swift - UICollectionViewCompositionalLayout 瀑布

Question

有人可以指导我如何创建“瀑布”布局。到目前为止，我创建的内容如下。但正如你所看到的，我希望删除间距。

func createTwoColumnsLayout() -> UICollectionViewLayout {
    let itemSize = NSCollectionLayoutSize(widthDimension: .fractionalWidth(1.0),
                                          heightDimension: .estimated(250))
    
    let item = NSCollectionLayoutItem(layoutSize: itemSize)

    let groupSize = NSCollectionLayoutSize(widthDimension: .fractionalWidth(1.0),
                                          heightDimension: .estimated(250))
    
    let group = NSCollectionLayoutGroup.horizontal(layoutSize: groupSize, subitem: item, count: 2)
    let spacing = CGFloat(10)
    group.interItemSpacing = .fixed(spacing)

    let section = NSCollectionLayoutSection(group: group)
    section.interGroupSpacing = spacing
    section.contentInsets = NSDirectionalEdgeInsets(top: 0, leading: 10, bottom: 0, trailing: 10)

    let layout = UICollectionViewCompositionalLayout(section: section)
    return layout
}