Detect page change in UICollectionView

Question

I tried finding this question for a while but could not find this problem\'s answer. My problem is that i have a UICollectionView and the Scroll Direction is

Answer 1

Based on @Shankar BS 's answer I've implemented it like this in Swit. Keep in mind that CollectionViewDelegate conforms to ScrollViewDelegate:

func scrollViewDidEndDecelerating(_ scrollView: UIScrollView) {
    let pageWidth = scrollView.frame.size.width
    let page = Int(floor((scrollView.contentOffset.x - pageWidth / 2) / pageWidth) + 1)
    print("page = \(page)")
}