vipulRajput

class CollectionViewController: UIViewController {
  ...
  func snapToCenter() {
      let centerPoint = view.convertPoint(view.center, toView: collectionView)
      guard let centerIndexPath = collectionView.indexPathForItemAtPoint(centerPoint)
      collectionView.scrollToItemAtIndexPath(centerIndexPath, atScrollPosition: .CenteredHorizontally, animated: true)
  }
  ...  
}