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Custom bottom sheet for iOS15, iOS16
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| public extension View { | |
| func rSheet<Content: View>( | |
| isPresented: Binding<Bool>, | |
| detents: RPresentationDetent = .medium, | |
| @ViewBuilder content: @escaping () -> Content | |
| ) -> some View { | |
| self.modifier( | |
| RPresentationDetentModifier( | |
| isPresented: isPresented, | |
| detents: detents, | |
| sheetContent: content | |
| ) | |
| ) | |
| } | |
| } | |
| public enum RPresentationDetent { | |
| case medium | |
| case large | |
| case height(CGFloat) | |
| case fraction(CGFloat) | |
| @available(iOS 16.0, *) | |
| fileprivate var newDetents: Set<PresentationDetent> { | |
| switch self { | |
| case .medium: | |
| return [.medium] | |
| case .large: | |
| return [.large] | |
| case .height(let height): | |
| return [.height(height)] | |
| case .fraction(let fraction): | |
| return [.fraction(fraction)] | |
| } | |
| } | |
| fileprivate var oldDetents: [UISheetPresentationController.Detent] { | |
| switch self { | |
| case .medium, .height, .fraction: | |
| return [.medium()] | |
| case .large: | |
| return [.large()] | |
| } | |
| } | |
| } | |
| fileprivate struct RPresentationDetentModifier<SheetContent: View>: ViewModifier { | |
| @Binding private var isPresented: Bool | |
| private let detents: RPresentationDetent | |
| private let sheetContent: () -> SheetContent | |
| init( | |
| isPresented: Binding<Bool>, | |
| detents: RPresentationDetent, | |
| @ViewBuilder sheetContent: @escaping () -> SheetContent | |
| ) { | |
| self._isPresented = isPresented | |
| self.detents = detents | |
| self.sheetContent = sheetContent | |
| } | |
| func body(content: Content) -> some View { | |
| if #available(iOS 16.0, *) { | |
| content | |
| .sheet(isPresented: $isPresented) { | |
| sheetContent() | |
| .presentationDetents(detents.newDetents) | |
| .presentationDragIndicator(.visible) | |
| } | |
| } else { | |
| content | |
| .background( | |
| BottomSheetModifier( | |
| isPresented: $isPresented, | |
| detents: detents.oldDetents, | |
| content: sheetContent | |
| ) | |
| ) | |
| } | |
| } | |
| } | |
| fileprivate struct BottomSheetModifier<Content: View>: UIViewControllerRepresentable { | |
| private let isPresented: Binding<Bool> | |
| private let detents: [UISheetPresentationController.Detent] | |
| private let content: Content | |
| init( | |
| isPresented: Binding<Bool>, | |
| detents: [UISheetPresentationController.Detent], | |
| @ViewBuilder content: @escaping () -> Content | |
| ) { | |
| self.isPresented = isPresented | |
| self.detents = detents | |
| self.content = content() | |
| } | |
| func makeUIViewController(context: Context) -> UIViewController { | |
| UIViewController() | |
| } | |
| func updateUIViewController(_ uiViewController: UIViewController, context: Context) { | |
| if isPresented.wrappedValue { | |
| let hostingController = UIHostingController(rootView: content) | |
| hostingController.modalPresentationStyle = .pageSheet | |
| if let sheet = hostingController.sheetPresentationController { | |
| sheet.detents = detents | |
| sheet.prefersGrabberVisible = true | |
| sheet.prefersEdgeAttachedInCompactHeight = false | |
| sheet.widthFollowsPreferredContentSizeWhenEdgeAttached = false | |
| } | |
| uiViewController.present(hostingController, animated: true) { | |
| isPresented.wrappedValue = false | |
| } | |
| } | |
| } | |
| } |
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