In order to setup a preview, I need to create a Book; to do that, I need to await a function – however, one cannot await inside a Preview: import SwiftUI struct BookView: View { let book: Book var body: some View { VStack { Image(book.thumbnail, scale: 1.0, label: Text(book.title)) } } } #Preview { let url = URL(filePath: "/Users/dan/Documents/Curs confirmare RO.pdf")! // 👇 here, `createBook` should be awaited; but how? let book = createBook(for: url, of: CGSize(width: 254, height: 254), scale: 1.0) BookView(book: book) }

Hello team i notice that we have a problem in our app that every time the user opens a Textfield the app freezes when the keyboard appears, this behavior was tracked down and it's a UI breaking design on a UIView [this view it's expandable and is original size is 80] [when it gets expanded 206.33] this is the view code I change the colors to easy check the other's views created inside private lazy var sharedUIPlaybackView: UIView = { let containerView = UIView().withAutoLayout() let propertySearchCriteria = PropertySearchCriteriaBuilder(hotelSearchParameters: viewModel.hotelSearchParameters).criteria var swiftUIView: SwiftUIView<LodgingPlaybackWrapper>! = nil swiftUIView = SwiftUIView( LodgingPlaybackWrapper(propertySearchCriteria: propertySearchCriteria, playbackUpdateNotificationSender: playbackUpdateNotificationSender, componentHandler: { [weak self] componentId in self?.componentReady(componentId) }), viewDidLayoutSubviewsCallback: { [weak self] in let extraPadding = self?.playbackViewExtraPadding ?? Spacing.spacing8x let newHeight = swiftUIView.frame.size.height + extraPadding // if newHeight != self?.sharedUIPlaybackViewHeightConstraint?.constant { // self?.sharedUIPlaybackViewHeightConstraint?.constant = 206.33 // }else { // self?.sharedUIPlaybackViewHeightConstraint?.constant = 80 // } } ).withAutoLayout().withAccessibilityIdentifier("test") // sharedUIPlaybackViewHeightConstraint = containerView.heightAnchor.constraint(equalToConstant: 0) // sharedUIPlaybackViewHeightConstraint?.isActive = true containerView.backgroundColor = .blue swiftUIView.backgroundColor = .red containerView.addSubview(swiftUIView) containerView.addConstraints([ swiftUIView.topAnchor.constraint(equalTo: containerView.topAnchor, constant: playbackViewTopConstant), swiftUIView.leadingAnchor.constraint(equalTo: containerView.leadingAnchor, constant: Spacing.spacing4x), swiftUIView.trailingAnchor.constraint(equalTo: containerView.trailingAnchor, constant: -Spacing.spacing4x), swiftUIView.bottomAnchor.constraint(equalTo: containerView.bottomAnchor, constant: -Spacing.spacing3x), swiftUIView.heightAnchor.constraint(equalToConstant: 206.33) ]) return containerView }() old devs created this function viewDidLayoutSubviewsCallback to connect user interaction on the wrapper and used on UIKit. this is the part where the math on the function gets weird and messed up the code by crashing the view viewDidLayoutSubviewsCallback: { [weak self] in let extraPadding = self?.playbackViewExtraPadding ?? Spacing.spacing8x let newHeight = swiftUIView.frame.size.height + extraPadding if newHeight != self?.sharedUIPlaybackViewHeightConstraint?.constant { self?.sharedUIPlaybackViewHeightConstraint?.constant = newHeight } } ).withAutoLayout().withAccessibilityIdentifier("test") sharedUIPlaybackViewHeightConstraint = containerView.heightAnchor.constraint(equalToConstant: 0) sharedUIPlaybackViewHeightConstraint?.isActive = true I commented this math because is crashing the app and instead of giving a dynamical height I placed as a constant constraint as default height this is how I solved the problem of the UI, but I still need to update the view each time the user clicks and gets call by the method viewDidLayoutSubviewsCallback what can I do? I tried to add like a conditional on the method if newHeight == 80 { containerView.addConstraints([ swiftUIView.heightAnchor.constraint(equalToConstant: 80.0) ]) containerView.layoutIfNeeded() } else { containerView.addConstraints([ swiftUIView.heightAnchor.constraint(equalToConstant: 206.33) ]) containerView.layoutIfNeeded() } like this but it didn't work [this is how it looks with the constant value of 206.33] [when it gets open looks good]

When I show a window while a sky sphere is shown, the handles to drag/close/resize the window are hidden. The colliders still work, so they are there, but only the visuals are hidden. I already know from another project, that this also happens to volumes. They only appear once you get closer to the window or if the sky sphere gets removed. Is this a known issue or is there a fix for that? .persistentSystemOverlays(.visible)does not fix it Xcode 16.3.0 Beta, visionOS 2.4

This is the complete Playground code: import MapKit import SwiftUI import PlaygroundSupport struct AddressSearchView: View { @State private var region = MKCoordinateRegion( center: CLLocationCoordinate2D(latitude: 37.7749, longitude: -122.4194), span: MKCoordinateSpan(latitudeDelta: 0.01, longitudeDelta: 0.01) ) var body: some View { VStack { Map(position: .constant(MapCameraPosition.region(region))) { } .frame(height: 300) } } } struct AddressSearchView_Previews: PreviewProvider { static var previews: some View { AddressSearchView() } } PlaygroundPage.current.setLiveView(AddressSearchView()) When I try to run this I get this in the debug console: error: Couldn't look up symbols: protocol witness table for _MapKit_SwiftUI.EmptyMapContent : _MapKit_SwiftUI.MapContent in _MapKit_SwiftUI protocol witness table for _MapKit_SwiftUI.EmptyMapContent : _MapKit_SwiftUI.MapContent in _MapKit_SwiftUI protocol witness table for _MapKit_SwiftUI.EmptyMapContent : _MapKit_SwiftUI.MapContent in _MapKit_SwiftUI protocol witness table for _MapKit_SwiftUI.EmptyMapContent : _MapKit_SwiftUI.MapContent in _MapKit_SwiftUI protocol witness table for _MapKit_SwiftUI.EmptyMapContent : _MapKit_SwiftUI.MapContent in _MapKit_SwiftUI protocol witness table for _MapKit_SwiftUI.EmptyMapContent : _MapKit_SwiftUI.MapContent in _MapKit_SwiftUI protocol witness table for _MapKit_SwiftUI.EmptyMapContent : _MapKit_SwiftUI.MapContent in _MapKit_SwiftUI protocol witness table for _MapKit_SwiftUI.EmptyMapContent : _MapKit_SwiftUI.MapContent in _MapKit_SwiftUI protocol witness table for _MapKit_SwiftUI.EmptyMapContent : _MapKit_SwiftUI.MapContent in _MapKit_SwiftUI protocol witness table for _MapKit_SwiftUI.EmptyMapContent : _MapKit_SwiftUI.MapContent in _MapKit_SwiftUI protocol witness table for _MapKit_SwiftUI.EmptyMapContent : _MapKit_SwiftUI.MapContent in _MapKit_SwiftUI Hint: The expression tried to call a function that is not present in the target, perhaps because it was optimized out by the compiler. the preview never shows up. If I use other SwiftUI components and not the map it works fine. What is happening? Playground target is Swift 6 macOS (iOS does the same). Xcode 16.2

Does causing a swiftui view refresh via modifying observed properties while an alert is visible allowed? I am seeing a warning 'Presenting view controller <SwiftUI.PlatformAlertController> from detached view controller is not supported, and may result in incorrect safe area insets and a corrupt root presentation. Make sure <SwiftUI.PlatformAlertController> is in the view hierarchy before presenting from it. Will become a hard exception in a future release.' and the warning 'Attempt to present <SwiftUI.PlatformAlertController> on (from ) while a presentation is in progress'. The second warning occurs more often.

I want to keep the sidebar fixed in NavigationSplitView. I don’t want the user to be able to open or close the sidebar. I removed the toggle button, but I still couldn’t make the sidebar stay fixed. It can still be closed using Cmd + Alt + S or by dragging. What I want is just to disable the resize feature of the sidebar. Isn’t it possible with SwiftUI? NavigationSplitView is kind of blackhole :) LeftSidebarView() .environmentObject(detailView) .toolbar(removing: .sidebarToggle) .navigationSplitViewColumnWidth(240)

I have an app that run Monte Carlo simulations. I run thousands of simulations in the app and a simulation runs can take on the order of 30 seconds to a minute to complete. I would like to have a progress view that tracks the number of simulation runs. How can I implement this in swiftui?

On macOS 15.4 beta 2 (24E5222f), the back button is not visible when navigating from a view with no toolbar to a view with a toolbar button. The back button is visible on macOS 15.3.1 and earlier versions. Also, the toolbar button shown when run on macOS 15.4 beta 2 is truncated. This is how it looks on macOS 15.4 beta 2: And this is how it looks on macOS 15.3.1 and earlier: Feedback ID: FB16743834

My app typically works with very large image files. Having it auto-save on every change is very expensive as most formats cannot be saved incrementally. Is there a way to disable this and force the user to use the Save menu item on OSX, and possibly a Save button on iOS?

My UI is very heavyweight, so I'd like to show the previous versions using a lighter weight - almost like quick look - UI. This would also allow me to 'zoom to fit' so the entire document can be seen. I am using SwiftUI, but I wouldn't mind jumping into AppKit and/or UIKit to implement this.

I have implemented a SwiftUI view containing a grid of TextField elements, where focus moves automatically to the next field upon input. This behavior works well on iOS 16 and 17, maintaining proper focus highlighting when keyboard full access is enabled. However, in iOS 18 and above, the keyboard full access focus behaves differently. It always stays behind the actual focus state, causing a mismatch between the visually highlighted field and the active text input. This leads to usability issues, especially for users navigating with an external keyboard. Below is the SwiftUI code for reference: struct AutoFocusGridTextFieldsView: View { private let fieldCount: Int private let columns: Int @State private var textFields: [String] @FocusState private var focusedField: Int? init(fieldCount: Int = 17, columns: Int = 5) { self.fieldCount = fieldCount self.columns = columns _textFields = State(initialValue: Array(repeating: "", count: fieldCount)) } var body: some View { let rows = (fieldCount / columns) + (fieldCount % columns == 0 ? 0 : 1) VStack(spacing: 10) { ForEach(0..<rows, id: \.self) { row in HStack(spacing: 10) { ForEach(0..<columns, id: \.self) { col in let index = row * columns + col if index < fieldCount { TextField("", text: $textFields[index]) .frame(width: 40, height: 40) .multilineTextAlignment(.center) .textFieldStyle(RoundedBorderTextFieldStyle()) .focused($focusedField, equals: index) .onChange(of: textFields[index]) { newValue in if newValue.count > 1 { textFields[index] = String(newValue.prefix(1)) } if !textFields[index].isEmpty { moveToNextField(from: index) } } } } } } } .padding() .onAppear { focusedField = 0 } } private func moveToNextField(from index: Int) { if index + 1 < fieldCount { focusedField = index + 1 } } } struct AutoFocusGridTextFieldsView_Previews: PreviewProvider { static var previews: some View { AutoFocusGridTextFieldsView(fieldCount: 10, columns: 5) } } Has anyone else encountered this issue with FocusState in iOS 18? I really do believe that this is a bug strictly connected to keyboard navigation since I experienced similar problem also on UIKit equivalent of the view. Any insights or suggestions would be greatly appreciated!

Hello. I use NavigationStack for navigating in app. I have 4 screens - A, B, C, D. In some moment I have path [A, B, C] for NavigationStack. After user did action I should show path [A, B, D]. In other hands I should replace screen C with screen D. struct HomeView: View { @ObservedObject var viewModel: HomeViewModel var body: some View { NavigationStack(path: $viewModel.path) { ContentView() .navigationDestination(for: HomeViewModel.Path.self) { destination in // B, C, D views here... } } .navigationViewStyle(StackNavigationViewStyle()) } } Solution looks like same as for UIKit. I replaced last item in stack. It works, but "push" animation broke. var updatedPath = self.path updatedPath.removeLast() updatedPath.append(newPathItem) self.path = updatedPath I found suggest in Internet that you can remove view from stack after some delay. But it has some magic. For example 1 second delay works properly on iOS 18, but cause crash on iOS 16. 1 millisecond delay works on iOS 16, but sometimes didn't. self.path.append(newPathItem) DispatchQueue.main.asyncAfter(deadline: .now() + .milliseconds(1000)) { UIView.setAnimationsEnabled(false) self.path.remove(at: self.path.count - 2) DispatchQueue.main.asyncAfter(deadline: .now() + .milliseconds(1)) { UIView.setAnimationsEnabled(true) } } It is easy task to replace current top screen in UINavigationController of UIKit. How I can do it properly in SwiftUI and save animation?

Hi everyone, frome time to time I see crash which Im not able to debug, because there is no line of my code where crash occured. This is a crash log what Im getting from time to time of some users. In my device I never get this kind of crash. 0 libswiftCore.dylib 0x1172c _assertionFailure(_:_:flags:) + 208 1 libswiftCore.dylib 0x198624 KEY_TYPE_OF_DICTIONARY_VIOLATES_HASHABLE_REQUIREMENTS(_:) + 2980 2 libswiftCore.dylib 0xdb6c8 specialized _NativeDictionary.uncheckedRemove(at:isUnique:) + 534 3 libswiftCore.dylib 0xb250c Dictionary._Variant.setValue(_:forKey:) + 204 4 libswiftCore.dylib 0x5a620 Dictionary.subscript.setter + 520 5 SwiftUICore 0xf62ec ForEachState.item(at:offset:) + 4340 6 SwiftUICore 0xf5054 ForEachState.forEachItem(from:style:do:) + 1796 7 SwiftUICore 0x2272f8 ForEachState.traitKeys.getter + 84 8 SwiftUICore 0x227298 ForEachList.traitKeys.getter + 24 9 SwiftUICore 0x227008 protocol witness for ViewList.traitKeys.getter in conformance SubgraphList + 76 10 SwiftUICore 0x227008 protocol witness for ViewList.traitKeys.getter in conformance SubgraphList + 76 11 SwiftUICore 0x227008 protocol witness for ViewList.traitKeys.getter in conformance SubgraphList + 76 12 SwiftUICore 0x227008 protocol witness for ViewList.traitKeys.getter in conformance SubgraphList + 76 13 SwiftUICore 0x2271fc DynamicViewList.WrappedList.traitKeys.getter + 88 27 SwiftUICore 0x226d18 specialized static SectionAccumulator.processUnsectionedContent(list:contentSubgraph:) + 84 28 SwiftUI 0x26afe0 ListSectionInfo.init(list:listAttribute:contentSubgraph:) + 132 29 SwiftUI 0x269bb0 UpdateCollectionViewListCoordinator.updateValue() + 1528 30 SwiftUI 0x785d4 partial apply for implicit closure #1 in closure #1 in closure #1 in Attribute.init<A>(_:) + 32 31 AttributeGraph 0xccac AG::Graph::UpdateStack::update() + 540 32 AttributeGraph 0xc870 AG::Graph::update_attribute(AG::data::ptr<AG::Node>, unsigned int) + 424 33 AttributeGraph 0xc444 AG::Subgraph::update(unsigned int) + 848 34 SwiftUICore 0x805a8 GraphHost.flushTransactions() + 860 35 SwiftUI 0x1ac84 closure #1 in _UIHostingView._renderForTest(interval:) + 24 36 SwiftUICore 0x7ffa8 partial apply for closure #1 in ViewGraphDelegate.updateGraph<A>(body:) + 28 37 SwiftUICore 0x7fd6c ViewRendererHost.updateViewGraph<A>(body:) + 120 38 SwiftUICore 0x7fce8 ViewGraphDelegate.updateGraph<A>(body:) + 84 39 SwiftUI 0x3e688 closure #1 in closure #1 in closure #1 in _UIHostingView.beginTransaction() + 172 40 SwiftUI 0x3e5d4 partial apply for closure #1 in closure #1 in closure #1 in _UIHostingView.beginTransaction() + 24 41 SwiftUICore 0x79720 closure #1 in static Update.ensure<A>(_:) + 56 42 SwiftUICore 0x796a4 static Update.ensure<A>(_:) + 100 43 SwiftUI 0x9c808 partial apply for closure #1 in closure #1 in _UIHostingView.beginTransaction() + 80 44 SwiftUICore 0x7f5e0 thunk for @callee_guaranteed () -> () + 28 45 SwiftUICore 0x6161c specialized closure #1 in static NSRunLoop.addObserver(_:) + 144 46 CoreFoundation 0x218a4 __CFRUNLOOP_IS_CALLING_OUT_TO_AN_OBSERVER_CALLBACK_FUNCTION__ + 36 47 CoreFoundation 0x213f8 __CFRunLoopDoObservers + 552 48 CoreFoundation 0x75da8 __CFRunLoopRun + 948 49 CoreFoundation 0xc8284 CFRunLoopRunSpecific + 588 50 GraphicsServices 0x14c0 GSEventRunModal + 164 51 UIKitCore 0x3ee674 -[UIApplication _run] + 816 52 UIKitCore 0x14e88 UIApplicationMain + 340 53 SwiftUI 0x291ef8 closure #1 in KitRendererCommon(_:) + 168 54 SwiftUI 0x291e28 runApp<A>(_:) + 100 55 SwiftUI 0x291d0c static App.main() + 180 56 DholRainbow 0x3019e8 main + 4339145192 (DholRainbowApp.swift:4339145192) 57 ??? 0x1b0bf5de8 (Missing) From Crashlytics I know at least human readable format of this error Fatal error: Duplicate keys of type 'Contact' were found in a Dictionary. This usually means either that the type violates Hashable's requirements, or that members of such a dictionary were mutated after insertion. I 've checked all my parts of code where Im using dictionary. This is a function which creating that particulary dictionary. private func logsByDate() { let groupedByDate = Dictionary(grouping: logs.filter { ($0.remoteParty as? Contact != nil) } ) { $0.date.removeTimeStamp ?? .distantPast }.mapValues { $0.compactMap { $0 } } var dayLogs = [DayLog]() for date in groupedByDate { var contacts = [CallLogContact]() for log in logs.filter({ $0.date.removeTimeStamp ?? .distantPast == date.key }) { if let contact = log.remoteParty as? Contact { if contacts.firstIndex(where: {$0.contact == contact }) == nil { let contactDayLogs = logs.filter({ $0.remoteParty as? Contact == contact && $0.date.removeTimeStamp == date.key}) contacts.append( CallLogContact( contact: contact, logs: contactDayLogs, lastCallLogDate: contactDayLogs.sorted(by: {$0.date > $1.date}).first?.date ?? .distantPast ) ) } } } dayLogs.append(DayLog(date: date.key, contact: contacts)) } DispatchQueue.main.async { self.groupedCallLogs = dayLogs } } This function is called from 3 others functions based on notification from the server in case of new call log, fetched call logs and removed call logs.

My app needs to run on macOS 11+. It has one window of fixed size i.e. it should NOT be resizable. .windowResizability(.contentSize) is only available in macOS 13+. How can window resizability be disabled in macOS 11 and 12 ? I'm running Xcode 16.2 on macOS 15.3.2. Thanks.

Hey, Anyone knows of a possible way to present a PasteButton in a .confirmationDialog on iOS? when I try adding it, it's ignored and not displayed with the rest of the buttons struct MyView: View { @State var flag: Bool = false var body: some View { Text("Some Text") .confirmationDialog("Dialog", isPresented: $flag) { Group { Button("A") {} Button("B") {} PasteButton(payloadType: Data.self) { data in } } } } }

Hello, My goal is to have a NavigationStack whose root view is determined based on its height and width. To do so, I'm using ViewThatFits, which should choose the right view to display. It is working fine, but unexpectedly both views trigger onAppear, whereas only the appropriate one should. This causes the logic in both closures to be executed, which is not intended. The code below demonstrates the problem: struct NavigationStackContentView: View { var body: some View { NavigationStack { ViewThatFits(in: .vertical) { Color.yellow .onAppear { print("|-> on appear: yellow") } .onDisappear { print("|-> on disappear: yellow") } Color.red .frame(width: 1500, height: 1500) .onAppear { print("|-> on appear: red") } .onDisappear { print("|-> on disappear: red") } } } } } this produces: |-> on appear: red |-> on disappear: red |-> on appear: yellow When ViewThatFits is not nested within NavigationStack, the problem does not occur — only the yellow view (in this sample) triggers onAppear, which is the expected behavior. I also checked the macOS version, and the problem does not occur at all, whether within NavigationStack or not. This example is simple and demonstrates that the larger view is the second one. When I switch their places, the problem does not occur because it recognizes that the first view would not fit at this point. However, in my case I will have these views without knowing which one will not fit, so switching their order is not a viable solution if this works without NavigationStack. Am I doing something wrong, or is this a bug? // iOS: 18.3.1 Xcode: 16.2

On iOS 13 I used to use optional @State properties to adapt views. In my case, the presented view would either create a new object (an assignment) if the state that is passed into it is nil, or edit the assignment if an assignment was passed in. This would be done in the action block of a Button and it worked beautifully. On iOS 14 / Xcode 12 this no longer seems to work. Given the following code which creates a new assignment and passes it into the editor view when the user taps a "New Assignment" button, the value of assignment remains nil. Is anyone else experiencing similar behaviour? struct ContentView: View { &#9;&#9;@Environment(\.managedObjectContext) var context &#9;&#9;@State var assignmentEditorIsPresented = false &#9;&#9;@State var assignment: Assignment? = nil &#9;&#9;var Body: some View { &#9;&#9;&#9;&#9;[...] &#9;&#9;&#9;&#9;Button("New Assignment", action: { &#9;&#9;&#9;&#9;&#9;&#9;self.assignment = Assignment(context: context) &#9;&#9;&#9;&#9;&#9;&#9;self.assignmentEditorIsPresented = true &#9;&#9;&#9;&#9;}) &#9;&#9;&#9;&#9;.sheet(isPresented: assignmentEditorIsPresented) { &#9;&#9;&#9;&#9;&#9;&#9;[...] &#9;&#9;&#9;&#9;} &#9;&#9;} } What's even weirder is that I tried adding a random piece of state, an Int, to this view and modifying it right before the assignment state (between lines 9 and 10) and it didn't change either.

Hi all, here's a tiny litte demo app import SwiftUI import MapKit struct MarkerData: Identifiable { var id = UUID() var coordinate: CLLocationCoordinate2D } struct MapView2: View { @State private var markers: [MarkerData] = [] var body: some View { ForEach(markers) { marker in Text("\(marker.coordinate)") } Map { ForEach(markers) { marker in MapMarker(coordinate: marker.coordinate) } } } } The ForEach loop inside the Map gives the error: "Generic parameter 'V' could not be inferred" The one above seems to be fine. What is wrong with the loop inside the map? (I'm working with XCode Version 16.2) Best!

I want to truncate text from head with max 2 lines. I try the following code import SwiftUI struct ContentView: View { @State var content: String = "Hello world! wef wefwwfe wfewe weweffwefwwfwe wfwe" var body: some View { VStack { Text(content) .lineLimit(nil) .truncationMode(.head) .frame(height: 50) Button { content += content } label: { Text("Double") } .buttonStyle(.borderedProminent) } .frame(width: 200, height: 1000) .padding() } } #Preview { ContentView() } It show result like this, this is not what I want.

Hello, I've managed to get rid of these spaces in different ways. Using scrollview, giving negative insets, rewriting modifiers from scratch with plain style etc. But I couldn't solve this with a simple solution. I've read comments from many people experiencing similar problems online. It seems like there isn't a simple modifier to remove these spaces when we use sidebar as the list style in SwiftUI, or I couldn't find the simple solution. I wonder what's the simplest and correct way to reset these spaces? let numbers = Array(1...5) @State private var selected: Int? var body: some View { List(numbers, id: \.self, selection: $selected) { number in HStack { Text("Test") Spacer() } .frame(maxWidth: .infinity, alignment: .leading) } .listStyle(.sidebar) } }