Swift uses CollectionView to achieve the ad bar sliding effect

//cell reuse the identifierprivate let reuseIdentifier = "reuseIdentifier"
class PlayCollectionViewController: UICollectionViewController {

 //Number of pages private let pageCount = 6
 //Layout object (custom layout) private var layout: UICollectionViewFlowLayout = PlayLayout()

 init() {
  (collectionViewLayout: layout)
 }

 required init?(coder aDecoder: NSCoder) {
  fatalError("init(coder:) has not been implemented")
 }

 override func viewDidLoad() {
  ()

  //Register cell  collectionView?.registerClass(, forCellWithReuseIdentifier: reuseIdentifier)
 }

 //MARK: - UICollectionDataSource
 override func collectionView(collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
  return pageCount
 }

 override func collectionView(collectionView: UICollectionView, cellForItemAtIndexPath indexPath: NSIndexPath) -> UICollectionViewCell {

  let cell = (reuseIdentifier, forIndexPath: indexPath) as! NewfearureCell
   = 
  return cell
 }
}

//MARK: - Here we still customize collectionViewCell in (in the file)class NewfearureCell: UICollectionViewCell {

 //Save the image index private var imageIndex:Int? {
  didSet {
   //Create the image name according to the page number (the name of each image is only different with the most and most number)    = UIImage(named: "image_\(imageIndex!)")
  }
 }

 override init(frame: CGRect) {
  (frame: frame)

  //Initialize the UI  setupUI()
 }
 required init?(coder aDecoder: NSCoder) {
  fatalError("init(coder:) has not been implemented")
 }

 private func setupUI() {

  //Add child control to contentView  (iconView)
  //Layout subcontrol position (filling screen)  iconView.xmg_Fill(contentView)
 }

 //MARK: Lazy loading private lazy var iconView = UIImageView()
}

private class PlayLayout: UICollectionViewFlowLayout {

 //Rewrite the system to prepare the layout override func prepareLayout() {

  //Set layout layout  itemSize = ().
  minimumInteritemSpacing = 0
  minimumLineSpacing = 0
  scrollDirection = 

  //Set other properties  collectionView?.showsHorizontalScrollIndicator = false
  collectionView?.bounces = false
  collectionView?.pagingEnabled = true
 }
}