override func viewDidAppear(_ animated: Bool) {
	print(self.infiniteCollectionView!.centeredIndexPath as Any)
}

override func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
    guard let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "cell", for: indexPath) as? Cell else {
        fatalError()
    }
    cell.update(index: self.infiniteCollectionView!.indexPath(from: indexPath).row)
    return cell
}

override func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
    return 0
}

override func collectionView(_ collectionView: UICollectionView, didSelectItemAt indexPath: IndexPath) {
    collectionView.scrollToItem(at: indexPath, at: self.infiniteCollectionView!.infiniteLayout.scrollDirection == .vertical ? .centeredVertically : .centeredHorizontally, animated: true)
}