我有简单的实现UICollectionViewCompositionalLayout。有两个部分，每个部分都有水平滚动的单行，部分中的每个项目都有整个容器的 1/4 宽度（现在是全屏）。
我想要分页滚动，但是当数据源在该部分提供4n+1 个元素时，我无法滚动访问最后一项。
如何使用简单的最后一项的纯动画来修复它UICollectionViewFlowLayout？
func createCollectionViewLayout() -> UICollectionViewLayout {
UICollectionViewCompositionalLayout { sectionIndex, environment -> NSCollectionLayoutSection? in
let itemSize = NSCollectionLayoutSize(widthDimension: .fractionalWidth(1 / 4), heightDimension: .fractionalHeight(1))
let item = NSCollectionLayoutItem(layoutSize: itemSize)
let groupSize = NSCollectionLayoutSize(widthDimension: .fractionalWidth(1), heightDimension: .fractionalWidth(0.4))
let group = NSCollectionLayoutGroup.horizontal(layoutSize: groupSize, subitem: item, count: 4)
let headerSize = NSCollectionLayoutSize(widthDimension: .fractionalWidth(1), heightDimension: .absolute(44))
let header = NSCollectionLayoutBoundarySupplementaryItem(layoutSize: headerSize, elementKind: UICollectionView.elementKindSectionHeader, alignment: .top)
let section = NSCollectionLayoutSection(group: group)
section.orthogonalScrollingBehavior = .groupPaging
section.boundarySupplementaryItems = [header]
return section
}
}