How to get notify for the current magnified cell index

[Evyasafmordechai]

No description provided.

[Evyasafmordechai]

Listen on UIScrollView delegate:

    func scrollViewDidEndDecelerating(_ scrollView: UIScrollView) {
        let center = self.view.convert(self.collectionView.center, to: self.collectionView)
        guard let indexPath = collectionView.indexPathForItem(at: center) else {
            return
        }
        print("current magnified cell index = \(indexPath.row)")
    }

[Evyasafmordechai]

If you would like to get notify while scrolling for magnify cell change, do as follow:

    private var lastIndexPathForCenterItem = IndexPath(row: 0, section: 0)

    func scrollViewDidScroll(_ scrollView: UIScrollView) {
        callCenterChangedIfNeeded()
    }
    
    private func callCenterChangedIfNeeded() {
        guard let indexPath = indexPathForCenterItem() else {
            return
        }
        guard indexPath != lastIndexPathForCenterItem else {
            return
        }
        lastIndexPathForCenterItem = indexPath
        // Magnify center cell change, do stuff 
    }

    private func indexPathForCenterItem() -> IndexPath? {
        let center = self.view.convert(collectionView.center, to: exploreCollectionView)
        return collectionView.indexPathForItem(at: center)
    }