SwiftUI Navigation のすべて

iOSDC Japan 2022 で発表した内容です

1. SwiftUI Navigation ͷ͢΂ͯ iOSDC Japan 2022 kalupas226
2. ࣗݾ঺հ • ΞΠΧϫ • @kalupas226 • Cookpad Inc. iOS Developer 2
3. ΞδΣϯμ • SwiftUI Navigation ͷ၆ᛌ • ༷ʑͳछྨ ͷ Navigation • OS ʹΑΔมԽ͕ܹ͍͠ Navigation • Fire and forget / State driven Navigation API • SwiftUI ͷ Navigation API ʹ͓͚Δ՝୊ • Navigation API ͷ՝୊ʹͲ͏ཱͪ޲͔͏͔ • ʮswiftui-navigationʯͷΞϓϩʔν • ·ͱΊ 3
4. 􀁟 ຊτʔΫͰ࿩͞ͳ͍͜ͱ • ։ൃऀ͕ͦΕͧΕͰఆٛ͢Δಠࣗͷ Custom Navigation • iOS Ҏ֎ͷϓϥοτϑΥʔϜʹ͓͚Δ Navigation • ΞϓϦέʔγϣϯʹ͓͚Δ Navigation ͸͜͏͋Δ΂͖ͱ͍͏Α͏ͳ 
 σβΠϯతͳ࿩ 4
5. 􀁟 ຊτʔΫͰओʹࢀߟʹ͍ͯ͠Δ৘ใ • Point-Free ੡ͷʮswiftui-navigationʯͱ͍͏ϥΠϒϥϦ • https://github.com/pointfreeco/swiftui-navigation • ൃද಺Ͱ͸ҎԼͷΑ͏ʹ۠ผͯ͠આ໌͠·͢ • SwiftUI Navigation API: Apple ७ਖ਼ͷ API ʹ͍ͭͯͷ࿩ • ʮswiftui-navigationʯ: ϥΠϒϥϦʹ͍ͭͯͷ࿩ 5
6. SwiftUI Navigation ͷ၆ᛌ
7. SwiftUI Navigation ͷ၆ᛌ ༷ʑͳछྨͷ Navigation
8. ༷ʑͳछྨͷ Navigation API ͕ଘࡏ͢Δ • Tab • Alert • Sheet • Full Screen Cover • Con fi rmation Dialog • Popover • Navigation Link… SwiftUI Navigation ͷ၆ᛌ > ༷ʑͳछྨͷ Navigation 8
9. Tab TabView { FirstView() .tabItem { Image(systemName: "exclamationmark.circle") Text("Alert") } SecondView() .tabItem {…} ThirdView() .tabItem {…} FourthView() .tabItem {…} } SwiftUI Navigation ͷ၆ᛌ > ༷ʑͳछྨͷ Navigation
10. Alert BaseView() .alert( “Alert͕දࣔ͞Ε·ͨ͠”, isPresented: $isPresentedAlert, actions: { Button("OK", action: {}) } ) SwiftUI Navigation ͷ၆ᛌ > ༷ʑͳछྨͷ Navigation
11. Sheet BaseView() .sheet( isPresented: $isPresentedAlert, content: { Text("Sheet͕දࣔ͞Ε·ͨ͠") } ) SwiftUI Navigation ͷ၆ᛌ > ༷ʑͳछྨͷ Navigation
12. NavigationViewɾNavigationLink (Deprecated) NavigationView { ForEach(1...10, id: \.self) { id in NavigationLink( "Go to \(id) simple destination", destination: { Text("This is \(id) destination") } ) } } SwiftUI Navigation ͷ၆ᛌ > ༷ʑͳछྨͷ Navigation
13. SwiftUI Navigation ͷ၆ᛌ OS ʹΑΔมԽ͕ܹ͍͠ Navigation
14. OS ͕ਐԽ͢ΔʹͭΕ API ͷܗ΋มΘ͖ͬͯͨ • ActionSheet API (deprecated) → Con fi rmation Dialog API • Alert API • deprecated ʹͳͬͨ΋ͷͱɺͦ͏Ͱͳ͍΋ͷ͕͋Δ • Navigation-base API • NavigationView → NavigationStack • NavigationLink 14 SwiftUI Navigation ͷ၆ᛌ > OS ʹΑΔมԽ͕ܹ͍͠ Navigation
15. ActionSheet API (deprecated) .actionSheet(isPresented: $showActionSheet) { ActionSheet( title: Text(...), message: Text(...), buttons: [ .cancel(), .destructive( Text(...), action: {} ), .default( Text(...), action: {} ) ] ) } SwiftUI Navigation ͷ၆ᛌ > OS ʹΑΔมԽ͕ܹ͍͠ Navigation
16. ActionSheet API (deprecated) .actionSheet(isPresented: $showActionSheet) { ActionSheet( title: Text(...), message: Text(...), buttons: [ .cancel(), .destructive( Text(...), action: {} ), .default( Text(...), action: {} ) ] ) } SwiftUI Navigation ͷ၆ᛌ > OS ʹΑΔมԽ͕ܹ͍͠ Navigation
17. ActionSheet API (deprecated) .actionSheet(isPresented: $showActionSheet) { ActionSheet( title: Text(...), message: Text(...), buttons: [ .cancel(), .destructive( Text(...), action: {} ), .default( Text(...), action: {} ) ] ) } SwiftUI Navigation ͷ၆ᛌ > OS ʹΑΔมԽ͕ܹ͍͠ Navigation
18. Con fi rmation Dialog API(iOS 15~) .confirmationDialog( “Title", isPresented: $isConfirming presenting: dialogDetail ) { detail in Button { } label: { Text("Import \(detail.name)") } Button("Cancel", role: .cancel) { dialogDetail = nil } } message: { detail in Text(\(detail.name) \(detail.type)) } SwiftUI Navigation ͷ၆ᛌ > OS ʹΑΔมԽ͕ܹ͍͠ Navigation
19. Con fi rmation Dialog API(iOS 15~) .confirmationDialog( “Title", isPresented: $isConfirming, presenting: dialogDetail ) { detail in Button { } label: { Text("Import \(detail.name)") } Button("Cancel", role: .cancel) { dialogDetail = nil } } message: { detail in Text(\(detail.name) \(detail.type)) } SwiftUI Navigation ͷ၆ᛌ > OS ʹΑΔมԽ͕ܹ͍͠ Navigation
20. Con fi rmation Dialog API(iOS 15~) .confirmationDialog( “Title", isPresented: $isConfirming, presenting: dialogDetail ) { detail in Button { } label: { Text("Import \(detail.name)") } Button("Cancel", role: .cancel) { dialogDetail = nil } } message: { detail in Text(\(detail.name) \(detail.type)) } SwiftUI Navigation ͷ၆ᛌ > OS ʹΑΔมԽ͕ܹ͍͠ Navigation
21. Alert API (deprecated) .alert(isPresented: $showAlert) { Alert( title: Text("Title"), message: Text("Message") ) } SwiftUI Navigation ͷ၆ᛌ > OS ʹΑΔมԽ͕ܹ͍͠ Navigation
22. Alert API (deprecated) .alert(item: $alertDetails) { details in Alert( title: Text("Title"), message: Text(""" Imported \(details.name) \n Filetype: \(details.fileType). """), dismissButton: .default(Text("Dismiss")) ) } SwiftUI Navigation ͷ၆ᛌ > OS ʹΑΔมԽ͕ܹ͍͠ Navigation
23. Alert API (iOS 15~) .alert( "Alert͕දࣔ͞Ε·ͨ͠", isPresented: $isPresentedAlert, actions: { Button("OK", action: {}) } ) SwiftUI Navigation ͷ၆ᛌ > OS ʹΑΔมԽ͕ܹ͍͠ Navigation
24. NavigationViewɾOld NavigationLink (deprecated) NavigationView { List(model.notes) { note in NavigationLink( note.title, destination: NoteEditor(id: note.id) ) } } SwiftUI Navigation ͷ၆ᛌ > OS ʹΑΔมԽ͕ܹ͍͠ Navigation
25. NavigationViewɾOld NavigationLink (deprecated) NavigationView { List(model.notes) { note in NavigationLink( note.title, destination: NoteEditor(id: note.id) ) } } SwiftUI Navigation ͷ၆ᛌ > OS ʹΑΔมԽ͕ܹ͍͠ Navigation
26. NavigationViewɾOld NavigationLink (deprecated) NavigationView { List(model.notes) { note in NavigationLink( note.title, // ભҠݩͷ View ʹදࣔ͞ΕΔ title destination: NoteEditor(id: note.id) // ભҠޙͷը໘ ) } } SwiftUI Navigation ͷ၆ᛌ > OS ʹΑΔมԽ͕ܹ͍͠ Navigation
27. Simple NavigationStackɾNew NavigationLink NavigationStack { List(parks) { park in NavigationLink( park.name, value: park ) } .navigationDestination(for: Park.self) { park in ParkDetails(park: park) } } SwiftUI Navigation ͷ၆ᛌ > OS ʹΑΔมԽ͕ܹ͍͠ Navigation
28. Simple NavigationStackɾNew NavigationLink NavigationStack { List(parks) { park in NavigationLink( park.name, value: park ) } .navigationDestination(for: Park.self) { park in ParkDetails(park: park) } } SwiftUI Navigation ͷ၆ᛌ > OS ʹΑΔมԽ͕ܹ͍͠ Navigation
29. Simple NavigationStackɾNew NavigationLink NavigationStack { List(parks) { park in NavigationLink( park.name, // ભҠݩͷը໘ʹදࣔ͢Δ title value: park // ೚ҙͷܕͷ value ) } .navigationDestination(for: Park.self) { park in ParkDetails(park: park) } } SwiftUI Navigation ͷ၆ᛌ > OS ʹΑΔมԽ͕ܹ͍͠ Navigation
30. Simple NavigationStackɾNew NavigationLink NavigationStack { List(parks) { park in NavigationLink( park.name, value: park ) } // value ͷܕʹԠͯ͡ navigationDestination ͕൓Ԡ͢Δ .navigationDestination(for: Park.self) { park in ParkDetails(park: park) } } SwiftUI Navigation ͷ၆ᛌ > OS ʹΑΔมԽ͕ܹ͍͠ Navigation
31. Binding NavigationStackɾNew NavigationLink @State private var presentedParks: [Park] = [] // ... NavigationStack(path: $presentedParks) { List(parks) { park in NavigationLink(park.name, value: park) } .navigationDestination(for: Park.self) { park in ParkDetails(park: park) } } SwiftUI Navigation ͷ၆ᛌ > OS ʹΑΔมԽ͕ܹ͍͠ Navigation
32. Binding NavigationStackɾNew NavigationLink @State private var presentedParks: [Park] = [] // ... NavigationStack(path: $presentedParks) { List(parks) { park in NavigationLink(park.name, value: park) } .navigationDestination(for: Park.self) { park in ParkDetails(park: park) } } SwiftUI Navigation ͷ၆ᛌ > OS ʹΑΔมԽ͕ܹ͍͠ Navigation
33. Binding NavigationStackɾNew NavigationLink @State private var presentedParks: [Park] = [] // ... NavigationStack(path: $presentedParks) { // ... } func showParks() { // RootView -> Park("Yosemite") -> Park("Sequoia") presentedParks = [Park("Yosemite"), Park("Sequoia")] } SwiftUI Navigation ͷ၆ᛌ > OS ʹΑΔมԽ͕ܹ͍͠ Navigation ※ iOS 16 ͷ API ʹ͍ͭͯͷ FB: https://gist.github.com/mbrandonw/f8b94957031160336cac6898a919cbb7
34. SwiftUI Navigation ͷ၆ᛌ Fire and forget / State driven Navigation API
35. Navigation API ͸େ͖͘ 2 ͭʹ෼ྨͰ͖Δ • ʮswiftui-navigationʯREADME ͔ΒҾ༻ • Fire and forget Navigation API • State driven Navigation API 35 SwiftUI Navigation ͷ၆ᛌ > Fire and forget / State driven Navigation API
36. Navigation API ͸େ͖͘ 2 ͭʹ෼ྨͰ͖Δ • Fire and forget Navigation API • State driven Navigation API 36 SwiftUI Navigation ͷ၆ᛌ > Fire and forget / State driven Navigation API
37. Fire and forget Navigation API • Binding Ҿ਺ΛऔΒͳ͍ • SwiftUI ͕ Navigation ͷঢ়ଶΛ׬શʹ಺෦Ͱ؅ཧ͢Δ • Navigation Λૉૣ࣮͘ݱͰ͖Δ͕ɺNavigation ʹରͯ͠ 
 ϓϩάϥϜతͳ੍ޚ͕Ͱ͖ͳ͘ͳΔ 37 SwiftUI Navigation ͷ၆ᛌ > Fire and forget / State driven Navigation API
38. Fire and forget API - Tab - TabView { ReceivedView() .tabItem { // ... } SentView() .tabItem { // ... } AccountView() .tabItem { // ... } } SwiftUI Navigation ͷ၆ᛌ > Fire and forget / State driven Navigation API
39. Fire and forget API - Tab - // Binding Ҿ਺ΛऔΒͳ͍ɻλοϓͰ͔͠ navigation Ͱ͖ͳ͍ TabView { ReceivedView() .tabItem { // ... } SentView() .tabItem { // ... } AccountView() .tabItem { // ... } } SwiftUI Navigation ͷ၆ᛌ > Fire and forget / State driven Navigation API
40. Fire and forget API - NavigationLink - NavigationView { List(model.notes) { note in NavigationLink( note.title, destination: NoteEditor(id: note.id) ) } Text("Select a Note") } SwiftUI Navigation ͷ၆ᛌ > Fire and forget / State driven Navigation API
41. Fire and forget API - NavigationLink - NavigationView { List(model.notes) { note in // Binding Ҿ਺ΛऔΒͳ͍ɻλοϓͰ͔͠ navigation Ͱ͖ͳ͍ NavigationLink( note.title, destination: NoteEditor(id: note.id) ) } Text("Select a Note") } SwiftUI Navigation ͷ၆ᛌ > Fire and forget / State driven Navigation API
42. Navigation API ͸େ͖͘ 2 ͭʹ෼ྨͰ͖Δ • Fire and forget Navigation API • State driven Navigation API 42 SwiftUI Navigation ͷ၆ᛌ > Fire and forget / State driven Navigation API
43. State driven Navigation API • Binding Ҿ਺ΛऔΔ • Navigation Λ༗ޮɾແޮʹ͢Δ࣌ʹυϝΠϯͷঢ়ଶ΋มߋͰ͖Δ • Fire and forget API ΑΓෳࡶͰ͸͋Δ͕ɺϓϩάϥϜతͳ੍ޚ͕ 
 ՄೳͱͳΔͨΊɺ࢖͍ํʹΑͬͯ͸ Deep Link ͳͲ΋࣮ݱͰ͖Δ 43 SwiftUI Navigation ͷ၆ᛌ > Fire and forget / State driven Navigation API
44. State driven API - Tab - struct ContentView: View { @State var selectedTab: Tab = .received var body: some View { TabView(selection: $selectedTab) { ReceivedView().tabItem { ... } .tag(Tab.received) SentView().tabItem { ... } .tag(Tab.sent) AccountView().tabItem { ... } .tag(Tab.account) } } } SwiftUI Navigation ͷ၆ᛌ > Fire and forget / State driven Navigation API
45. State driven API - Tab - struct ContentView: View { @State var selectedTab: Tab = .received var body: some View { TabView(selection: $selectedTab) { ReceivedView().tabItem { ... } .tag(Tab.received) SentView().tabItem { ... } .tag(Tab.sent) AccountView().tabItem { ... } .tag(Tab.account) } } } SwiftUI Navigation ͷ၆ᛌ > Fire and forget / State driven Navigation API
46. State driven API - Tab - struct ContentView: View { @State var selectedTab: Tab = .sent var body: some View { TabView(selection: $selectedTab) { ReceivedView().tabItem { ... } .tag(Tab.received) SentView().tabItem { ... } .tag(Tab.sent) AccountView().tabItem { ... } .tag(Tab.account) } } } SwiftUI Navigation ͷ၆ᛌ > Fire and forget / State driven Navigation API
47. ҟͳΔ View ͰแΉͱ Deep Link Ͱ͖ͳ͍ struct ContainerView: View { var body: some View { ContentView(selectedTab: .received) } } SwiftUI Navigation ͷ၆ᛌ > Fire and forget / State driven Navigation API
48. ContainerView ʹঢ়ଶΛ࣋ͨͤͯղܾ͢Δʁ struct ContainerView: View { let selectedTab: Tab var body: some View { ContentView(selectedTab: selectedTab) } } SwiftUI Navigation ͷ၆ᛌ > Fire and forget / State driven Navigation API
49. ContainerView ʹঢ়ଶΛ࣋ͨͤͯղܾ͢Δʁ struct ContainerView: View { // ContainerView ʹؔ܎ͳ͍ Tab ͷঢ়ଶΛ࣋ͨͤΔͷ͸ඍົ // ͔͠΋ ContentView ͷ selectedTab ͸ @State ͳͷͰޡΓ let selectedTab: Tab var body: some View { ContentView(selectedTab: selectedTab) } } SwiftUI Navigation ͷ၆ᛌ > Fire and forget / State driven Navigation API
50. ΞϓϦͷঢ়ଶΛ؅ཧ͢Δ ViewModel Λಋೖ͠ 
 ղܾ͢Δ class AppViewModel: ObservableObject { @Published var selectedTab: Tab init(selectedTab: Tab = .received) { self.selectedTab = selectedTab } } SwiftUI Navigation ͷ၆ᛌ > Fire and forget / State driven Navigation API
51. ΞϓϦͷঢ়ଶΛ؅ཧ͢Δ ViewModel Λಋೖ͠ 
 ղܾ͢Δ struct ContentView: View { @ObservedObject var viewModel: AppViewModel var body: some View { TabView(selection: $viewModel.selectedTab) { // ... } } } // ContentView ͷ initialize ࣌ʹ Tab Λૢ࡞Ͱ͖ΔΑ͏ʹͳͬͨ ContentView(viewModel: .init(selectedTab: .two)) SwiftUI Navigation ͷ၆ᛌ > Fire and forget / State driven Navigation API
52. SwiftUI ͷ Navigation API 
 ʹ͓͚Δ՝୊
53. Navigation API ʹ͓͚Δ՝୊ 1. ભҠઌͷը໘ʹ Binding value Λ౉͢ػߏΛඋ͍͑ͯͳ͍ 2. ঢ়ଶ؅ཧΛෳࡶʹͤ͞Δ API ͕ଘࡏ͍ͯ͠Δ 3. ෳ਺ͷ Navigation Λ؅ཧͩ͢͠ͱແବͳঢ়ଶ͕૿͑Δ SwiftUI ͷ Navigation API ʹ͓͚Δ՝୊
54. Navigation API ʹ͓͚Δ՝୊ 1. ભҠઌͷը໘ʹ Binding value Λ౉͢ػߏΛඋ͍͑ͯͳ͍ 2. ঢ়ଶ؅ཧΛෳࡶʹͤ͞Δ API ͕ଘࡏ͍ͯ͠Δ 3. ෳ਺ͷ Navigation Λ؅ཧͩ͢͠ͱແବͳঢ়ଶ͕૿͑Δ SwiftUI ͷ Navigation API ʹ͓͚Δ՝୊ > ભҠઌͷը໘ʹ Binding value Λ౉͢ػߏΛඋ͍͑ͯͳ͍
55. ભҠઌͷը໘ʹ Binding value Λ౉͢ػߏΛ උ͍͑ͯͳ͍ struct ContentView: View { @State var draft: Post? var body: some View { Button("Edit") { draft = Post() } .sheet(item: $draft) { (draft: Post) in EditPostView(post: draft) } } } struct EditPostView: View { let post: Post var body: some View { ... } } SwiftUI ͷ Navigation API ʹ͓͚Δ՝୊ > ભҠઌͷը໘ʹ Binding value Λ౉͢ػߏΛඋ͍͑ͯͳ͍
56. ભҠઌͷը໘ʹ Binding value Λ౉͢ػߏΛ උ͍͑ͯͳ͍ struct ContentView: View { @State var draft: Post? var body: some View { Button("Edit") { draft = Post() } .sheet(item: $draft) { (draft: Post) in EditPostView(post: draft) } } } struct EditPostView: View { let post: Post var body: some View { ... } } SwiftUI ͷ Navigation API ʹ͓͚Δ՝୊ > ભҠઌͷը໘ʹ Binding value Λ౉͢ػߏΛඋ͍͑ͯͳ͍
57. ભҠઌͷը໘ʹ Binding value Λ౉͢ػߏΛ උ͍͑ͯͳ͍ struct ContentView: View { @State var draft: Post? var body: some View { Button("Edit") { draft = Post() } .sheet(item: $draft) { (draft: Post) in EditPostView(post: draft) } } } struct EditPostView: View { let post: Post var body: some View { ... } } Navigation API ͷ՝୊ʹͲ͏ཱͪ޲͔͏͔ > ભҠઌͷը໘ʹ Binding value Λ౉͢ػߏΛඋ͍͑ͯͳ͍ Binding ValueΛ EditPostViewʹ
 ౉ͤͳ͍ EditPostViewͰͷ มߋ͕ContentView ʹ൓ө͞Εͳ͍
58. Navigation API ʹ͓͚Δ՝୊ 1. ભҠઌͷը໘ʹ Binding value Λ౉͢ػߏΛඋ͍͑ͯͳ͍ 2. ঢ়ଶ؅ཧΛෳࡶʹͤ͞Δ API ͕ଘࡏ͍ͯ͠Δ 3. ෳ਺ͷ Navigation Λ؅ཧͩ͢͠ͱແବͳঢ়ଶ͕૿͑Δ SwiftUI ͷ Navigation API ʹ͓͚Δ՝୊ > ঢ়ଶ؅ཧΛෳࡶʹͤ͞Δ API ͕ଘࡏ͍ͯ͠Δ
59. Deprecated / New Alert API // Deprecated API // Binding<Bool> Λड͚औΔ func alert( isPresented: Binding<Bool>, content: () -> Alert ) -> some View // Binding<Item?> Λड͚औΔ func alert<Item>( item: Binding<Item?>, content: (Item) -> Alert ) -> some View where Item : Identifiable // New API // Binding<Bool> Λड͚औΔ func alert<A>( _ title: Text, isPresented: Binding<Bool>, actions: () -> A ) -> some View where A : View // Binding<Bool> ͱ data Λड͚औΔ func alert<A, T>( _ title: Text, isPresented: Binding<Bool>, presenting data: T?, actions: (T) -> A ) -> some View where A : View SwiftUI ͷ Navigation API ʹ͓͚Δ՝୊ > ঢ়ଶ؅ཧΛෳࡶʹͤ͞Δ API ͕ଘࡏ͍ͯ͠Δ
60. Deprecated / New Alert API // Deprecated API // Binding<Bool> Λड͚औΔ func alert( isPresented: Binding<Bool>, content: () -> Alert ) -> some View // Binding<Item?> Λड͚औΔ func alert<Item>( item: Binding<Item?>, content: (Item) -> Alert ) -> some View where Item : Identifiable // New API // Binding<Bool> Λड͚औΔ func alert<A>( _ title: Text, isPresented: Binding<Bool>, actions: () -> A ) -> some View where A : View // Binding<Bool> ͱ data Λड͚औΔ func alert<A, T>( _ title: Text, isPresented: Binding<Bool>, presenting data: T?, actions: (T) -> A ) -> some View where A : View SwiftUI ͷ Navigation API ʹ͓͚Δ՝୊ > ঢ়ଶ؅ཧΛෳࡶʹͤ͞Δ API ͕ଘࡏ͍ͯ͠Δ
61. Deprecated boolean binding API struct ExampleView: View { @State private var showAlert = false var body: some View { BaseView(...) .alert(isPresented: $showAlert) { Alert(...) } } } SwiftUI ͷ Navigation API ʹ͓͚Δ՝୊ > ঢ়ଶ؅ཧΛෳࡶʹͤ͞Δ API ͕ଘࡏ͍ͯ͠Δ
62. Deprecated / New Alert API // Deprecated API // Binding<Bool> Λड͚औΔ func alert( isPresented: Binding<Bool>, content: () -> Alert ) -> some View // Binding<Item?> Λड͚औΔ func alert<Item>( item: Binding<Item?>, content: (Item) -> Alert ) -> some View where Item : Identifiable // New API // Binding<Bool> Λड͚औΔ func alert<A>( _ title: Text, isPresented: Binding<Bool>, actions: () -> A ) -> some View where A : View // Binding<Bool> ͱ data Λड͚औΔ func alert<A, T>( _ title: Text, isPresented: Binding<Bool>, presenting data: T?, actions: (T) -> A ) -> some View where A : View SwiftUI ͷ Navigation API ʹ͓͚Δ՝୊ > ঢ়ଶ؅ཧΛෳࡶʹͤ͞Δ API ͕ଘࡏ͍ͯ͠Δ
63. Deprecated optional item binding API struct ExampleView: View { @State private var item: Item? var body: some View { BaseView(...) .alert(item: $item) { item in Alert(...) // item Λར༻ͯ͠ alert ΛΧελϚΠζͰ͖Δ } } } SwiftUI ͷ Navigation API ʹ͓͚Δ՝୊ > ঢ়ଶ؅ཧΛෳࡶʹͤ͞Δ API ͕ଘࡏ͍ͯ͠Δ
64. Deprecated / New Alert API // Deprecated API // Binding<Bool> Λड͚औΔ func alert( isPresented: Binding<Bool>, content: () -> Alert ) -> some View // Binding<Item?> Λड͚औΔ func alert<Item>( item: Binding<Item?>, content: (Item) -> Alert ) -> some View where Item : Identifiable // New API // Binding<Bool> Λड͚औΔ func alert<A>( _ title: Text, isPresented: Binding<Bool>, actions: () -> A ) -> some View where A : View // Binding<Bool> ͱ data Λड͚औΔ func alert<A, T>( _ title: Text, isPresented: Binding<Bool>, presenting data: T?, actions: (T) -> A ) -> some View where A : View SwiftUI ͷ Navigation API ʹ͓͚Δ՝୊ > ঢ়ଶ؅ཧΛෳࡶʹͤ͞Δ API ͕ଘࡏ͍ͯ͠Δ
65. New boolean binding API struct ExampleView: View { @State private var showAlert = false var body: some View { BaseView(...) .alert( "Alert title", isPresented: $showAlert, action: { ... } ) } } SwiftUI ͷ Navigation API ʹ͓͚Δ՝୊ > ঢ়ଶ؅ཧΛෳࡶʹͤ͞Δ API ͕ଘࡏ͍ͯ͠Δ
66. Deprecated / New Alert API // Deprecated API // Binding<Bool> Λड͚औΔ func alert( isPresented: Binding<Bool>, content: () -> Alert ) -> some View // Binding<Item?> Λड͚औΔ func alert<Item>( item: Binding<Item?>, content: (Item) -> Alert ) -> some View where Item : Identifiable // New API // Binding<Bool> Λड͚औΔ func alert<A>( _ title: Text, isPresented: Binding<Bool>, actions: () -> A ) -> some View where A : View // Binding<Bool> ͱ data Λड͚औΔ func alert<A, T>( _ title: Text, isPresented: Binding<Bool>, presenting data: T?, actions: (T) -> A ) -> some View where A : View SwiftUI ͷ Navigation API ʹ͓͚Δ՝୊ > ঢ়ଶ؅ཧΛෳࡶʹͤ͞Δ API ͕ଘࡏ͍ͯ͠Δ
67. New boolean binding and optional item API struct ExampleView: View { @State private var showAlert = false @State private var item: Item? var body: some View { BaseView(...) .alert( "Alert title", isPresented: $showAlert, presenting: item action: { item in ... }, message: { item in ... } ) } } SwiftUI ͷ Navigation API ʹ͓͚Δ՝୊ > ঢ়ଶ؅ཧΛෳࡶʹͤ͞Δ API ͕ଘࡏ͍ͯ͠Δ
68. New boolean binding and optional item API struct ExampleView: View { @State private var showAlert = false @State private var item: Item? var body: some View { BaseView(...) .alert( "Alert title", isPresented: $showAlert, presenting: item action: { item in ... }, message: { item in ... } ) } } SwiftUI ͷ Navigation API ʹ͓͚Δ՝୊ > ঢ়ଶ؅ཧΛෳࡶʹͤ͞Δ API ͕ଘࡏ͍ͯ͠Δ 􀁣 showAlert: true item: non null
69. New boolean binding and optional item API struct ExampleView: View { @State private var showAlert = false @State private var item: Item? var body: some View { BaseView(...) .alert( "Alert title", isPresented: $showAlert, presenting: item action: { item in ... }, message: { item in ... } ) } } SwiftUI ͷ Navigation API ʹ͓͚Δ՝୊ > ঢ়ଶ؅ཧΛෳࡶʹͤ͞Δ API ͕ଘࡏ͍ͯ͠Δ 􀁡 showAlert: true item: null
70. New boolean binding and optional item API ͸ 
 ঢ়ଶ؅ཧΛෳࡶʹͤͯ͞͠·͏ • ։ൃऀ͕ҎԼͷঢ়ଶͷ੔߹ੑΛؾʹ͠ͳ͚Ε͹͍͚ͳ͍ͷ͕ਏ͍ • Alert Λදࣔ͢ΔͨΊͷ boolean binding • Alert ͷ಺༰Λ࡞ΔͨΊͷ optional item • Navigation ͕γϯϓϧͳ͏ͪ͸ͦ͜·ͰࠔΒͳ͍͔΋͠Εͳ͍͕ɺ 
 Navigation ͕૿͑Ε͹༰қʹঢ়ଶ؅ཧ΋ෳࡶʹͳͬͯ͠·͏ SwiftUI ͷ Navigation API ʹ͓͚Δ՝୊ > ঢ়ଶ؅ཧΛෳࡶʹͤ͞Δ API ͕ଘࡏ͍ͯ͠Δ
71. Navigation API ʹ͓͚Δ՝୊ 1. ભҠઌͷը໘ʹ Binding value Λ౉͢ػߏΛඋ͍͑ͯͳ͍ 2. ঢ়ଶ؅ཧΛෳࡶʹͤ͞Δ API ͕ଘࡏ͍ͯ͠Δ 3. ෳ਺ͷ Navigation Λ؅ཧͩ͢͠ͱແବͳঢ়ଶ͕૿͑Δ SwiftUI ͷ Navigation API ʹ͓͚Δ՝୊ > ෳ਺ͷ Navigation Λ؅ཧͩ͢͠ͱແବͳঢ়ଶ͕૿͑Δ
72. ෳ਺ͷ Navigation Λ؅ཧͩ͢͠ͱ 
 ແବͳঢ়ଶ͕૿͑Δ struct ContentView: View { @State var draft: Post? @State var settings: Settings? @State var userProfile: Profile? var body: some View { BaseView(...) .sheet(item: self.$draft) { (draft: Post) in EditPostView(post: draft) } .sheet(item: self.$settings) { (settings: Settings) in SettingsView(settings: settings) } .sheet(item: self.$userProfile) { (userProfile: Profile) in UserProfile(profile: userProfile) } } } SwiftUI ͷ Navigation API ʹ͓͚Δ՝୊ > ෳ਺ͷ Navigation Λ؅ཧͩ͢͠ͱແବͳঢ়ଶ͕૿͑Δ
73. ෳ਺ͷ Navigation Λ؅ཧͩ͢͠ͱ 
 ແବͳঢ়ଶ͕૿͑Δ struct ContentView: View { @State var draft: Post? @State var settings: Settings? @State var userProfile: Profile? var body: some View { BaseView(...) .sheet(item: self.$draft) { (draft: Post) in EditPostView(post: draft) } .sheet(item: self.$settings) { (settings: Settings) in SettingsView(settings: settings) } .sheet(item: self.$userProfile) { (userProfile: Profile) in UserProfile(profile: userProfile) } } } SwiftUI ͷ Navigation API ʹ͓͚Δ՝୊ > ෳ਺ͷ Navigation Λ؅ཧͩ͢͠ͱແବͳঢ়ଶ͕૿͑Δ
74. ෳ਺ͷ Navigation Λ؅ཧͩ͢͠ͱ 
 ແବͳঢ়ଶ͕૿͑Δ struct ContentView: View { @State var draft: Post? // null + non null = 2 @State var settings: Settings? // null + non null = 2 @State var userProfile: Profile? // null + non null = 2 var body: some View { BaseView(...) .sheet(item: self.$draft) { (draft: Post) in EditPostView(post: draft) } .sheet(item: self.$settings) { (settings: Settings) in SettingsView(settings: settings) } .sheet(item: self.$userProfile) { (userProfile: Profile) in UserProfile(profile: userProfile) } } } SwiftUI ͷ Navigation API ʹ͓͚Δ՝୊ > ෳ਺ͷ Navigation Λ؅ཧͩ͢͠ͱແବͳঢ়ଶ͕૿͑Δ
75. ༷ʑͳύλʔϯͷঢ়ଶ͕ൃੜͯ͠͠·͏ %SBGU 4FUUJOHT 1SP fi MF ύλʔϯ /VMM /VMM /VMM ύλʔϯ /PO
    OVMM /VMM /VMM ύλʔϯ /VMM /PO
    OVMM /VMM ύλʔϯ /VMM /VMM /PO
    OVMM ύλʔϯ /PO
    OVMM /PO
    OVMM /VMM ύλʔϯ /PO
    OVMM /VMM /PO
    OVMM ύλʔϯ /VMM /PO
    OVMM /PO
    OVMM ύλʔϯ /PO
    OVMM /PO
    OVMM /PO
    OVMM SwiftUI ͷ Navigation API ʹ͓͚Δ՝୊ > ෳ਺ͷ Navigation Λ؅ཧͩ͢͠ͱແବͳঢ়ଶ͕૿͑Δ
76. ༷ʑͳύλʔϯͷঢ়ଶ͕ൃੜͯ͠͠·͏ %SBGU 4FUUJOHT 1SP fi MF ύλʔϯ /VMM /VMM /VMM ύλʔϯ /PO
    OVMM /VMM /VMM ύλʔϯ /VMM /PO
    OVMM /VMM ύλʔϯ /VMM /VMM /PO
    OVMM ύλʔϯ /PO
    OVMM /PO
    OVMM /VMM ύλʔϯ /PO
    OVMM /VMM /PO
    OVMM ύλʔϯ /VMM /PO
    OVMM /PO
    OVMM ύλʔϯ /PO
    OVMM /PO
    OVMM /PO
    OVMM ༗ޮͳঢ়ଶ͸͜ΕΒͷΈ SwiftUI ͷ Navigation API ʹ͓͚Δ՝୊ > ෳ਺ͷ Navigation Λ؅ཧͩ͢͠ͱແବͳঢ়ଶ͕૿͑Δ
77. Navigation API ͷ՝୊ʹ 
 Ͳ͏ཱͪ޲͔͏͔
78. Navigation API ʹ͓͚Δ՝୊ 1. ભҠઌͷը໘ʹ Binding value Λ౉͢ػߏΛඋ͍͑ͯͳ͍ 2. ঢ়ଶ؅ཧΛෳࡶʹͤ͞Δ API ͕ଘࡏ͍ͯ͠Δ 3. ෳ਺ͷ Navigation Λ؅ཧͩ͢͠ͱແବͳঢ়ଶ͕૿͑Δ Navigation API ͷ՝୊ʹͲ͏ཱͪ޲͔͏͔
79. ʮswiftui-navigation ʯͷΞϓϩʔν 1. ભҠઌͷը໘ʹ Binding value Λ౉͢ػߏΛඋ͍͑ͯͳ͍ • Binding value Λ౉͢͜ͱ͕Ͱ͖Δ API overloads 2. ঢ়ଶ؅ཧΛෳࡶʹͤ͞Δ API ͕ଘࡏ͍ͯ͠Δ • ࠷௿ݶͷঢ়ଶͷΈΛཁٻ͢Δ API overloads 3. ෳ਺ͷ Navigation Λ؅ཧͩ͢͠ͱແବͳঢ়ଶ͕૿͑Δ • Navigation Λ enum Ͱ؅ཧͰ͖ΔΑ͏ʹ͢Δ API overloads Navigation API ͷ՝୊ʹͲ͏ཱͪ޲͔͏͔
80. swiftui-navigation ͱ͸ʁ • SwiftUI ͷ Navigation ʹ focus ͨ͠ Point-Free ੡ͷϥΠϒϥϦ • SwiftUI ͷ Navigation Λར༻͢Δࡍͷ༷ʑͳ՝୊Λղܾ͢ΔͨΊʹҎԼͷ 3 ͭͷπʔϧΛఏڙ͍ͯ͠Δ • Navigation API overloads • ͜ͷޙ࿩͠·͢ • Navigation views ( `IfLet`, `IfCaseLet`, `Switch`/`CaseLet` ) • ໊લͷ௨Γͷ View ܈ɻBinding value Λѻ͑ΔΑ͏ʹઃܭ͞Ε͍ͯΔ • Binding transformations • ಠࣗͷ Navigation Λ࡞Δࡍʹ༗༻ͳπʔϧ Navigation API ͷ՝୊ʹͲ͏ཱͪ޲͔͏͔
81. ʮswiftui-navigation ʯͷΞϓϩʔν 1. ભҠઌͷը໘ʹ Binding value Λ౉͢ػߏΛඋ͍͑ͯͳ͍ • Binding value Λ౉͢͜ͱ͕Ͱ͖Δ API overloads 2. ঢ়ଶ؅ཧΛෳࡶʹͤ͞Δ API ͕ଘࡏ͍ͯ͠Δ • ࠷௿ݶͷঢ়ଶͷΈΛཁٻ͢Δ API overloads 3. ෳ਺ͷ Navigation Λ؅ཧͩ͢͠ͱແବͳঢ়ଶ͕૿͑Δ • Navigation Λ enum Ͱ؅ཧͰ͖ΔΑ͏ʹ͢Δ API overloads Navigation API ͷ՝୊ʹͲ͏ཱͪ޲͔͏͔
82. ʮswiftui-navigation ʯͷΞϓϩʔν 1. ભҠઌͷը໘ʹ Binding value Λ౉͢ػߏΛඋ͍͑ͯͳ͍ • Binding value Λ౉͢͜ͱ͕Ͱ͖Δ API overloads 2. ঢ়ଶ؅ཧΛෳࡶʹͤ͞Δ API ͕ଘࡏ͍ͯ͠Δ • ࠷௿ݶͷঢ়ଶͷΈΛཁٻ͢Δ API overloads 3. ෳ਺ͷ Navigation Λ؅ཧͩ͢͠ͱແବͳঢ়ଶ͕૿͑Δ • Navigation Λ enum Ͱ؅ཧͰ͖ΔΑ͏ʹ͢Δ API overloads Navigation API ͷ՝୊ʹͲ͏ཱͪ޲͔͏͔ > ભҠઌͷը໘ʹ Binding value Λ౉͢ػߏΛඋ͍͑ͯͳ͍ > Binding value Λ౉͢͜ͱ͕Ͱ͖Δ API overloads
83. ભҠઌͷը໘ʹ Binding value Λ౉͢ػߏΛ උ͍͑ͯͳ͍ struct ContentView: View { @State var draft: Post? var body: some View { Button("Edit") { draft = Post() } .sheet(item: $draft) { (draft: Post) in EditPostView(post: draft) } } } struct EditPostView: View { let post: Post var body: some View { ... } } Navigation API ͷ՝୊ʹͲ͏ཱͪ޲͔͏͔ > ભҠઌͷը໘ʹ Binding value Λ౉͢ػߏΛඋ͍͑ͯͳ͍ > Binding value Λ౉͢͜ͱ͕Ͱ͖Δ API overloads
84. ભҠઌͷը໘ʹ Binding value Λ౉͢ػߏΛ උ͍͑ͯͳ͍ struct ContentView: View { @State var draft: Post? var body: some View { Button("Edit") { draft = Post() } .sheet(item: $draft) { (draft: Post) in EditPostView(post: draft) } } } struct EditPostView: View { let post: Post var body: some View { ... } } Navigation API ͷ՝୊ʹͲ͏ཱͪ޲͔͏͔ > ભҠઌͷը໘ʹ Binding value Λ౉͢ػߏΛඋ͍͑ͯͳ͍ > Binding value Λ౉͢͜ͱ͕Ͱ͖Δ API overloads Binding ValueΛ EditPostViewʹ
 ౉ͤͳ͍ EditPostViewͰͷ มߋ͕ContentView ʹ൓ө͞Εͳ͍
85. Binding Value Λ౉ͤΔ sheet API Λߟ͑Δ struct ContentView: View { @State var draft: Post? var body: some View { Button("Edit") { draft = Post() } .sheet(item: $draft) { (draft: Post) in EditPostView(post: draft) } } } struct EditPostView: View { let post: Post var body: some View { ... } } Navigation API ͷ՝୊ʹͲ͏ཱͪ޲͔͏͔ > ભҠઌͷը໘ʹ Binding value Λ౉͢ػߏΛඋ͍͑ͯͳ͍ > Binding value Λ౉͢͜ͱ͕Ͱ͖Δ API overloads
86. Binding Value Λ౉ͤΔ sheet API Λߟ͑Δ struct ContentView: View { @State var draft: Post? var body: some View { Button("Edit") { draft = Post() } .sheet(item: $draft) { ($draft: Post) in // closure ʹ Binding value Λ౉ͤΔΑ͏ʹͳͬͨΒྑͦ͞͏ EditPostView(post: $draft) } } } struct EditPostView: View { @Binding var post: Post var body: some View { ... } } Navigation API ͷ՝୊ʹͲ͏ཱͪ޲͔͏͔ > ભҠઌͷը໘ʹ Binding value Λ౉͢ػߏΛඋ͍͑ͯͳ͍ > Binding value Λ౉͢͜ͱ͕Ͱ͖Δ API overloads
87. Binding Value Λ౉ͤΔ sheet API Λߟ͑Δ extension View { func sheet<Value, Content>( unwrapping optionalValue: Binding<Value?>, @ViewBuilder content: @escaping (Binding<Value>) -> Content ) -> some View where Value: Identifiable, Content: View { self.sheet(item: optionalValue) { _ in // Binding<Value?> Λ Binding<Value> ʹม׵͢Δ value = ??? content(value) } } } Navigation API ͷ՝୊ʹͲ͏ཱͪ޲͔͏͔ > ભҠઌͷը໘ʹ Binding value Λ౉͢ػߏΛඋ͍͑ͯͳ͍ > Binding value Λ౉͢͜ͱ͕Ͱ͖Δ API overloads
88. Binding Value Λ౉ͤΔ sheet API Λߟ͑Δ extension View { func sheet<Value, Content>( unwrapping optionalValue: Binding<Value?>, @ViewBuilder content: @escaping (Binding<Value>) -> Content ) -> some View where Value: Identifiable, Content: View { self.sheet(item: optionalValue) { _ in // Binding<Value?> Λ Binding<Value> ʹม׵͢Δ value = ??? content(value) } } } Navigation API ͷ՝୊ʹͲ͏ཱͪ޲͔͏͔ > ભҠઌͷը໘ʹ Binding value Λ౉͢ػߏΛඋ͍͑ͯͳ͍ > Binding value Λ౉͢͜ͱ͕Ͱ͖Δ API overloads
89. Binding Value Λ౉ͤΔ sheet API Λߟ͑Δ extension View { func sheet<Value, Content>( unwrapping optionalValue: Binding<Value?>, @ViewBuilder content: @escaping (Binding<Value>) -> Content ) -> some View where Value: Identifiable, Content: View { self.sheet(item: optionalValue) { _ in // Binding<Value?> Λ Binding<Value> ʹม׵͢Δ value = ??? content(value) } } } Navigation API ͷ՝୊ʹͲ͏ཱͪ޲͔͏͔ > ભҠઌͷը໘ʹ Binding value Λ౉͢ػߏΛඋ͍͑ͯͳ͍ > Binding value Λ౉͢͜ͱ͕Ͱ͖Δ API overloads
90. Binding Value Λ౉ͤΔ sheet API Λߟ͑Δ extension View { func sheet<Value, Content>( unwrapping optionalValue: Binding<Value?>, @ViewBuilder content: @escaping (Binding<Value>) -> Content ) -> some View where Value: Identifiable, Content: View { self.sheet(item: optionalValue) { _ in // Binding<Value?> Λ Binding<Value> ʹม׵͢Δ value = ??? content(value) } } } Navigation API ͷ՝୊ʹͲ͏ཱͪ޲͔͏͔ > ભҠઌͷը໘ʹ Binding value Λ౉͢ػߏΛඋ͍͑ͯͳ͍ > Binding value Λ౉͢͜ͱ͕Ͱ͖Δ API overloads
91. Binding<Value?> Λ Binding<Value> ʹม׵͢Δ extension Binding { init?(unwrapping binding: Binding<Value?>) { guard let wrappedValue = binding.wrappedValue else { return nil } self.init( get: { wrappedValue }, set: { binding.wrappedValue = $0 } ) } } Navigation API ͷ՝୊ʹͲ͏ཱͪ޲͔͏͔ > ભҠઌͷը໘ʹ Binding value Λ౉͢ػߏΛඋ͍͑ͯͳ͍ > Binding value Λ౉͢͜ͱ͕Ͱ͖Δ API overloads ※ Binding failable initializer ͸ඪ४Ͱଘࡏ͢Δ͕ɺόά͕͋Δ: https://gist.github.com/stephencelis/3a232a1b718bab0ae1127ebd5fcf6f97
92. Binding<Value?> Λ Binding<Value> ʹม׵͢Δ extension Binding { init?(unwrapping binding: Binding<Value?>) { guard let wrappedValue = binding.wrappedValue else { return nil } self.init( get: { wrappedValue }, set: { binding.wrappedValue = $0 } ) } } Navigation API ͷ՝୊ʹͲ͏ཱͪ޲͔͏͔ > ભҠઌͷը໘ʹ Binding value Λ౉͢ػߏΛඋ͍͑ͯͳ͍ > Binding value Λ౉͢͜ͱ͕Ͱ͖Δ API overloads
93. Binding<Value?> Λ Binding<Value> ʹม׵͢Δ extension Binding { init?(unwrapping binding: Binding<Value?>) { guard let wrappedValue = binding.wrappedValue else { return nil } self.init( get: { wrappedValue }, set: { binding.wrappedValue = $0 } ) } } Navigation API ͷ՝୊ʹͲ͏ཱͪ޲͔͏͔ > ભҠઌͷը໘ʹ Binding value Λ౉͢ػߏΛඋ͍͑ͯͳ͍ > Binding value Λ౉͢͜ͱ͕Ͱ͖Δ API overloads
94. Binding<Value?> Λ Binding<Value> ʹม׵͢Δ extension Binding { init?(unwrapping binding: Binding<Value?>) { guard let wrappedValue = binding.wrappedValue else { return nil } self.init( get: { wrappedValue }, set: { binding.wrappedValue = $0 } ) } } Navigation API ͷ՝୊ʹͲ͏ཱͪ޲͔͏͔ > ભҠઌͷը໘ʹ Binding value Λ౉͢ػߏΛඋ͍͑ͯͳ͍ > Binding value Λ౉͢͜ͱ͕Ͱ͖Δ API overloads
95. ࡞੒ͨ͠ init?(unwrapping:) Λద༻͢Δ extension View { func sheet<Value, Content>( unwrapping optionalValue: Binding<Value?>, @ViewBuilder content: @escaping (Binding<Value>) -> Content ) -> some View where Value: Identifiable, Content: View { self.sheet(item: optionalValue) { _ in if let value = Binding(unwrapping: optionalValue) { content(value) } } } } Navigation API ͷ՝୊ʹͲ͏ཱͪ޲͔͏͔ > ભҠઌͷը໘ʹ Binding value Λ౉͢ػߏΛඋ͍͑ͯͳ͍ > Binding value Λ౉͢͜ͱ͕Ͱ͖Δ API overloads
96. ࡞੒ͨ͠ init?(unwrapping:) Λద༻͢Δ extension View { func sheet<Value, Content>( unwrapping optionalValue: Binding<Value?>, @ViewBuilder content: @escaping (Binding<Value>) -> Content ) -> some View where Value: Identifiable, Content: View { self.sheet(item: optionalValue) { _ in if let value = Binding(unwrapping: optionalValue) { content(value) } } } } Navigation API ͷ՝୊ʹͲ͏ཱͪ޲͔͏͔ > ભҠઌͷը໘ʹ Binding value Λ౉͢ػߏΛඋ͍͑ͯͳ͍ > Binding value Λ౉͢͜ͱ͕Ͱ͖Δ API overloads
97. Before / After struct ContentView: View { @State var draft: Post? var body: some View { Button("Edit") { draft = Post() } .sheet(unwrapping: $draft) { $draft in EditPostView(post: $draft) } } } Navigation API ͷ՝୊ʹͲ͏ཱͪ޲͔͏͔ > ભҠઌͷը໘ʹ Binding value Λ౉͢ػߏΛඋ͍͑ͯͳ͍ > Binding value Λ౉͢͜ͱ͕Ͱ͖Δ API overloads struct ContentView: View { @State var draft: Post? var body: some View { Button("Edit") { draft = Post() } .sheet(item: $draft) { draft in EditPostView(post: draft) } } } #FGPSF "GUFS
98. ʮswiftui-navigation ʯͷΞϓϩʔν 1. ભҠઌͷը໘ʹ Binding value Λ౉͢ػߏΛඋ͍͑ͯͳ͍ • Binding value Λ౉͢͜ͱ͕Ͱ͖Δ API overloads 2. ঢ়ଶ؅ཧΛෳࡶʹͤ͞Δ API ͕ଘࡏ͍ͯ͠Δ • ࠷௿ݶͷঢ়ଶͷΈΛཁٻ͢Δ API overloads 3. ෳ਺ͷ Navigation Λ؅ཧͩ͢͠ͱແବͳঢ়ଶ͕૿͑Δ • Navigation Λ enum Ͱ؅ཧͰ͖ΔΑ͏ʹ͢Δ API overloads Navigation API ͷ՝୊ʹͲ͏ཱͪ޲͔͏͔ > ঢ়ଶ؅ཧΛෳࡶʹͤ͞Δ API ͕ଘࡏ͍ͯ͠Δ > ࠷௿ݶͷঢ়ଶͷΈΛཁٻ͢Δ API overloads
99. ঢ়ଶ؅ཧΛෳࡶʹͤ͞Δ API ͕ଘࡏ͍ͯ͠Δ struct ExampleView: View { @State private var showAlert = false @State private var item: Item? var body: some View { BaseView(...) .alert( "Alert title", isPresented: $showAlert, presenting: item action: { item in ... }, message: { item in ... } ) } } Navigation API ͷ՝୊ʹͲ͏ཱͪ޲͔͏͔ > ঢ়ଶ؅ཧΛෳࡶʹͤ͞Δ API ͕ଘࡏ͍ͯ͠Δ > ࠷௿ݶͷঢ়ଶͷΈΛཁٻ͢Δ API overloads
100. ঢ়ଶ؅ཧΛෳࡶʹͤ͞Δ API ͕ଘࡏ͍ͯ͠Δ struct ExampleView: View { @State private var showAlert = false @State private var item: Item? var body: some View { BaseView(...) .alert( "Alert title", isPresented: $showAlert, presenting: item action: { item in ... }, message: { item in ... } ) } } 􀁣 showAlert: true item: non null Navigation API ͷ՝୊ʹͲ͏ཱͪ޲͔͏͔ > ঢ়ଶ؅ཧΛෳࡶʹͤ͞Δ API ͕ଘࡏ͍ͯ͠Δ > ࠷௿ݶͷঢ়ଶͷΈΛཁٻ͢Δ API overloads
101. ঢ়ଶ؅ཧΛෳࡶʹͤ͞Δ API ͕ଘࡏ͍ͯ͠Δ struct ExampleView: View { @State private var showAlert = false @State private var item: Item? var body: some View { BaseView(...) .alert( "Alert title", isPresented: $showAlert, presenting: item action: { item in ... }, message: { item in ... } ) } } 􀁡 showAlert: true item: null Navigation API ͷ՝୊ʹͲ͏ཱͪ޲͔͏͔ > ঢ়ଶ؅ཧΛෳࡶʹͤ͞Δ API ͕ଘࡏ͍ͯ͠Δ > ࠷௿ݶͷঢ়ଶͷΈΛཁٻ͢Δ API overloads
102. ͳͥঢ়ଶ؅ཧΛෳࡶʹ͢Δ API ʹͳ͍ͬͯΔͷ͔ struct ExampleView: View { @State private var showAlert = false @State private var item: Item? var body: some View { BaseView(...) .alert( "Alert title", isPresented: $showAlert, // Alert Λදࣔ͢ΔͨΊͷ Boolean presenting: item // Alert ͷ಺༰ΛΧελϚΠζ͢ΔͨΊͷ optional item action: { item in ... }, message: { item in ... } ) } } Navigation API ͷ՝୊ʹͲ͏ཱͪ޲͔͏͔ > ঢ়ଶ؅ཧΛෳࡶʹͤ͞Δ API ͕ଘࡏ͍ͯ͠Δ > ঢ়ଶ؅ཧΛෳࡶʹͤ͞ͳ͍ API overloads
103. ঢ়ଶ؅ཧΛෳࡶʹͤ͞ͳ͍ API ͸ͲΜͳܗ͔ struct ExampleView: View { @State private var showAlert = false @State private var item: Item? var body: some View { BaseView(...) .alert( title: { item in ... }, presenting: item // optional item ͷΈͰʮalert ͷදࣔ৚݅ʯʮalertͷ಺༰ʯΛܾΊΒΕΔ action: { item in ... }, message: { item in ... } ) } } Navigation API ͷ՝୊ʹͲ͏ཱͪ޲͔͏͔ > ঢ়ଶ؅ཧΛෳࡶʹͤ͞Δ API ͕ଘࡏ͍ͯ͠Δ > ঢ়ଶ؅ཧΛෳࡶʹͤ͞ͳ͍ API overloads
104. Optional item ͷΈΛཁٻ͢Δ API Λߟ͑Δ extension View { func alert<A: View, M: View, T>( title: (T) -> Text, presenting data: Binding<T?>, @ViewBuilder actions: @escaping (T) -> A, @ViewBuilder message: @escaping (T) -> M ) -> some View { self.alert( ???, // alert title isPresented: ???, presenting: data.wrappedValue, actions: actions, message: message ) } } Navigation API ͷ՝୊ʹͲ͏ཱͪ޲͔͏͔ > ঢ়ଶ؅ཧΛෳࡶʹͤ͞Δ API ͕ଘࡏ͍ͯ͠Δ > ঢ়ଶ؅ཧΛෳࡶʹͤ͞ͳ͍ API overloads
105. Optional item ͷΈΛཁٻ͢Δ API Λߟ͑Δ extension View { func alert<A: View, M: View, T>( title: (T) -> Text, presenting data: Binding<T?>, @ViewBuilder actions: @escaping (T) -> A, @ViewBuilder message: @escaping (T) -> M ) -> some View { self.alert( ???, // alert title isPresented: ???, presenting: data.wrappedValue, actions: actions, message: message ) } } Navigation API ͷ՝୊ʹͲ͏ཱͪ޲͔͏͔ > ঢ়ଶ؅ཧΛෳࡶʹͤ͞Δ API ͕ଘࡏ͍ͯ͠Δ > ঢ়ଶ؅ཧΛෳࡶʹͤ͞ͳ͍ API overloads
106. Optional item ͷΈΛཁٻ͢Δ API Λߟ͑Δ extension View { func alert<A: View, M: View, T>( title: (T) -> Text, presenting data: Binding<T?>, @ViewBuilder actions: @escaping (T) -> A, @ViewBuilder message: @escaping (T) -> M ) -> some View { self.alert( ???, // alert title isPresented: ???, presenting: data.wrappedValue, actions: actions, message: message ) } } Navigation API ͷ՝୊ʹͲ͏ཱͪ޲͔͏͔ > ঢ়ଶ؅ཧΛෳࡶʹͤ͞Δ API ͕ଘࡏ͍ͯ͠Δ > ঢ়ଶ؅ཧΛෳࡶʹͤ͞ͳ͍ API overloads
107. Optional item ͷΈΛཁٻ͢Δ API Λߟ͑Δ extension View { func alert<A: View, M: View, T>( title: (T) -> Text, presenting data: Binding<T?>, @ViewBuilder actions: @escaping (T) -> A, @ViewBuilder message: @escaping (T) -> M ) -> some View { self.alert( data.wrappedValue.map(title) ?? Text(""), isPresented: ???, presenting: data.wrappedValue, actions: actions, message: message ) } } Navigation API ͷ՝୊ʹͲ͏ཱͪ޲͔͏͔ > ঢ়ଶ؅ཧΛෳࡶʹͤ͞Δ API ͕ଘࡏ͍ͯ͠Δ > ঢ়ଶ؅ཧΛෳࡶʹͤ͞ͳ͍ API overloads
108. Optional item ͷΈΛཁٻ͢Δ API Λߟ͑Δ extension View { func alert<A: View, M: View, T>( title: (T) -> Text, presenting data: Binding<T?>, @ViewBuilder actions: @escaping (T) -> A, @ViewBuilder message: @escaping (T) -> M ) -> some View { self.alert( data.wrappedValue.map(title) ?? Text(""), isPresented: ???, presenting: data.wrappedValue, actions: actions, message: message ) } } Navigation API ͷ՝୊ʹͲ͏ཱͪ޲͔͏͔ > ঢ়ଶ؅ཧΛෳࡶʹͤ͞Δ API ͕ଘࡏ͍ͯ͠Δ > ঢ়ଶ؅ཧΛෳࡶʹͤ͞ͳ͍ API overloads
109. Optional item ͷΈΛཁٻ͢Δ API Λߟ͑Δ extension View { func alert<A: View, M: View, T>( title: (T) -> Text, presenting data: Binding<T?>, @ViewBuilder actions: @escaping (T) -> A, @ViewBuilder message: @escaping (T) -> M ) -> some View { self.alert( data.wrappedValue.map(title) ?? Text(""), isPresented: ???, // Binding<T?> Λ Binding<Bool> ʹม׵Ͱ͖Δͱྑͦ͞͏ presenting: data.wrappedValue, actions: actions, message: message ) } } Navigation API ͷ՝୊ʹͲ͏ཱͪ޲͔͏͔ > ঢ়ଶ؅ཧΛෳࡶʹͤ͞Δ API ͕ଘࡏ͍ͯ͠Δ > ঢ়ଶ؅ཧΛෳࡶʹͤ͞ͳ͍ API overloads
110. Binding<T?> Λ Binding<Bool> ʹม׵͢Δ extension Binding { func isPresented<Wrapped>() -> Binding<Bool> where Value == Wrapped? { .init( get: { self.wrappedValue != nil }, set: { isPresented in if !isPresented { self.wrappedValue = nil } } ) } } Navigation API ͷ՝୊ʹͲ͏ཱͪ޲͔͏͔ > ঢ়ଶ؅ཧΛෳࡶʹͤ͞Δ API ͕ଘࡏ͍ͯ͠Δ > ঢ়ଶ؅ཧΛෳࡶʹͤ͞ͳ͍ API overloads
111. Binding<T?> Λ Binding<Bool> ʹม׵͢Δ extension Binding { func isPresented<Wrapped>() -> Binding<Bool> where Value == Wrapped? { // Binding<T?> Λม׵͢ΔͨΊͷ΋ͷͳͷͰɺoptional ʹݶఆ .init( get: { self.wrappedValue != nil }, set: { isPresented in if !isPresented { self.wrappedValue = nil } } ) } } Navigation API ͷ՝୊ʹͲ͏ཱͪ޲͔͏͔ > ঢ়ଶ؅ཧΛෳࡶʹͤ͞Δ API ͕ଘࡏ͍ͯ͠Δ > ঢ়ଶ؅ཧΛෳࡶʹͤ͞ͳ͍ API overloads
112. Binding<T?> Λ Binding<Bool> ʹม׵͢Δ extension Binding { func isPresented<Wrapped>() -> Binding<Bool> where Value == Wrapped? { .init( get: { self.wrappedValue != nil }, set: { isPresented in // isPresent ͕ false = alert ͕ด͡ΒΕΔλΠϛϯά // ͦͷࡍ͸ Binding ࣗ਎Λ nil ʹ͢Δ͜ͱͰແޮͳঢ়ଶͷൃੜΛ๷͛Δ if !isPresented { self.wrappedValue = nil } } ) } } Navigation API ͷ՝୊ʹͲ͏ཱͪ޲͔͏͔ > ঢ়ଶ؅ཧΛෳࡶʹͤ͞Δ API ͕ଘࡏ͍ͯ͠Δ > ঢ়ଶ؅ཧΛෳࡶʹͤ͞ͳ͍ API overloads
113. ࡞੒ͨ͠ isPresented Λద༻͢Δ extension View { func alert<A: View, M: View, T>( title: (T) -> Text, presenting data: Binding<T?>, @ViewBuilder actions: @escaping (T) -> A, @ViewBuilder message: @escaping (T) -> M ) -> some View { self.alert( data.wrappedValue.map(title) ?? Text(""), isPresented: data.isPresented(), presenting: data.wrappedValue, actions: actions, message: message ) } } Navigation API ͷ՝୊ʹͲ͏ཱͪ޲͔͏͔ > ঢ়ଶ؅ཧΛෳࡶʹͤ͞Δ API ͕ଘࡏ͍ͯ͠Δ > ঢ়ଶ؅ཧΛෳࡶʹͤ͞ͳ͍ API overloads
114. Before / After struct ExampleView: View { @State private var item: Item? var body: some View { BaseView(...) .alert( Text($0.xxx), presenting: item action: { item in ... }, message: { item in ... } ) } } struct ExampleView: View { @State private var showAlert = false @State private var item: Item? var body: some View { BaseView(...) .alert( "Alert title", isPresented: $showAlert, presenting: item action: { item in ... }, message: { item in ... } ) } } #FGPSF "GUFS Navigation API ͷ՝୊ʹͲ͏ཱͪ޲͔͏͔ > ঢ়ଶ؅ཧΛෳࡶʹͤ͞Δ API ͕ଘࡏ͍ͯ͠Δ > ঢ়ଶ؅ཧΛෳࡶʹͤ͞ͳ͍ API overloads
115. ʮswiftui-navigation ʯͷΞϓϩʔν 1. ભҠઌͷը໘ʹ Binding value Λ౉͢ػߏΛඋ͍͑ͯͳ͍ • Binding value Λ౉͢͜ͱ͕Ͱ͖Δ API overloads 2. ঢ়ଶ؅ཧΛෳࡶʹͤ͞Δ API ͕ଘࡏ͍ͯ͠Δ • ࠷௿ݶͷঢ়ଶͷΈΛཁٻ͢Δ API overloads 3. ෳ਺ͷ Navigation Λ؅ཧͩ͢͠ͱແବͳঢ়ଶ͕૿͑Δ • Navigation Λ enum Ͱ؅ཧͰ͖ΔΑ͏ʹ͢Δ API overloads Navigation API ͷ՝୊ʹͲ͏ཱͪ޲͔͏͔ > ෳ਺ͷ Navigation Λ؅ཧͩ͢͠ͱແବͳঢ়ଶ͕૿͑Δ > Navigation Λ enum Ͱ؅ཧͰ͖ΔΑ͏ʹ͢Δ API overloads
116. ෳ਺ͷ Navigation Λ؅ཧͩ͢͠ͱ 
 ແବͳঢ়ଶ͕૿͑Δ struct ContentView: View { @State var draft: Post? // null + non null = 2 @State var settings: Settings? // null + non null = 2 @State var userProfile: Profile? // null + non null = 2 var body: some View { BaseView(...) .sheet(item: self.$draft) { (draft: Post) in EditPostView(post: draft) } .sheet(item: self.$settings) { (settings: Settings) in SettingsView(settings: settings) } .sheet(item: self.$userProfile) { (userProfile: Profile) in UserProfile(profile: userProfile) } } } Navigation API ͷ՝୊ʹͲ͏ཱͪ޲͔͏͔ > ෳ਺ͷ Navigation Λ؅ཧͩ͢͠ͱແବͳঢ়ଶ͕૿͑Δ > Navigation Λ enum Ͱ؅ཧͰ͖ΔΑ͏ʹ͢Δ API overloads
117. ༷ʑͳύλʔϯͷঢ়ଶ͕ൃੜͯ͠͠·͏ %SBGU 4FUUJOHT 1SP fi MF ύλʔϯ /VMM /VMM /VMM ύλʔϯ /PO
     OVMM /VMM /VMM ύλʔϯ /VMM /PO
     OVMM /VMM ύλʔϯ /VMM /VMM /PO
     OVMM ύλʔϯ /PO
     OVMM /PO
     OVMM /VMM ύλʔϯ /PO
     OVMM /VMM /PO
     OVMM ύλʔϯ /VMM /PO
     OVMM /PO
     OVMM ύλʔϯ /PO
     OVMM /PO
     OVMM /PO
     OVMM Navigation API ͷ՝୊ʹͲ͏ཱͪ޲͔͏͔ > ෳ਺ͷ Navigation Λ؅ཧͩ͢͠ͱແବͳঢ়ଶ͕૿͑Δ > Navigation Λ enum Ͱ؅ཧͰ͖ΔΑ͏ʹ͢Δ API overloads
118. ༷ʑͳύλʔϯͷঢ়ଶ͕ൃੜͯ͠͠·͏ %SBGU 4FUUJOHT 1SP fi MF ύλʔϯ /VMM /VMM /VMM ύλʔϯ /PO
     OVMM /VMM /VMM ύλʔϯ /VMM /PO
     OVMM /VMM ύλʔϯ /VMM /VMM /PO
     OVMM ύλʔϯ /PO
     OVMM /PO
     OVMM /VMM ύλʔϯ /PO
     OVMM /VMM /PO
     OVMM ύλʔϯ /VMM /PO
     OVMM /PO
     OVMM ύλʔϯ /PO
     OVMM /PO
     OVMM /PO
     OVMM ༗ޮͳঢ়ଶ͸͜ΕΒͷΈ Navigation API ͷ՝୊ʹͲ͏ཱͪ޲͔͏͔ > ෳ਺ͷ Navigation Λ؅ཧͩ͢͠ͱແବͳঢ়ଶ͕૿͑Δ > Navigation Λ enum Ͱ؅ཧͰ͖ΔΑ͏ʹ͢Δ API overloads
119. ෳ਺ͷ Navigation ͷ࠷దͳϞσϦϯάΛߟ͑Δ // Navigation ͸ಉ࣌ʹෳ਺ൃੜ͢Δ͜ͱ͕ͳ͍ͨΊɺ΋ͬͱྑ͍ϞσϦϯά͕Ͱ͖ͦ͏ @State var draft: Post? @State var settings: Settings? @State var userProfile: Profile? Navigation API ͷ՝୊ʹͲ͏ཱͪ޲͔͏͔ > ෳ਺ͷ Navigation Λ؅ཧͩ͢͠ͱແବͳঢ়ଶ͕૿͑Δ > Navigation Λ enum Ͱ؅ཧͰ͖ΔΑ͏ʹ͢Δ API overloads
120. ෳ਺ͷ Navigation ͷ࠷దͳϞσϦϯάΛߟ͑Δ // ಉ࣌ʹෳ਺ൃੜ͠ͳ͍ = enum Λ࢖͑Δ @State var draft: Post? @State var settings: Settings? @State var userProfile: Profile? " enum Route { case draft(Post) case settings(Settings) case userProfile(Profile) } Navigation API ͷ՝୊ʹͲ͏ཱͪ޲͔͏͔ > ෳ਺ͷ Navigation Λ؅ཧͩ͢͠ͱແବͳঢ়ଶ͕૿͑Δ > Navigation Λ enum Ͱ؅ཧͰ͖ΔΑ͏ʹ͢Δ API overloads
121. enum Ͱ sheet ͳͲΛදࣔ͠Α͏ͱ͢Δͱʁ struct ExampleView: View { @State private var route: Route? // ... .sheet( item: Binding<Post?>( get: { if case let .draft(post) = route return post } else { return nil } }, set: { post if let post = post { route = .draft(post) } } ) ) { post in /* ... */ } } Navigation API ͷ՝୊ʹͲ͏ཱͪ޲͔͏͔ > ෳ਺ͷ Navigation Λ؅ཧͩ͢͠ͱແବͳঢ়ଶ͕૿͑Δ > Navigation Λ enum Ͱ؅ཧͰ͖ΔΑ͏ʹ͢Δ API overloads
122. enum Ͱ sheet ͳͲΛදࣔ͠Α͏ͱ͢Δͱʁ struct ExampleView: View { @State private var route: Route? // ... .sheet( item: Binding<Post?>( get: { if case let .draft(post) = route return post } else { return nil } }, set: { post if let post = post { route = .draft(post) } } ) ) { post in /* ... */ } } Navigation API ͷ՝୊ʹͲ͏ཱͪ޲͔͏͔ > ෳ਺ͷ Navigation Λ؅ཧͩ͢͠ͱແବͳঢ়ଶ͕૿͑Δ > Navigation Λ enum Ͱ؅ཧͰ͖ΔΑ͏ʹ͢Δ API overloads
123. enum Ͱ sheet ͳͲΛදࣔ͠Α͏ͱ͢Δͱʁ struct ExampleView: View { @State private var route: Route? // ... .sheet( item: Binding<Post?>( get: { if case let .draft(post) = route return post } else { return nil } }, set: { post if let post = post { route = .draft(post) } } ) ) { post in /* ... */ } } Navigation API ͷ՝୊ʹͲ͏ཱͪ޲͔͏͔ > ෳ਺ͷ Navigation Λ؅ཧͩ͢͠ͱແବͳঢ়ଶ͕૿͑Δ > Navigation Λ enum Ͱ؅ཧͰ͖ΔΑ͏ʹ͢Δ API overloads
124. enum Ͱ΋ѻ͍΍͍͢ sheet API Λߟ͑Δ struct ExampleView: View { @State private var route: Route? // ... .sheet( unwrapping: $route, case: ???Route.draft??? ) { $post in // ... } } Navigation API ͷ՝୊ʹͲ͏ཱͪ޲͔͏͔ > ෳ਺ͷ Navigation Λ؅ཧͩ͢͠ͱແବͳঢ়ଶ͕૿͑Δ > Navigation Λ enum Ͱ؅ཧͰ͖ΔΑ͏ʹ͢Δ API overloads
125. enum Ͱ΋ѻ͍΍͍͢ sheet API Λߟ͑Δ struct ExampleView: View { @State private var route: Route? // ... .sheet( unwrapping: $route, // enum ࣗମΛ౉͢ (Binding value) case: ???Route.draft??? ) { $post in // ... } } Navigation API ͷ՝୊ʹͲ͏ཱͪ޲͔͏͔ > ෳ਺ͷ Navigation Λ؅ཧͩ͢͠ͱແବͳঢ়ଶ͕૿͑Δ > Navigation Λ enum Ͱ؅ཧͰ͖ΔΑ͏ʹ͢Δ API overloads
126. enum Ͱ΋ѻ͍΍͍͢ sheet API Λߟ͑Δ struct ExampleView: View { @State private var route: Route? // ... .sheet( unwrapping: $route, case: ???Route.draft??? // ԿΒ͔ͷܗͰ enum ͷಛఆͷ case Λࢦఆ͢Δ ) { $post in // ... } } Navigation API ͷ՝୊ʹͲ͏ཱͪ޲͔͏͔ > ෳ਺ͷ Navigation Λ؅ཧͩ͢͠ͱແବͳঢ়ଶ͕૿͑Δ > Navigation Λ enum Ͱ؅ཧͰ͖ΔΑ͏ʹ͢Δ API overloads
127. enum Ͱ΋ѻ͍΍͍͢ sheet API Λߟ͑Δ struct ExampleView: View { @State private var route: Route? // ... .sheet( unwrapping: $route, case: ???Route.draft??? ) { $post in // Associated value Λ binding value Ͱ౉ͤΔͱͳ͓ྑ͍ // ... } } Navigation API ͷ՝୊ʹͲ͏ཱͪ޲͔͏͔ > ෳ਺ͷ Navigation Λ؅ཧͩ͢͠ͱແବͳঢ়ଶ͕૿͑Δ > Navigation Λ enum Ͱ؅ཧͰ͖ΔΑ͏ʹ͢Δ API overloads
128. enum Ͱ΋ѻ͍΍͍͢ sheet API Λߟ͑Δ extension View<Content> { func sheet( unwrapping: ???, // enum ͷ binding case: ???, // enum ͷಛఆͷ case @ViewBuilder content: @escaping (Binding<???>) -> Content ) -> some View where Content: View { // ... } } Navigation API ͷ՝୊ʹͲ͏ཱͪ޲͔͏͔ > ෳ਺ͷ Navigation Λ؅ཧͩ͢͠ͱແବͳঢ়ଶ͕૿͑Δ > Navigation Λ enum Ͱ؅ཧͰ͖ΔΑ͏ʹ͢Δ API overloads
129. enum Ͱ΋ѻ͍΍͍͢ sheet API Λߟ͑Δ extension View<Content> { func sheet( unwrapping: ???, // enum ͷ binding case: ???, // enum ͷಛఆͷ case @ViewBuilder content: @escaping (Binding<???>) -> Content ) -> some View where Content: View { // ... } } Navigation API ͷ՝୊ʹͲ͏ཱͪ޲͔͏͔ > ෳ਺ͷ Navigation Λ؅ཧͩ͢͠ͱແବͳঢ়ଶ͕૿͑Δ > Navigation Λ enum Ͱ؅ཧͰ͖ΔΑ͏ʹ͢Δ API overloads
130. enum Ͱ΋ѻ͍΍͍͢ sheet API Λߟ͑Δ extension View<Enum, Content> { func sheet( unwrapping: Binding<Enum?>, // enum ͷ binding case: ???, // enum ͷಛఆͷ case @ViewBuilder content: @escaping (Binding<???>) -> Content ) -> some View where Content: View { // ... } } Navigation API ͷ՝୊ʹͲ͏ཱͪ޲͔͏͔ > ෳ਺ͷ Navigation Λ؅ཧͩ͢͠ͱແବͳঢ়ଶ͕૿͑Δ > Navigation Λ enum Ͱ؅ཧͰ͖ΔΑ͏ʹ͢Δ API overloads
131. enum Ͱ΋ѻ͍΍͍͢ sheet API Λߟ͑Δ extension View<Enum, Content> { func sheet( unwrapping: Binding<Enum?>, // enum ͷ binding case: ???, // enum ͷಛఆͷ case @ViewBuilder content: @escaping (Binding<???>) -> Content ) -> some View where Content: View { // ... } } Navigation API ͷ՝୊ʹͲ͏ཱͪ޲͔͏͔ > ෳ਺ͷ Navigation Λ؅ཧͩ͢͠ͱແବͳঢ়ଶ͕૿͑Δ > Navigation Λ enum Ͱ؅ཧͰ͖ΔΑ͏ʹ͢Δ API overloads
132. enum Ͱ΋ѻ͍΍͍͢ sheet API Λߟ͑Δ extension View<Enum, Case, Content> { func sheet( unwrapping: Binding<Enum?>, // enum ͷ binding case: CasePath<Enum, Case>, // enum ͷಛఆͷ case @ViewBuilder content: @escaping (Binding<???>) -> Content ) -> some View where Content: View { // ... } } Navigation API ͷ՝୊ʹͲ͏ཱͪ޲͔͏͔ > ෳ਺ͷ Navigation Λ؅ཧͩ͢͠ͱແବͳঢ়ଶ͕૿͑Δ > Navigation Λ enum Ͱ؅ཧͰ͖ΔΑ͏ʹ͢Δ API overloads
133. enum Ͱ΋ѻ͍΍͍͢ sheet API Λߟ͑Δ extension View<Enum, Case, Content> { func sheet( unwrapping: Binding<Enum?>, // enum ͷ binding case: CasePath<Enum, Case>, // enum ͷಛఆͷ case @ViewBuilder content: @escaping (Binding<???>) -> Content ) -> some View where Content: View { // ... } } Navigation API ͷ՝୊ʹͲ͏ཱͪ޲͔͏͔ > ෳ਺ͷ Navigation Λ؅ཧͩ͢͠ͱແବͳঢ়ଶ͕૿͑Δ > Navigation Λ enum Ͱ؅ཧͰ͖ΔΑ͏ʹ͢Δ API overloads [CasePaths] • https://github.com/pointfreeco/swift-case-paths • struct ʹ͓͚Δ Key Paths ͷ enum ൛ͷΑ͏ͳ΋ͷ • Key Paths ͸ `\User.id` ͱ͢Δ͕ɺCase Paths ͸ `/Kind.animal` • Enum ͔Βʮಛఆͷ Case ͷநग़ʯɾʮಛఆͷ Case ΁ͷ Associated value ͷ
 ຒΊࠐΈʯΛ͍ͨ͠༻్Ͱར༻͍ͯ͠Δ
134. enum Ͱ΋ѻ͍΍͍͢ sheet API Λߟ͑Δ extension View<Enum, Case, Content> { func sheet( unwrapping: Binding<Enum?>, // enum ͷ binding case: CasePath<Enum, Case>, // enum ͷಛఆͷ case @ViewBuilder content: @escaping (Binding<???>) -> Content ) -> some View where Content: View { // ... } } Navigation API ͷ՝୊ʹͲ͏ཱͪ޲͔͏͔ > ෳ਺ͷ Navigation Λ؅ཧͩ͢͠ͱແବͳঢ়ଶ͕૿͑Δ > Navigation Λ enum Ͱ؅ཧͰ͖ΔΑ͏ʹ͢Δ API overloads
135. enum Ͱ΋ѻ͍΍͍͢ sheet API Λߟ͑Δ extension View<Enum, Case, Content> { func sheet( unwrapping: Binding<Enum?>, // enum ͷ binding case: CasePath<Enum, Case>, // enum ͷಛఆͷ case // AssociatedValue ͕͋Ε͹ͦΕΛར༻Ͱ͖Δ (ͳ͚Ε͹ Void) Binding @ViewBuilder content: @escaping (Binding<Case>) -> Content ) -> some View where Content: View { // ... } } Navigation API ͷ՝୊ʹͲ͏ཱͪ޲͔͏͔ > ෳ਺ͷ Navigation Λ؅ཧͩ͢͠ͱແବͳঢ়ଶ͕૿͑Δ > Navigation Λ enum Ͱ؅ཧͰ͖ΔΑ͏ʹ͢Δ API overloads
136. enum Ͱ΋ѻ͍΍͍͢ sheet API Λߟ͑Δ extension View { func sheet<Enum, Case, Content>( unwrapping enum: Binding<Enum?>, case casePath: CasePath<Enum, Case>, @ViewBuilder content: @escaping (Binding<Case>) -> Content ) -> some View where Content: View { self.sheet( isPresented: ??? ) { ??? } } } Navigation API ͷ՝୊ʹͲ͏ཱͪ޲͔͏͔ > ෳ਺ͷ Navigation Λ؅ཧͩ͢͠ͱແବͳঢ়ଶ͕૿͑Δ > Navigation Λ enum Ͱ؅ཧͰ͖ΔΑ͏ʹ͢Δ API overloads
137. enum Ͱ΋ѻ͍΍͍͢ sheet API Λߟ͑Δ extension View { func sheet<Enum, Case, Content>( unwrapping enum: Binding<Enum?>, case casePath: CasePath<Enum, Case>, @ViewBuilder content: @escaping (Binding<Case>) -> Content ) -> some View where Content: View { self.sheet( isPresented: ??? ) { ??? } } } Navigation API ͷ՝୊ʹͲ͏ཱͪ޲͔͏͔ > ෳ਺ͷ Navigation Λ؅ཧͩ͢͠ͱແବͳঢ়ଶ͕૿͑Δ > Navigation Λ enum Ͱ؅ཧͰ͖ΔΑ͏ʹ͢Δ API overloads
138. enum Ͱ΋ѻ͍΍͍͢ sheet API Λߟ͑Δ extension View { func sheet<Enum, Case, Content>( unwrapping enum: Binding<Enum?>, case casePath: CasePath<Enum, Case>, @ViewBuilder content: @escaping (Binding<Case>) -> Content ) -> some View where Content: View { self.sheet( isPresented: `enum`.case(casePath).isPresented() ) { ??? } } } Navigation API ͷ՝୊ʹͲ͏ཱͪ޲͔͏͔ > ෳ਺ͷ Navigation Λ؅ཧͩ͢͠ͱແବͳঢ়ଶ͕૿͑Δ > Navigation Λ enum Ͱ؅ཧͰ͖ΔΑ͏ʹ͢Δ API overloads
139. enum Ͱ΋ѻ͍΍͍͢ sheet API Λߟ͑Δ extension View { func sheet<Enum, Case, Content>( unwrapping enum: Binding<Enum?>, case casePath: CasePath<Enum, Case>, @ViewBuilder content: @escaping (Binding<Case>) -> Content ) -> some View where Content: View { self.sheet( isPresented: `enum`.case(casePath).isPresented() ) { ??? } } } Navigation API ͷ՝୊ʹͲ͏ཱͪ޲͔͏͔ > ෳ਺ͷ Navigation Λ؅ཧͩ͢͠ͱແବͳঢ়ଶ͕૿͑Δ > Navigation Λ enum Ͱ؅ཧͰ͖ΔΑ͏ʹ͢Δ API overloads case(casePath) ͸ Case Paths Λར༻ͨ͠ function Binding<Enum?> ͔Β Binding<Case?> Λநग़͢Δ
140. enum Ͱ΋ѻ͍΍͍͢ sheet API Λߟ͑Δ extension View { func sheet<Enum, Case, Content>( unwrapping enum: Binding<Enum?>, case casePath: CasePath<Enum, Case>, @ViewBuilder content: @escaping (Binding<Case>) -> Content ) -> some View where Content: View { self.sheet( isPresented: `enum`.case(casePath).isPresented() ) { ??? } } } Navigation API ͷ՝୊ʹͲ͏ཱͪ޲͔͏͔ > ෳ਺ͷ Navigation Λ؅ཧͩ͢͠ͱແବͳঢ়ଶ͕૿͑Δ > Navigation Λ enum Ͱ؅ཧͰ͖ΔΑ͏ʹ͢Δ API overloads `enum`.case(casePath) " Binding<Case?> case(casePath) ͸ Case Paths Λར༻ͨ͠ function Binding<Enum?> ͔Β Binding<Case?> Λநग़͢Δ
141. enum Ͱ΋ѻ͍΍͍͢ sheet API Λߟ͑Δ extension View { func sheet<Enum, Case, Content>( unwrapping enum: Binding<Enum?>, case casePath: CasePath<Enum, Case>, @ViewBuilder content: @escaping (Binding<Case>) -> Content ) -> some View where Content: View { self.sheet( isPresented: `enum`.case(casePath).isPresented() ) { ??? } } } Navigation API ͷ՝୊ʹͲ͏ཱͪ޲͔͏͔ > ෳ਺ͷ Navigation Λ؅ཧͩ͢͠ͱແବͳঢ়ଶ͕૿͑Δ > Navigation Λ enum Ͱ؅ཧͰ͖ΔΑ͏ʹ͢Δ API overloads `enum`.case(casePath) " Binding<Case?> `enum`.case(casePath) .isPresented() " Binding<Bool> case(casePath) ͸ Case Paths Λར༻ͨ͠ function Binding<Enum?> ͔Β Binding<Case?> Λநग़͢Δ
142. enum Ͱ΋ѻ͍΍͍͢ sheet API Λߟ͑Δ extension View { func sheet<Enum, Case, Content>( unwrapping enum: Binding<Enum?>, case casePath: CasePath<Enum, Case>, @ViewBuilder content: @escaping (Binding<Case>) -> Content ) -> some View where Content: View { self.sheet( isPresented: `enum`.case(casePath).isPresented() ) { ??? } } } Navigation API ͷ՝୊ʹͲ͏ཱͪ޲͔͏͔ > ෳ਺ͷ Navigation Λ؅ཧͩ͢͠ͱແବͳঢ়ଶ͕૿͑Δ > Navigation Λ enum Ͱ؅ཧͰ͖ΔΑ͏ʹ͢Δ API overloads
143. enum Ͱ΋ѻ͍΍͍͢ sheet API Λߟ͑Δ extension View { func sheet<Enum, Case, Content>( unwrapping enum: Binding<Enum?>, case casePath: CasePath<Enum, Case>, @ViewBuilder content: @escaping (Binding<Case>) -> Content ) -> some View where Content: View { self.sheet( isPresented: `enum`.case(casePath).isPresented() ) { Binding( unwrapping: `enum`.case(casePath) ).map(content) } } } Navigation API ͷ՝୊ʹͲ͏ཱͪ޲͔͏͔ > ෳ਺ͷ Navigation Λ؅ཧͩ͢͠ͱແବͳঢ়ଶ͕૿͑Δ > Navigation Λ enum Ͱ؅ཧͰ͖ΔΑ͏ʹ͢Δ API overloads
144. enum Ͱ΋ѻ͍΍͍͢ sheet API Λߟ͑Δ extension View { func sheet<Enum, Case, Content>( unwrapping enum: Binding<Enum?>, case casePath: CasePath<Enum, Case>, @ViewBuilder content: @escaping (Binding<Case>) -> Content ) -> some View where Content: View { self.sheet( isPresented: `enum`.case(casePath).isPresented() ) { Binding( unwrapping: `enum`.case(casePath) ).map(content) } } } Navigation API ͷ՝୊ʹͲ͏ཱͪ޲͔͏͔ > ෳ਺ͷ Navigation Λ؅ཧͩ͢͠ͱແବͳঢ়ଶ͕૿͑Δ > Navigation Λ enum Ͱ؅ཧͰ͖ΔΑ͏ʹ͢Δ API overloads `enum`.case(casePath) " Binding<Case?>
145. enum Ͱ΋ѻ͍΍͍͢ sheet API Λߟ͑Δ extension View { func sheet<Enum, Case, Content>( unwrapping enum: Binding<Enum?>, case casePath: CasePath<Enum, Case>, @ViewBuilder content: @escaping (Binding<Case>) -> Content ) -> some View where Content: View { self.sheet( isPresented: `enum`.case(casePath).isPresented() ) { Binding( unwrapping: `enum`.case(casePath) ).map(content) } } } Navigation API ͷ՝୊ʹͲ͏ཱͪ޲͔͏͔ > ෳ਺ͷ Navigation Λ؅ཧͩ͢͠ͱແବͳঢ়ଶ͕૿͑Δ > Navigation Λ enum Ͱ؅ཧͰ͖ΔΑ͏ʹ͢Δ API overloads `enum`.case(casePath) " Binding<Case?> Binding(unwrapping:) " Binding<Case> " map
146. Before / After struct ContentView: View { enum Route { // ... } @State var route: Route? var body: some View { BaseView(...) .sheet( unwrapping: $route, case: /Route.draft ) { $draft in EditPostView(post: $draft) } // ... } } struct ContentView: View { @State var draft: Post? @State var settings: Settings? @State var userProfile: Profile? var body: some View { BaseView(...) .sheet(item: self.$draft) { draft in EditPostView(post: draft) } .sheet(item: self.$settings) { settings in SettingsView(settings: settings) } .sheet(item: self.$userProfile) { userProfile in UserProfile(profile: userProfile) } } } #FGPSF "GUFS Navigation API ͷ՝୊ʹͲ͏ཱͪ޲͔͏͔ > ෳ਺ͷ Navigation Λ؅ཧͩ͢͠ͱແବͳঢ়ଶ͕૿͑Δ > Navigation Λ enum Ͱ؅ཧͰ͖ΔΑ͏ʹ͢Δ API overloads
147. Navigation API ͷվળʹΑΔޮՌ • SwiftUI ͷ Navigation API ʹ͓͚Δ ՝୊Λ API overloads ͱ͍͏ 
 γϯϓϧͳํ๏ͰղܾͰ͖ͨ (ϥΠϒϥϦͷ࣮૷͸΋ͬͱચ࿅͞Ε͍ͯ·͢) 1. ભҠઌͷը໘ʹ Binding value Λ౉͢ػߏΛඋ͍͑ͯͳ͍ 2. ঢ়ଶ؅ཧΛෳࡶʹͤ͞Δ API ͕ଘࡏ͍ͯ͠Δ 3. ෳ਺ͷ Navigation Λ؅ཧͩ͢͠ͱແବͳঢ়ଶ͕૿͑Δ • Navigation API ͕ΑΓ҆શͰѻ͍΍͘͢ͳΓɺNavigation ʹؔΘΔঢ়ଶͷ؅ཧ΋ ༰қʹͳΔ Navigation API ͷ՝୊ʹͲ͏ཱͪ޲͔͏͔
148. ·ͱΊ
149. ·ͱΊ • SwiftUI ʹ͸༷ʑͳ Navigation API ͕͋ΓɺOS ͱڞʹܹ͍͠มԽ͕ ͋ͬͨ • େ͖͘ Navigation API ͸ҎԼͷ 2 छྨʹ۠ผͰ͖Δ • Fire and forget API • State driven API
150. ·ͱΊ • SwiftUI ͷ Navigation API ʹ͸ҎԼͷΑ͏ͳ՝୊͕͋ΓɺAPI Λద੾ʹ overload ͯ͠ղܾ͢Δ 
 ʮswiftui-navigationʯͷΑ͏ͳΞϓϩʔν΋ଘࡏ͍ͯ͠Δ • ભҠઌͷը໘ʹ Binding value Λ౉͢ػߏΛඋ͍͑ͯͳ͍ • ঢ়ଶ؅ཧΛෳࡶʹͤ͞Δ API ͕ଘࡏ͍ͯ͠Δ • ෳ਺ͷ Navigation Λ؅ཧͩ͢͠ͱແବͳঢ়ଶ͕૿͑Δ • SwiftUI ͷ Navigation Λਖ਼͘͠ཧղͯ͠؅ཧ͢Ε͹৭ʑͳԸܙ͕͋Δ • Navigation ʹؔΘΔঢ়ଶ؅ཧʹ೰·͞Εͳ͍ • Deep Link ͕༰қʹͳΔɾXcode Previews ΋׆༻͠΍͘͢ͳΔ
151. ࢀߟ • https://www.pointfree.co/collections/swiftui/navigation • https://gist.github.com/mbrandonw/f8b94957031160336cac6898a919cbb7 • https://github.com/pointfreeco/swift-composable-architecture/discussions/1140 • https://developer.apple.com/documentation/swiftui • https://github.com/pointfreeco/swiftui-navigation • https://swiftwithmajid.com/2022/06/15/mastering-navigationstack-in-swiftui-navigator- pattern/ • https://swiftwithmajid.com/2022/06/21/mastering-navigationstack-in-swiftui-deep- linking/
152. After Party iOSDC ͥͻ͝ࢀՃ͍ͩ͘͞ʂ