CollectionView move to next cell automatically swift

/**
 Scroll to Next Cell
 */
func scrollToNextCell(){

    //get cell size
    let cellSize = CGSizeMake(self.view.frame.width, self.view.frame.height);

    //get current content Offset of the Collection view
    let contentOffset = collectionView.contentOffset;

    if collectionView.contentSize.width <= collectionView.contentOffset.x + cellSize.width
    {
        collectionView.scrollRectToVisible(CGRectMake(0, contentOffset.y, cellSize.width, cellSize.height), animated: true);

    } else {
        collectionView.scrollRectToVisible(CGRectMake(contentOffset.x + cellSize.width, contentOffset.y, cellSize.width, cellSize.height), animated: true);

    }

}

/**
 Invokes Timer to start Automatic Animation with repeat enabled
 */
func startTimer() {
    NSTimer.scheduledTimerWithTimeInterval(2.0, target: self, selector: Selector("scrollToNextCell"), userInfo: nil, repeats: true);
}

Below is code you can try :

    /**
     Scroll to Next Cell
     */
    func scrollToNextCell(){

        //get Collection View Instance
        let collectionView:UICollectionView;

        //get cell size
        let cellSize = CGSizeMake(self.view.frame.width, self.view.frame.height);

        //get current content Offset of the Collection view
        let contentOffset = collectionView.contentOffset;

        //scroll to next cell
        collectionView.scrollRectToVisible(CGRectMake(contentOffset.x + cellSize.width, contentOffset.y, cellSize.width, cellSize.height), animated: true);


    }

    /**
     Invokes Timer to start Automatic Animation with repeat enabled
     */
    func startTimer() {

        let timer = NSTimer.scheduledTimerWithTimeInterval(1.0, target: self, selector: Selector("scrollToNextCell"), userInfo: nil, repeats: true);


    }

For Swift4

override func viewDidLoad() {
    super.viewDidLoad()

    startTimer()
}



func startTimer() {

    let timer =  Timer.scheduledTimer(timeInterval: 1.0, target: self, selector: #selector(self.scrollAutomatically), userInfo: nil, repeats: true)
}


@objc func scrollAutomatically(_ timer1: Timer) {

    if let coll  = topMenuCollection {
        for cell in coll.visibleCells {
            let indexPath: IndexPath? = coll.indexPath(for: cell)
            if ((indexPath?.row)! < banner.count - 1){
                let indexPath1: IndexPath?
                indexPath1 = IndexPath.init(row: (indexPath?.row)! + 1, section: (indexPath?.section)!)

                coll.scrollToItem(at: indexPath1!, at: .right, animated: true)
            }
            else{
                let indexPath1: IndexPath?
                indexPath1 = IndexPath.init(row: 0, section: (indexPath?.section)!)
                coll.scrollToItem(at: indexPath1!, at: .left, animated: true)
            }

        }
    }
}

topMenuCollection :- your collection view

banner.Count:- a number of cells containing a collection view

Swift 3

This tested code scrolls to the next cell and returns to first item after the last one.

func setTimer() {
     let _ = Timer.scheduledTimer(timeInterval: 3.0, target: self, selector: #selector(MainVC.autoScroll), userInfo: nil, repeats: true)
}
var x = 1
@objc func autoScroll() {
    if self.x < self.storiesForCollectionView.count {
      let indexPath = IndexPath(item: x, section: 0)
      self.collectionViewUp.scrollToItem(at: indexPath, at: .centeredHorizontally, animated: true)
      self.x = self.x + 1
    }else{
      self.x = 0
      self.collectionViewUp.scrollToItem(at: IndexPath(item: 0, section: 0), at: .centeredHorizontally, animated: true)
    }
}

override func viewDidLoad() {
        super.viewDidLoad()
        setTimer()
    }