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Brand Names Section for https://github.com/yfujiki/CompositionalLayoutSample
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| func setupBrandNamesSection() -> NSCollectionLayoutSection { | |
| // 1. Creating section layout. Item -> Group -> Section | |
| // Item | |
| let item = NSCollectionLayoutItem( | |
| layoutSize: NSCollectionLayoutSize(widthDimension: .fractionalWidth(1.0), | |
| heightDimension: .fractionalHeight(1.0))) | |
| item.contentInsets = NSDirectionalEdgeInsets(top: 0.0, | |
| leading: 8.0, | |
| bottom: 0.0, | |
| trailing: 8.0) | |
| // Group | |
| let group = NSCollectionLayoutGroup.vertical( | |
| layoutSize: NSCollectionLayoutSize(widthDimension: .estimated(136), | |
| heightDimension: .absolute(44)), | |
| subitem: item, | |
| count: 1) | |
| // Section | |
| let section = NSCollectionLayoutSection(group: group) | |
| section.contentInsets = NSDirectionalEdgeInsets(top: 16.0, | |
| leading: 0.0, | |
| bottom: 16.0, | |
| trailing: 0.0) | |
| // 2. Magic: Horizontal Scroll. | |
| section.orthogonalScrollingBehavior = .continuousGroupLeadingBoundary | |
| // 3. Creating header layout | |
| section.boundarySupplementaryItems = [headerViewSupplementaryItem] | |
| return section | |
| } |
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| private lazy var headerViewSupplementaryItem: NSCollectionLayoutBoundarySupplementaryItem = { | |
| let headerViewItem = NSCollectionLayoutBoundarySupplementaryItem( | |
| layoutSize: NSCollectionLayoutSize(widthDimension: .fractionalWidth(1.0), | |
| heightDimension: .absolute(44)), | |
| elementKind: UICollectionView.elementKindSectionHeader, | |
| alignment: .top) | |
| headerViewItem.pinToVisibleBounds = true | |
| return headerViewItem | |
| }() |
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