2019_9_18Reject.pdf

iOS13の新しいAPIであるCompositional LayoutsとDiffable Data Sourcesについての発表です。

Transcript

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2. VISITS Technologiesגࣜձࣾ shiz@stzn3 shiz(ͣ͠) @shiz stzn(shiz) ։ൃܦݧݴޠ: Swift Kotlin Javascript PHP C# Java Go… iOSDC Japan 2019 ίΞελοϑ
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15. class NSCollectionLayoutDimension { class func fractionalWidth(_ fractionalWidth: CGFloat) -> Self class func fractionalHeight(_ fractionalHeight: CGFloat) -> Self } ਌ͷίϯϙʔωϯτͷ
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16. class NSCollectionLayoutDimension { class func absolute(_ absoluteDimension: CGFloat) -> Self class func estimated(_ estimatedDimension: CGFloat) -> Self } ϙΠϯτͰࢦఆ /4$PMMFDUJPO-BZPVU4J[F https://developer.apple.com/documentation/uikit/nscollectionlayoutsize
17. class NSCollectionLayoutDimension { class func absolute(_ absoluteDimension: CGFloat) -> Self class func estimated( _ estimatedDimension: CGFloat) -> Self } /4$PMMFDUJPO-BZPVU4J[F https://developer.apple.com/documentation/uikit/nscollectionlayoutsize
18. https://developer.apple.com/documentation/uikit/nscollectionlayoutitem 4J[FΛࢦఆ͢Δ $FMM΍)FBEFSɺ'PPUFSͳͲ
19. ϨΠΞ΢τͷجຊ୯Ґ https://developer.apple.com/documentation/uikit/nscollectionlayoutgroup
20. *UFNͷͻͱ͔ͨ·Γ https://developer.apple.com/documentation/uikit/nscollectionlayoutgroup
21. ΫϩʔδϟͰॳظԽ https://developer.apple.com/documentation/uikit/nscollectionlayoutgroup
22. Ұͭͷ(SPVQΛࢦఆ (SPVQʹ௥Ճ৘ใΛࢦఆ https://developer.apple.com/documentation/uikit/nscollectionlayoutsection
23. https://developer.apple.com/documentation/uikit/uicollectionviewcompositionallayout https://developer.apple.com/documentation/appkit/nscollectionviewcompositionallayout
24. https://developer.apple.com/documentation/uikit/uicollectionviewcompositionallayout https://developer.apple.com/documentation/appkit/nscollectionviewcompositionallayout Ұͭͷ4FDUJPOΛࢦఆ
25. https://developer.apple.com/documentation/uikit/uicollectionviewcompositionallayout https://developer.apple.com/documentation/appkit/nscollectionviewcompositionallayout ΫϩʔδϟͰ
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26. αϯϓϧίʔυ Ͱ֬ೝ
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28. private func createLayout() -> UICollectionViewLayout { let itemSize = NSCollectionLayoutSize( widthDimension: .fractionalWidth(1.0), heightDimension: .fractionalHeight(1.0)) let item = NSCollectionLayoutItem( layoutSize: itemSize) let groupSize = NSCollectionLayoutSize( widthDimension: .fractionalWidth(1.0), heightDimension: .absolute(44)) let group = NSCollectionLayoutGroup.horizontal( layoutSize: groupSize, subitems: [item]) let section = NSCollectionLayoutSection( group: group) let layout = UICollectionViewCompositionalLayout( section: section) return layout }
29. private func createLayout() -> UICollectionViewLayout { let itemSize = NSCollectionLayoutSize( widthDimension: .fractionalWidth(1.0), heightDimension: .fractionalHeight(1.0)) let item = NSCollectionLayoutItem( layoutSize: itemSize) let groupSize = NSCollectionLayoutSize( widthDimension: .fractionalWidth(1.0), heightDimension: .absolute(44)) let group = NSCollectionLayoutGroup.horizontal( layoutSize: groupSize, subitems: [item]) let section = NSCollectionLayoutSection( group: group) let layout = UICollectionViewCompositionalLayout( section: section) return layout } ᶃ4J[FΛܾΊΔ
30. private func createLayout() -> UICollectionViewLayout { let itemSize = NSCollectionLayoutSize( widthDimension: .fractionalWidth(1.0), heightDimension: .fractionalHeight(1.0)) let item = NSCollectionLayoutItem( layoutSize: itemSize) let groupSize = NSCollectionLayoutSize( widthDimension: .fractionalWidth(1.0), heightDimension: .absolute(44)) let group = NSCollectionLayoutGroup.horizontal( layoutSize: groupSize, subitems: [item]) let section = NSCollectionLayoutSection( group: group) let layout = UICollectionViewCompositionalLayout( section: section) return layout } ᶄ4J[FΛࢦఆͯ͠*UFNΛ࡞Δ
31. private func createLayout() -> UICollectionViewLayout { let itemSize = NSCollectionLayoutSize( widthDimension: .fractionalWidth(1.0), heightDimension: .fractionalHeight(1.0)) let item = NSCollectionLayoutItem( layoutSize: itemSize) let groupSize = NSCollectionLayoutSize( widthDimension: .fractionalWidth(1.0), heightDimension: .absolute(44)) let group = NSCollectionLayoutGroup.horizontal( layoutSize: groupSize, subitems: [item]) let section = NSCollectionLayoutSection( group: group) let layout = UICollectionViewCompositionalLayout( section: section) return layout } ᶅ4J[Fͱ*UFNΛࢦఆͯ͠
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32. private func createLayout() -> UICollectionViewLayout { let itemSize = NSCollectionLayoutSize( widthDimension: .fractionalWidth(1.0), heightDimension: .fractionalHeight(1.0)) let item = NSCollectionLayoutItem( layoutSize: itemSize) let groupSize = NSCollectionLayoutSize( widthDimension: .fractionalWidth(1.0), heightDimension: .absolute(44)) let group = NSCollectionLayoutGroup.horizontal( layoutSize: groupSize, subitems: [item]) let section = NSCollectionLayoutSection( group: group) let layout = UICollectionViewCompositionalLayout( section: section) return layout } ᶆ(SPVQΛࢦఆͯ͠
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33. private func createLayout() -> UICollectionViewLayout { let itemSize = NSCollectionLayoutSize( widthDimension: .fractionalWidth(1.0), heightDimension: .fractionalHeight(1.0)) let item = NSCollectionLayoutItem( layoutSize: itemSize) let groupSize = NSCollectionLayoutSize( widthDimension: .fractionalWidth(1.0), heightDimension: .absolute(44)) let group = NSCollectionLayoutGroup.horizontal( layoutSize: groupSize, subitems: [item]) let section = NSCollectionLayoutSection( group: group) let layout = UICollectionViewCompositionalLayout( section: section) return layout } ᶇ4FDUJPOΛࢦఆͯ͠
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35. private func createLayout() -> UICollectionViewLayout { let itemSize = NSCollectionLayoutSize( widthDimension: .fractionalWidth(0.2), heightDimension: .fractionalHeight(1.0)) let item = NSCollectionLayoutItem(layoutSize: itemSize) let groupSize = NSCollectionLayoutSize(widthDimension: .fractionalWidth(0.2), heightDimension: .fractionalWidth(1.0)) let group = NSCollectionLayoutGroup.horizontal(layoutSize: groupSize, subitems: [item]) let section = NSCollectionLayoutSection(group: group) let layout = UICollectionViewCompositionalLayout(section: section) return layout } ॎˋɺԣˋ (SJE7JFX$POUSPMMFS
36. private func createLayout() -> UICollectionViewLayout { let itemSize = NSCollectionLayoutSize(widthDimension: .fractionalWidth(0.2), heightDimension: .fractionalHeight(1.0)) let item = NSCollectionLayoutItem(layoutSize: itemSize) let groupSize = NSCollectionLayoutSize( widthDimension: .fractionalWidth(1.0), heightDimension: .fractionalWidth(0.2)) let group = NSCollectionLayoutGroup.horizontal(layoutSize: groupSize, subitems: [item]) let section = NSCollectionLayoutSection(group: group) let layout = UICollectionViewCompositionalLayout(section: section) return layout } ॎʹԣͷˋ (SJE7JFX$POUSPMMFS
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38. func createLayout() -> UICollectionViewLayout { let itemSize = NSCollectionLayoutSize( widthDimension: .fractionalWidth(1.0), heightDimension: .fractionalHeight(1.0)) let item = NSCollectionLayoutItem(layoutSize: itemSize) let groupSize = NSCollectionLayoutSize( widthDimension: .fractionalWidth(1.0), heightDimension: .absolute(44)) let group = NSCollectionLayoutGroup.horizontal( layoutSize: groupSize, subitem: item, count: 2) let spacing = CGFloat(10) group.interItemSpacing = .fixed(spacing) let section = NSCollectionLayoutSection(group: group) section.interGroupSpacing = spacing section.contentInsets = NSDirectionalEdgeInsets( top: 0, leading: 10, bottom: 0, trailing: 10) let layout = UICollectionViewCompositionalLayout(section: section) return layout } 5XP$PMVNO7JFX$POUSPMMFS ΞΠςϜ਺Λʹࢦఆ ॎɺԣ
39. 5XP$PMVNO7JFX$POUSPMMFS
40. DistinctSectionsViewController
41. func createLayout() -> UICollectionViewLayout { let layout = UICollectionViewCompositionalLayout { (sectionIndex: Int, layoutEnvironment: NSCollectionLayoutEnvironment) -> NSCollectionLayoutSection? in guard let sectionLayoutKind = ɹ SectionLayoutKind(rawValue: sectionIndex) else { ɹɹ return nil ɹ} let columns = sectionLayoutKind.columnCount let itemSize = NSCollectionLayoutSize(widthDimension: .fractionalWidth(1.0), heightDimension: .fractionalHeight(1.0)) let item = NSCollectionLayoutItem(layoutSize: itemSize) item.contentInsets = NSDirectionalEdgeInsets(top: 2, leading: 2, bottom: 2, trailing: 2) let groupHeight = columns == 1 ? NSCollectionLayoutDimension.absolute(44) : NSCollectionLayoutDimension.fractionalWidth(0.2) let groupSize = NSCollectionLayoutSize( ɹɹɹɹɹɹɹɹɹɹɹɹɹ widthDimension: .fractionalWidth(1.0), heightDimension: groupHeight) let group = NSCollectionLayoutGroup.horizontal( layoutSize: groupSize, subitem: item, count: columns) let section = NSCollectionLayoutSection(group: group) section.contentInsets = NSDirectionalEdgeInsets(top: 20, leading: 20, bottom: 20, trailing: 20) return section } return layout } DistinctSectionsViewController 4FDUJPO͝ͱʹ
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42. func createLayout() -> UICollectionViewLayout { let layout = UICollectionViewCompositionalLayout { (sectionIndex: Int, layoutEnvironment: NSCollectionLayoutEnvironment) -> NSCollectionLayoutSection? in guard let sectionLayoutKind = ɹ SectionLayoutKind(rawValue: sectionIndex) else { ɹɹ return nil ɹ} let columns = sectionLayoutKind.columnCount let itemSize = NSCollectionLayoutSize(widthDimension: .fractionalWidth(1.0), heightDimension: .fractionalHeight(1.0)) let item = NSCollectionLayoutItem(layoutSize: itemSize) item.contentInsets = NSDirectionalEdgeInsets(top: 2, leading: 2, bottom: 2, trailing: 2) let groupHeight = columns == 1 ? NSCollectionLayoutDimension.absolute(44) : NSCollectionLayoutDimension.fractionalWidth(0.2) let groupSize = NSCollectionLayoutSize( ɹɹɹɹɹɹɹɹɹɹɹɹɹ widthDimension: .fractionalWidth(1.0), heightDimension: groupHeight) let group = NSCollectionLayoutGroup.horizontal( layoutSize: groupSize, subitem: item, count: columns) let section = NSCollectionLayoutSection(group: group) section.contentInsets = NSDirectionalEdgeInsets(top: 20, leading: 20, bottom: 20, trailing: 20) return section } return layout } DistinctSectionsViewController 4FDUJPOʹԠͯ͡ΧϥϜ਺Λมߋ
43. ItemBadgeSupplementaryViewController
44. func createLayout() -> UICollectionViewLayout { let badgeAnchor = NSCollectionLayoutAnchor( edges: [.top, .trailing], fractionalOffset: CGPoint(x: 0.3, y: -0.3)) let badgeSize = NSCollectionLayoutSize(widthDimension: .absolute(20), heightDimension: .absolute(20)) let badge = NSCollectionLayoutSupplementaryItem( layoutSize: badgeSize, elementKind: ItemBadgeSupplementaryViewController.badgeElementKind, containerAnchor: badgeAnchor) let itemSize = NSCollectionLayoutSize(widthDimension: .fractionalWidth(0.25), heightDimension: .fractionalHeight(1.0)) let item = NSCollectionLayoutItem(layoutSize: itemSize, supplementaryItems: [badge]) item.contentInsets = NSDirectionalEdgeInsets(top: 5, leading: 5, bottom: 5, trailing: 5) let groupSize = NSCollectionLayoutSize(widthDimension: .fractionalWidth(1.0), heightDimension: .fractionalWidth(0.2)) let group = NSCollectionLayoutGroup.horizontal(layoutSize: groupSize, subitems: [item]) let section = NSCollectionLayoutSection(group: group) section.contentInsets = NSDirectionalEdgeInsets(top: 20, leading: 20, bottom: 20, trailing: 20) let layout = UICollectionViewCompositionalLayout(section: section) return layout } ItemBadgeSupplementaryViewController
45. func createLayout() -> UICollectionViewLayout { let badgeAnchor = NSCollectionLayoutAnchor(edges: [.top, .trailing], fractionalOffset: CGPoint(x: 0.3, y: -0.3)) let badgeSize = NSCollectionLayoutSize(widthDimension: .absolute(20), heightDimension: .absolute(20)) let badge = NSCollectionLayoutSupplementaryItem( layoutSize: badgeSize, elementKind: ItemBadgeSupplementaryViewController .badgeElementKind, containerAnchor: badgeAnchor) let itemSize = NSCollectionLayoutSize(widthDimension: .fractionalWidth(0.25), heightDimension: .fractionalHeight(1.0)) let item = NSCollectionLayoutItem(layoutSize: itemSize, supplementaryItems: [badge]) item.contentInsets = NSDirectionalEdgeInsets(top: 5, leading: 5, bottom: 5, trailing: 5) let groupSize = NSCollectionLayoutSize(widthDimension: .fractionalWidth(1.0), heightDimension: .fractionalWidth(0.2)) let group = NSCollectionLayoutGroup.horizontal(layoutSize: groupSize, subitems: [item]) let section = NSCollectionLayoutSection(group: group) section.contentInsets = NSDirectionalEdgeInsets(top: 20, leading: 20, bottom: 20, trailing: 20) let layout = UICollectionViewCompositionalLayout(section: section) return layout } ItemBadgeSupplementaryViewController SupplementaryItemΛ࡞੒
46. func createLayout() -> UICollectionViewLayout { let badgeAnchor = NSCollectionLayoutAnchor(edges: [.top, .trailing], fractionalOffset: CGPoint(x: 0.3, y: -0.3)) let badgeSize = NSCollectionLayoutSize(widthDimension: .absolute(20), heightDimension: .absolute(20)) let badge = NSCollectionLayoutSupplementaryItem( layoutSize: badgeSize, elementKind: ItemBadgeSupplementaryViewController.badgeElementKind, containerAnchor: badgeAnchor) let itemSize = NSCollectionLayoutSize(widthDimension: .fractionalWidth(0.25), heightDimension: .fractionalHeight(1.0)) let item = NSCollectionLayoutItem( layoutSize: itemSize, supplementaryItems: [badge]) item.contentInsets = NSDirectionalEdgeInsets(top: 5, leading: 5, bottom: 5, trailing: 5) let groupSize = NSCollectionLayoutSize(widthDimension: .fractionalWidth(1.0), heightDimension: .fractionalWidth(0.2)) let group = NSCollectionLayoutGroup.horizontal(layoutSize: groupSize, subitems: [item]) let section = NSCollectionLayoutSection(group: group) section.contentInsets = NSDirectionalEdgeInsets(top: 20, leading: 20, bottom: 20, trailing: 20) let layout = UICollectionViewCompositionalLayout(section: section) return layout } ItemBadgeSupplementaryViewController Itemʹࢦఆ
47. ItemBadgeSupplementaryViewController
48. OrthogonalScrollingViewController
49. func createLayout() -> UICollectionViewLayout { let layout = UICollectionViewCompositionalLayout { (sectionIndex: Int, layoutEnvironment: NSCollectionLayoutEnvironment) -> NSCollectionLayoutSection? in let leadingItem = NSCollectionLayoutItem(layoutSize: NSCollectionLayoutSize(widthDimension: .fractionalWidth(0.7), heightDimension: .fractionalHeight(1.0))) leadingItem.contentInsets = NSDirectionalEdgeInsets(top: 10, leading: 10, bottom: 10, trailing: 10) let trailingItem = NSCollectionLayoutItem(layoutSize: NSCollectionLayoutSize(widthDimension: .fractionalWidth(1.0), heightDimension: .fractionalHeight(0.3))) trailingItem.contentInsets = NSDirectionalEdgeInsets(top: 10, leading: 10, bottom: 10, trailing: 10) let trailingGroup = NSCollectionLayoutGroup.vertical(layoutSize: NSCollectionLayoutSize(widthDimension: .fractionalWidth(0.3), heightDimension: .fractionalHeight(1.0)), subitem: trailingItem, count: 2) let containerGroup = NSCollectionLayoutGroup.horizontal( layoutSize: NSCollectionLayoutSize( widthDimension: .fractionalWidth(0.85), heightDimension: .fractionalHeight(0.4)), subitems: [leadingItem, trailingGroup]) let section = NSCollectionLayoutSection(group: containerGroup) section.orthogonalScrollingBehavior = .continuous return section } return layout } (SPVQͷதʹ(SPVQΛೖΕΔ OrthogonalScrollingViewController
50. func createLayout() -> UICollectionViewLayout { let layout = UICollectionViewCompositionalLayout { (sectionIndex: Int, layoutEnvironment: NSCollectionLayoutEnvironment) -> NSCollectionLayoutSection? in let leadingItem = NSCollectionLayoutItem(layoutSize: NSCollectionLayoutSize(widthDimension: .fractionalWidth(0.7), heightDimension: .fractionalHeight(1.0))) leadingItem.contentInsets = NSDirectionalEdgeInsets(top: 10, leading: 10, bottom: 10, trailing: 10) let trailingItem = NSCollectionLayoutItem(layoutSize: NSCollectionLayoutSize(widthDimension: .fractionalWidth(1.0), heightDimension: .fractionalHeight(0.3))) trailingItem.contentInsets = NSDirectionalEdgeInsets(top: 10, leading: 10, bottom: 10, trailing: 10) let trailingGroup = NSCollectionLayoutGroup.vertical(layoutSize: NSCollectionLayoutSize(widthDimension: .fractionalWidth(0.3), heightDimension: .fractionalHeight(1.0)), subitem: trailingItem, count: 2) let containerGroup = NSCollectionLayoutGroup.horizontal(layoutSize: NSCollectionLayoutSize(widthDimension: .fractionalWidth(0.85), heightDimension: .fractionalHeight(0.4)), subitems: [leadingItem, trailingGroup]) let section = NSCollectionLayoutSection( group: containerGroup) section.orthogonalScrollingBehavior = .continuous return section } return layout } OrthogonalScrollingViewController ωετ͞Εͨ(SPVQͷ
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51. OrthogonalScrollBehaviorViewController
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57. QFSGPSN#BUDI6QEBUFT collectionView.performBatchUpdates({ var deletes = [Int]() var inserts = [(person:Person, index:Int)]() … for deletedIndex in deletes.sorted().reversed() { people.remove(at: deletedIndex) } let sortedInserts = inserts.sorted(by: { (personA, personB) -> Bool in return personA.index <= personB.index }) for insertion in sortedInserts { people.insert(insertion.person, at: insertion.index) } IUUQTEFWFMPQFSBQQMFDPNEPDVNFOUBUJPOVJLJUVJDPMMFDUJPOWJFXDVTUPNJ[JOH@DPMMFDUJPO@WJFX@MBZPVUT DIBOHFTMBUFTU@NJOPS ॱ൪Λؒҧ͑Δͱ
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    *OEFY1BUIΛ࢖Θͳ͍ class NSDiffableDataSourceSnapshot<SectionIdentifierType, ItemIdentifierType> where SectionIdentifierType : Hashable, ItemIdentifierType : Hashable
60. αϯϓϧίʔυ Ͱ֬ೝ
61. .PVOUBJOT7JFX$POUSPMMFS
62. 6*ͷߋ৽ εςοϓ func performQuery(with filter: String?) { let mountains = mountainsController .filteredMountains(with: filter) .sorted { $0.name < $1.name } let snapshot = NSDiffableDataSourceSnapshot<Section, Mountain>() snapshot.appendSections([.main]) snapshot.appendItems(mountains) dataSource.apply(snapshot, animatingDifferences: true) } ͭͷεςοϓΛ౿Ή͚ͩͰઃఆ͕Ͱ͖Δ .PVOUBJOT7JFX$POUSPMMFS
63. func performQuery(with filter: String?) { let mountains = mountainsController .filteredMountains(with: filter) .sorted { $0.name < $1.name } let snapshot = NSDiffableDataSourceSnapshot<Section, Mountain>() snapshot.appendSections([.main]) snapshot.appendItems(mountains) dataSource.apply(snapshot, animatingDifferences: true) } .PVOUBJOT7JFX$POUSPMMFS 1. ৽͍͠Snapshotͷੜ੒
64. func performQuery(with filter: String?) { let mountains = mountainsController.filteredMountains(with: filter) .sorted { $0.name < $1.name } let snapshot = NSDiffableDataSourceSnapshot<Section, Mountain>() snapshot.appendSections([.main]) snapshot.appendItems(mountains) dataSource.apply(snapshot, animatingDifferences: true) } .PVOUBJOT7JFX$POUSPMMFS 2. ߋ৽͍ͨ͠৘ใͷ௥Ճ
65. func performQuery(with filter: String?) { let mountains = mountainsController.filteredMountains(with: filter) .sorted { $0.name < $1.name } let snapshot = NSDiffableDataSourceSnapshot<Section, Mountain>() snapshot.appendSections([.main]) snapshot.appendItems(mountains) dataSource.apply( snapshot, animatingDifferences: true) } .PVOUBJOT7JFX$POUSPMMFS 3. applyͷݺͼग़͠
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67. %BUB4PVSDFͷઃఆ func configureDataSource() { dataSource = UICollectionViewDiffableDataSource <Section, MountainsController.Mountain> (collectionView: mountainsCollectionView) { (collectionView: UICollectionView, indexPath: IndexPath, mountain: MountainsController.Mountain) -> UICollectionViewCell? in guard let mountainCell = collectionView.dequeueReusableCell( withReuseIdentifier: LabelCell.reuseIdentifier, for: indexPath) as? LabelCell else { fatalError("Cannot create new cell") } mountainCell.label.text = mountain.name return mountainCell } } .PVOUBJOT7JFX$POUSPMMFS
68. ΫϩʔδϟͰηϧ΁ͷઃఆํ๏Λࢦఆ func configureDataSource() { dataSource = UICollectionViewDiffableDataSource <Section, MountainsController.Mountain> (collectionView: mountainsCollectionView) { (collectionView: UICollectionView, indexPath: IndexPath, mountain: MountainsController.Mountain) -> UICollectionViewCell? in guard let mountainCell = collectionView.dequeueReusableCell( withReuseIdentifier: LabelCell.reuseIdentifier, for: indexPath) as? LabelCell else { fatalError("Cannot create new cell") } mountainCell.label.text = mountain.name return mountainCell } } .PVOUBJOT7JFX$POUSPMMFS
69. func configureDataSource() { dataSource = UICollectionViewDiffableDataSource <Section, MountainsController.Mountain> (collectionView: mountainsCollectionView) { (collectionView: UICollectionView, indexPath: IndexPath, mountain: MountainsController.Mountain) -> UICollectionViewCell? in guard let mountainCell = collectionView.dequeueReusableCell( withReuseIdentifier: LabelCell.reuseIdentifier, for: indexPath) as? LabelCell else { fatalError("Cannot create new cell") } mountainCell.label.text = mountain.name return mountainCell } } IndexPathΛ࢖༻͍ͯ͠ͳ͍ .PVOUBJOT7JFX$POUSPMMFS
70. 8J'J4FUUJOHT7JFX$POUSPMMFS
71. ηΫγϣϯ͕ෳ਺͋Δ func updateUI(animated: Bool = true) { … currentSnapshot.appendSections([.config]) currentSnapshot.appendItems(configItems, toSection: .config) if controller.wifiEnabled { let sortedNetworks = controller.availableNetworks.sorted { $0.name < $1.name } let networkItems = sortedNetworks.map { Item(network: $0) } currentSnapshot.appendSections([.networks]) currentSnapshot.appendItems(networkItems, toSection: .networks) } self.dataSource.apply(currentSnapshot, animatingDifferences: animated) } 8J'J4FUUJOHT7JFX$POUSPMMFS ηΫγϣϯ͝ͱʹ஋Λઃఆ͢Δ
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73. ඞཁͳͱ͜Ζ͚ͩߋ৽͢Δ func performSortStep() { let updatedSnapshot = dataSource.snapshot() updatedSnapshot.sectionIdentifiers.forEach { let section = $0 if !section.isSorted { section.sortNext() let items = section.values updatedSnapshot.deleteItems(items) updatedSnapshot.appendItems(items, toSection: section) sectionCountNeedingSort += 1 } } … } ݱࡏͷ4OBQTIPUͷঢ়ଶΛऔಘ *OTFSUJPO4PSU7JFX$POUSPMMFS
74. func performSortStep() { let updatedSnapshot = dataSource.snapshot() updatedSnapshot.sectionIdentifiers.forEach { let section = $0 if !section.isSorted { section.sortNext() let items = section.values updatedSnapshot.deleteItems(items) updatedSnapshot.appendItems( items, toSection: section) sectionCountNeedingSort += 1 } } … } ඞཁͳͱ͜ΖͷΈߋ৽ *OTFSUJPO4PSU7JFX$POUSPMMFS
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