageControll.currentPage = Int(round(pageProgress))

    }
    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
    }
}