Xcode Previews でUIKitベースのアプリ開発を効率化する - iOSDC Japan 2020

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6*,JUϕʔεͷΞϓϦ։ൃϑϩʔ Start Developing iOS Apps (Swift) https://developer.apple.com/library/archive/referencelibrary/GettingStarted/DevelopiOSAppsSwift/BuildABasicUI.html#//apple_ref/doc/uid/TP40015214-CH5-SW1

6*,JUϕʔεͷΞϓϦ։ൃϑϩʔ TUPSZCPBSEYJC Start Developing iOS Apps (Swift) https://developer.apple.com/library/archive/referencelibrary/GettingStarted/DevelopiOSAppsSwift/BuildABasicUI.html#//apple_ref/doc/uid/TP40015214-CH5-SW1

6*,JUϕʔεͷΞϓϦ։ൃϑϩʔ TUPSZCPBSEYJC 6*7JFX 6*7JFX$POUSPMMFS Start Developing iOS Apps (Swift) https://developer.apple.com/library/archive/referencelibrary/GettingStarted/DevelopiOSAppsSwift/BuildABasicUI.html#//apple_ref/doc/uid/TP40015214-CH5-SW1

6*,JUϕʔεͷΞϓϦ։ൃϑϩʔ 4JNVMBUPSىಈ TUPSZCPBSEYJC 6*7JFX 6*7JFX$POUSPMMFS Start Developing iOS Apps (Swift)
https://developer.apple.com/library/archive/referencelibrary/GettingStarted/DevelopiOSAppsSwift/BuildABasicUI.html#//apple_ref/doc/uid/TP40015214-CH5-SW1

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(Swift) https://developer.apple.com/library/archive/referencelibrary/GettingStarted/DevelopiOSAppsSwift/BuildABasicUI.html#//apple_ref/doc/uid/TP40015214-CH5-SW1

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(Swift) https://developer.apple.com/library/archive/referencelibrary/GettingStarted/DevelopiOSAppsSwift/BuildABasicUI.html#//apple_ref/doc/uid/TP40015214-CH5-SW1 ɾɾ

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UIViewController func makeUIViewController(context: Self.Context) -> Self.UIViewControllerType public protocol UIViewRepresentable : View { associatedtype UIViewType : UIView func makeUIView(context: Self.Context) -> Self.UIViewType w 6*7JFX6*7JFX$POUSPMMFSΛ4XJGU6*ͷ7JFXͱͯ͠ѻ͑Δ

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class HelloView: UIView { private lazy var button: UIButton =
... ྫɿ7JFXͷ࣮૷

... ྫɿ7JFXͷ࣮૷ struct Input { let backgroundColor: UIColor let buttonTitle: String let isButtonEnabled: Bool } func apply(input: Input) { backgroundColor = input.backgroundColor button.setTitle(input.buttonTitle) button.isEnabled = input.isButtonEnabled } }

... ྫɿ7JFXͷ࣮૷ struct Input { let backgroundColor: UIColor let buttonTitle: String let isButtonEnabled: Bool } func apply(input: Input) { backgroundColor = input.backgroundColor button.setTitle(input.buttonTitle) button.isEnabled = input.isButtonEnabled } } IUUQTEFWFMPQFSBQQMFDPNWJEFPTQMBZXXED 4USVDUVSFZPVSBQQGPS4XJGU6*QSFWJFXT 1SFWJFXBCMFͳ7JFX 1SFWJFX 7JFX 7JFX.PEFM "QQ 7JFXͷঢ়ଶΛ஫ೖ 1SFWJFX࣌ ΞϓϦέʔγϣϯ࣮ߦ࣌

final class HelloViewRepresentable: UIViewRepresentable { let input: HelloView.Input init(input: HelloView.Input)
{ self.input = input } func makeUIView(context: Context) -> HelloView { let view = HelloView() view.apply(input: input) return view } ... } ྫɿ6*7JFX3FQSFTFOUBCMFͷ࣮૷

ྫɿ1SFWJFX1SPWJEFSͷ࣮૷ struct HelloView_Preview: PreviewProvider { static var previews: some View
{ Group { HelloViewRepresentable(input: .init( backgroundColor: .white, buttonTitle: "Click Me", isButtonEnabled: true)) HelloViewRepresentable(input: .init( backgroundColor: .yellow, buttonTitle: "Warning", isButtonEnabled: true)) HelloViewRepresentable(input: .init( backgroundColor: .lightGray, buttonTitle: "Disabled", isButtonEnabled: false)) } } }

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+ #if DEBUG && canImport(SwiftUI) import SwiftUI class HelloViewRepresentable: UIViewRepresentable
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iOSDC2019 / ϞόΠϧܾࡁΞϓϦͷ࡞Γํ / How to develop a mobile payment
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// HelloViewPreview.swift struct HelloView_Preview: PreviewProvider { static var previews: some
View { Group { HelloViewRepresentable( input: .init( backgroundColor: .white, buttonTitle: "Click Me", isButtonEnabled: true ) ) } } } // HelloViewPreview.3.preview-thunk.swift extension HelloView_Preview { @_dynamicReplacement(for: previews) private static var __preview__previews: some View { #sourceLocation(file: "/Users/kenmaz/Projects/iOSDC2020App/iOSDC2020App/HelloViewPreview.swift", line: 26) AnyView(__designTimeSelection(Group { __designTimeSelection(HelloViewRepresentable( input: .init( backgroundColor: .white, buttonTitle: __designTimeString( "#3084.[2].[0].property.[0].[0].arg[0].value.[0].arg[0].value.arg[1].value.[0].value", fallback: "Click Me"), isButtonEnabled: __designTimeBoolean( "#3084.[2].[0].property.[0].[0].arg[0].value.[0].arg[0].value.arg[2].value", fallback: true) ) ), "#3084.[2].[0].property.[0].[0].arg[0].value.[0]") }, "#3084.[2].[0].property.[0].[0]")) #sourceLocation() }

View { Group { HelloViewRepresentable( input: .init( backgroundColor: .white, buttonTitle: "Click Me", isButtonEnabled: true ) ) } } } // HelloViewPreview.3.preview-thunk.swift extension HelloView_Preview { @_dynamicReplacement(for: previews) private static var __preview__previews: some View { #sourceLocation(file: "/Users/kenmaz/Projects/iOSDC2020App/iOSDC2020App/HelloViewPreview.swift", line: 26) AnyView(__designTimeSelection(Group { __designTimeSelection(HelloViewRepresentable( input: .init( backgroundColor: .white, buttonTitle: __designTimeString( "#3084.[2].[0].property.[0].[0].arg[0].value.[0].arg[0].value.arg[1].value.[0].value", fallback: "Click Me"), isButtonEnabled: __designTimeBoolean( "#3084.[2].[0].property.[0].[0].arg[0].value.[0].arg[0].value.arg[2].value", fallback: true) ) ), "#3084.[2].[0].property.[0].[0].arg[0].value.[0]") }, "#3084.[2].[0].property.[0].[0]")) #sourceLocation() } ˞EZOBNJDΩʔϫʔυ͸Ϗϧυ࣌ʹ௥Ճ͞ΕΔʢΆ͍ʣ

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View { Group { HelloViewRepresentable( input: .init( backgroundColor: .white, buttonTitle: "Click Me", isButtonEnabled: true ) ) } } } // HelloViewPreview.3.preview-thunk.swift extension HelloView_Preview { @_dynamicReplacement(for: previews) private static var __preview__previews: some View { #sourceLocation(file: "/Users/kenmaz/Projects/iOSDC2020App/iOSDC2020App/HelloViewPreview.swift", line: 26) AnyView(__designTimeSelection(Group { __designTimeSelection(HelloViewRepresentable( input: .init( backgroundColor: .white, buttonTitle: __designTimeString( "#3084.[2].[0].property.[0].[0].arg[0].value.[0].arg[0].value.arg[1].value.[0].value", fallback: "Click Me"), isButtonEnabled: __designTimeBoolean( "#3084.[2].[0].property.[0].[0].arg[0].value.[0].arg[0].value.arg[2].value", fallback: true) ) ), "#3084.[2].[0].property.[0].[0].arg[0].value.[0]") }, "#3084.[2].[0].property.[0].[0]")) #sourceLocation() }

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Xcode Previews でUIKitベースのアプリ開発を効率化する - iOSDC Ja...

Xcode Previews でUIKitベースのアプリ開発を効率化する - iOSDC Japan 2020

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