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

SWIFT 5

For example, put this method in your ViewController with extensions UICollectionViewDelegate,UICollectionViewDataSource

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