如何在UICollectionView中将单个单元格居中以显示屏幕？

func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, insetForSectionAt section: Int) -> UIEdgeInsets {
    let cellWidth = collectionView.bounds.width / 2 // 单元格的宽度
    let inset = (collectionView.bounds.width - cellWidth) / 2 // 左右边距
    return UIEdgeInsets(top: 0, left: inset, bottom: 0, right: inset)
}

func collectionView(_ collectionView: UICollectionView, didSelectItemAt indexPath: IndexPath) {
    collectionView.scrollToItem(at: indexPath, at: .centeredHorizontally, animated: true)
}