There's been an article where it says Apple/iOS apps can use the FONT_FAMILY='System' which is defaulted to use San Francisco (SF font). Is this valid Fontfamily to use? If yes, is it open source to use?

I notice that the UIControlEventEditingChanged action will be called twice under Chinese or Japanese when click confirm button of the UITextfield's keyboard. While for other languages such as English it only be called once. Could anyone can explain the detail for it?

I have an app for musicians that works with Songs and Setlists. The logical structure is as follows: A Setlist contains Songs. A Song has Sections, which include Lines (chords & lyrics). I want to view my Setlist in a "Page View," similar to a book where I can swipe through pages. In this view, the Song Sections are wrapped into columns to save screen space. I use a ColumnsLayout to calculate and render the columns, and then a SplitToPages modifier to divide these columns into pages. Problem: The TabView sometimes behaves unexpectedly when a song spans multiple pages during rendering. This results in a transition that is either not smooth or stops between songs. Is there a better way to implement this behavior? Any advice would be greatly appreciated. struct TestPageView: View { struct SongWithSections: Identifiable { var id = UUID() var title: String var section: [String] } var songSetlistSample: [SongWithSections] { var songs: [SongWithSections] = [] //songs for i in 0...3 { var sections: [String] = [] for _ in 0...20 { sections.append(randomSection() + "\n\n") } songs.append(SongWithSections(title: "Song \(i)", section: sections)) } return songs } func randomSection() -> String { var randomSection = "" for _ in 0...15 { randomSection.append(String((0..<Int.random(in: 3..<10)).map{ _ in "abcdefghijklmnopqrstuvwxyz".randomElement()! }) + " ") } return randomSection } var body: some View { GeometryReader {geo in TabView { ForEach(songSetlistSample, id:\.id) {song in let columnWidth = geo.size.width / 2 //song ColumnsLayout(columns: 2, columnWidth: columnWidth, height: geo.size.height) { Text(song.title) .font(.largeTitle) ForEach(song.section, id:\.self) {section in Text(section) } } .modifier(SplitToPages(pageWidth: geo.size.width, id: song.id)) } } .tabViewStyle(PageTabViewStyle(indexDisplayMode: .never)) } } } public struct ColumnsLayout: Layout { var columns: Int let columnWidth: CGFloat let height: CGFloat let spacing: CGFloat = 10 public static var layoutProperties: LayoutProperties { var properties = LayoutProperties() properties.stackOrientation = .vertical return properties } struct Column { var elements: [(index: Int, size: CGSize, yOffset: CGFloat)] = [] var xOffset: CGFloat = .zero var height: CGFloat = .zero } public func sizeThatFits(proposal: ProposedViewSize, subviews: Subviews, cache: inout Cache) -> CGSize { let columns = arrangeColumns(proposal: proposal, subviews: subviews, cache: &cache) guard let maxHeight = columns.map({ $0.height}).max() else {return CGSize.zero} let width = Double(columns.count) * self.columnWidth return CGSize(width: width, height: maxHeight) } public func placeSubviews(in bounds: CGRect, proposal: ProposedViewSize, subviews: Subviews, cache: inout Cache) { let columns = arrangeColumns(proposal: proposal, subviews: subviews, cache: &cache) for column in columns { for element in column.elements { let x: CGFloat = column.xOffset let y: CGFloat = element.yOffset let point = CGPoint(x: x + bounds.minX, y: y + bounds.minY) let proposal = ProposedViewSize(width: self.columnWidth, height: proposal.height ?? 100) subviews[element.index].place(at: point, anchor: .topLeading, proposal: proposal) } } } private func arrangeColumns(proposal: ProposedViewSize, subviews: Subviews, cache: inout Cache) -> [Column] { var currentColumn = Column() var columns = [Column]() var colNumber = 0 var currentY = 0.0 for index in subviews.indices { let proposal = ProposedViewSize(width: self.columnWidth, height: proposal.height ?? 100) let size = subviews[index].sizeThatFits(proposal) let spacing = size.height > 0 ? spacing : 0 if currentY + size.height > height { currentColumn.height = currentY columns.append(currentColumn) colNumber += 1 currentColumn = Column() currentColumn.xOffset = Double(colNumber) * (self.columnWidth) currentY = 0.0 } currentColumn.elements.append((index, size, currentY)) currentY += size.height + spacing } currentColumn.height = currentY columns.append(currentColumn) return columns } } struct SplitToPages: ViewModifier { let pageWidth: CGFloat let id: UUID @State private var pages = 1 func body(content: Content) -> some View { let contentWithGeometry = content .background( GeometryReader { geometryProxy in Color.clear .onChange(of: geometryProxy.size) {newSize in guard newSize.width > 0, pageWidth > 0 else {return} pages = Int(ceil(newSize.width / pageWidth)) } .onAppear { guard geometryProxy.size.width > 0, pageWidth > 0 else {return} pages = Int(ceil(geometryProxy.size.width / pageWidth)) } }) Group { ForEach(0..<pages, id:\.self) {p in ZStack(alignment: .topLeading) { contentWithGeometry .offset(x: -Double(p) * pageWidth, y: 0) .frame(width: pageWidth, alignment: .leading) VStack { Spacer() HStack { Spacer() Text("\(p + 1) of \(pages)") .padding([.leading, .trailing]) } } } .id(id.description + p.description) } } } }

My NavigationSplitView is very simple. The DetailView contains Table populated with data. SideBar populated with items that act as a filter for Table content. If I'm on the SideBar and hit Command-A, I never want to select everything in the sidebar. I always want to select all the content for a detail view. This is how Finder works. I tried to set List(...) { ... } .focusable(false) When I launch the application, Command-A works exactly as I would like. But when I select another "filter" in sidebar with the mouse, the List becomes focusable.

I was trying to show my nextKeyboardButton based on the value of needsInputModeSwitchKey when the viewDidLoad or viewWillAppear. nextKeyboardButton.isHidden = !self.needsInputModeSwitchKey However, my Xcode console always showed this error when I call the key at viewDidLoad, viewWillAppear, viewWillLayoutSubviews and viewDidLayoutSubviews. 2024-10-15 11:50:34.306515+0800 MyKeyboard[6040:25025964] [External] -[UIInputViewController needsInputModeSwitchKey] was called before a connection was established to the host application. This will produce an inaccurate result. Please make sure to call this after your primary view controller has been initialized. The timing of connection was established to the host application. probably not related to the life cycle of extension? What's the right way use this key without warning?

The TextField Shows and When selected opens the keyboard very slowly and before entering text closes immediately with these messages. <PUICQuickboardController: 0x6000029111f0> [0x6000029111f0-1] presentation watchdog expired! <PUICQuickboardController: 0x6000029111f0> [0x6000029111f0-1] is no longer the current presentation, we must have timed out... This App was working fine in Simulator and test devices until recently.

Is it ok to use automaticallyMergesChangesFromParent to true for a managed object context that pins its query generation to current? I have heard from a few sources that in most cases, it’s not recommended to set automaticallyMergesChangesFromParent to true for a managed object context that pins its query generation to current. A source I have seen says: When you pin a managed object context to a specific query generation, you’re explicitly telling the context to view the data as it existed at the time of that generation token (often referred to as a snapshot). This ensures that the context is isolated from any subsequent changes made by other contexts or background tasks. But this may Conflict with Automatic Merging because: The purpose of setting automaticallyMergesChangesFromParent to true is to have the context automatically merge changes from the parent (e.g., background or main context) into itself whenever the parent context saves changes. This behavior conflicts with the concept of a pinned query generation because: • If the context is pinned to current, it should not be concerned with changes that happen after that pinning. • Automatic merging would introduce updates from the parent context that occur after the pinning, thereby violating the “snapshot” nature of the query generation and potentially creating inconsistencies. However, in your own Apple Sample Code Titled "" does use both together. Inside the definition of lazy var persistentContainer: NSPersistentCloudkitContainer the following code is included: // Pin the viewContext to the current generation token, and set it to keep itself up to date with local changes. container.viewContext.automaticallyMergesChangesFromParent = true do { try container.viewContext.setQueryGenerationFrom(.current) } catch { fatalError("###\(#function): Failed to pin viewContext to the current generation:\(error)") }

Hi folks, I’ve been trying to use the new .animation(_:body:) overload without success. I’m attempting to animate multiple properties of a view, each with different animations. This overload seems to be the perfect candidate to achieve that. Here's the code I'm using: struct ContentView: View { @State private var isAnimating = false var body: some View { Text("Hello World") .font(.largeTitle) .animation(.easeOut(duration: 1)) { $0.foregroundStyle(isAnimating ? .red : .blue) } .animation(.linear(duration: 10)) { $0.offset(x: isAnimating ? -100 : 0) } .onAppear { isAnimating = true } } } Pretty straightforward, but I don’t get any animations at all. Of course, I could wrap isAnimating = true in a withAnimation closure, but the WWDC session about those APIs mentions this is not needed. Furthermore, if I do that, the animations I provide in .animation(_:body:) are not being used. I’m really confused by this new API, and I’m starting to think it doesn’t work as advertised.

In my app, most views use List for all tabs. However, due to a custom design, I switched one tab to use ScrollView. I quickly noticed that, unlike List, which applies default padding around the entire view and its items, ScrollView has no such built-in padding. Initially, I assumed that applying a simple .padding(.horizontal) would give the items in ScrollView the same padding as List, but that wasn’t the case. It turns out List adjusts its padding based on screen size. For larger iPhones, like the Plus and Pro Max models, List uses 20px padding, whereas regular-sized iPhones (including the Pro) use 16px. This discrepancy creates an inconsistency when trying to replicate the same padding behavior with ScrollView. Thus, my question how can I apply this conditional padding and/or if there's an API to get the value of the default padding used by List? Also, there’s a difference in padding depending on whether you run the app in the simulator or on a physical device, even if both the simulator and the physical device are the same model and iOS version. iPhone 13 iOS 17.4 Simulator: iPhone 13 iOS 17.4 Physical device: As you can see simulator for iPhone 13 has what I assume 20px paddings for List and List items. So the default padding applied to items in ScrollView is misaligned. iPhone 15 Pro Max iOS 18.0 Physical device and Simulator: In summary, it seems that simulators consistently apply 20px padding for List, while physical devices adjust between 20px and 16px based on screen size. Meanwhile, .padding(.horizontal) always applies 16px and doesn’t dynamically switch to 20px on larger screens. Any thoughts how to work around this? Code example: struct ContentView: View { var body: some View { VStack(spacing: 0) { ScrollView { ForEach(0..<50) { i in Text("Item #\(i)") .padding(.horizontal) .frame(maxWidth: .infinity, alignment: .leading) .background(.orange) .padding(.horizontal) } } List { ForEach(0..<50) { i in Text("Item #\(i)") .background(.green) } } } } }

I use IKSaveOptions to add an accessory view to an NSSavePanel to give the user choice of the image file type (etc) used to save a file. I limit the available file type choices in the accessory's menu by specifying a delegate object that offers the saveOptions:shouldShowUTType: method. Historically, my delegate was called repeatedly (for many file types) so, for those not supported by my code, I was able to omit them from the menu. This is expected behaviour from my interpretation of the documentation for saveOptions:shouldShowUTType: As of Ventura 13.1, the delegate was not called at all; instead, the entire (or at least a long) list of options was offered in the panel. Running the same build of my code on Catalina 10.15.7 still had the historical behaviour. In Sonoma (14.0) the delegate was called exactly once (for JPEG). This behaviour persists in Sequoia 15.1.1 . I have used test code and breakpoints to ensure that I pass a valid reference to my delegate and to inspect when (if) it is called. If there is some (new?) pre-condition for the accessory's use needed on Ventura and later, or a workaround, I would be grateful to be pointed to it.

I am creating an application using PKCanvasview. One function of that app is the ability to trace and retrieve a UITextView that has been addSubviewed to a PKCanvasView. We have confirmed that this functionality works correctly in the simulator and on the actual device on IOS 17.4. This feature did not work correctly on the IOS18 simulator and the actual device. Is this a bug? And if it is normal behavior, is there an alternative?

Since iOS 18, I have gotten user reports that the UIDocumentPickerViewController directoryURL is no longer opening the correct folder. Instead it is just loading the root directory of the Files app/iCloud files. Did something change in iOS 18 that I need to account for? Not all users are having this issue, but some are and they are frustrated because a major feature of my app was to allow users to save files at the ubiquityURL. I use the following to get the path: NSURL *rootDirectory = [[[NSFileManager defaultManager] URLForUbiquityContainerIdentifier:nil] URLByAppendingPathComponent:[NSString stringWithFormat:@"Documents/Photos/%@", folderName]]; Is there something that I need to do differently now in iOS 18 to prevent this from happening?

Hi. I tried to launch SwiftUI preview. But I got an error "AppLaunchTimeoutError" I attach the diagnostics. Does anyone know how to fix this problem? memo.txt

Hi, With UIDocumentPickerViewController, there is a directoryURL property that says we can use to 'specify the starting directory for the document picker'. But it's not clear how to get the directory of a folder in iCloud Drive / Files app. How can I get the 'root' directory for a user's iCloud Drive or Dropbox folder, or the Downloads folder on their device, that I could pass to this directoryURL to make it easier for the user to pick their files? Thanks.

Scenario A SwiftUI view has an overlay with alignment: .top, the content uses .alignmentGuide(.top) {} to adjust the placement. Issue When the content of the overlay is in an if-block, the alignment guide is not adjusted. Example code The example shows 2 views. Not working example, where the content is an if-block. Working example, where the content is not in an if-block Screenshot: https://github.com/simonnickel/FB15248296-SwiftUIAlignmentGuideInOverlayConditional/blob/main/screenshot.png Tested on - Xcode Version 16.0 RC (16A242) on iOS 18.0 Code // Not working .overlay(alignment: .top) { if true { // This line causes .alignmentGuide() to fail Text("Test") .alignmentGuide(.top, computeValue: { dimension in dimension[.bottom] }) } } // Working .overlay(alignment: .top) { Text("Test") .alignmentGuide(.top, computeValue: { dimension in dimension[.bottom] }) } Also created a Feedback: FB15248296 Example Project is here: https://github.com/simonnickel/FB15248296-SwiftUIAlignmentGuideInOverlayConditional/tree/main

I'm encountering an issue in SwiftUI when using a custom font in a TextField with the axis property set to .vertical. Specifically, there is extra space at the bottom of the text in the TextField. This problem does not occur when the axis is set to .horizontal, nor does it occur when using the system font. Here is my code: VStack(spacing: DSConstants.Spacing.spacing16) { Text("Axis: Horizontal") TextField("", text: $text, axis: .horizontal) .font(.custom("MyCustomFont", size: 14)) .frame(minHeight: 44) .focused($editing) .padding(.horizontal, 16) .padding(.vertical, 4) .background( RoundedRectangle(cornerRadius: 16) .fill(Color.white) ) .overlay( RoundedRectangle(cornerRadius: 16) .stroke(editing ? Color.blue : Color.gray, lineWidth: 1) ) .focused($editing) Text("Axis: Vertical") TextField("", text: $text, axis: .vertical) .font(.custom("MyCustomFont", size: 14)) .frame(minHeight: 44) .focused($editing) .padding(.horizontal, 16) .padding(.vertical, 4) .background( RoundedRectangle(cornerRadius: 16) .fill(Color.white) ) .overlay( RoundedRectangle(cornerRadius: 16) .stroke(editing ? Color.blue : Color.gray, lineWidth: 1) ) .focused($editing) } Screen shot: Has anyone else encountered this issue or have any suggestions on how to resolve it?

DeviceActivityReport presents statistics for a device: https://developer.apple.com/documentation/deviceactivity/deviceactivityreport The problem: DeviceActivityReport can present statistics with a delay for a parent device (when DeviceActivityReport is presenting, the DeviceActivityReportExtension is called to process the statistics). One possible solution is to call DeviceActivityReport periodically throughout the day in a child device. However, the app will not be available all day. Is there any way to run DeviceActivityReport in the background? I have tried the following approach, but it didn’t work (DeviceActivityReportExtension didnt call): let hostingController: UIHostingController? = .init(rootView: DeviceActivityReport(context, filter: filter)) hostingController?.view.frame = .init(origin: .zero, size: .init(width: 100, height: 100)) hostingController?.beginAppearanceTransition(true, animated: false) hostingController?.loadView() hostingController?.viewDidLoad() try? await Task.sleep(for: .seconds(0.5)) hostingController?.viewWillAppear(true) hostingController?.viewWillLayoutSubviews() try? await Task.sleep(for: .seconds(0.5)) hostingController?.viewDidAppear(true) try? await Task.sleep(for: .seconds(0.5)) hostingController?.didMove(toParent: rootVC) try? await Task.sleep(for: .seconds(0.5)) hostingController?.viewWillLayoutSubviews() hostingController?.viewDidLayoutSubviews() hostingController?.view.layoutIfNeeded() hostingController?.view.layoutSubviews() hostingController?.endAppearanceTransition() Is there any way to run DeviceActivityReport in the background? (when app is not visible/closed). The main problem is call DeviceActivityReport

So I'm following this code here where I'm using a tableview to display the files contained in a folder along with a group cell to display the name of the current folder: Here's my tableView:isGroupRow method: method which basically turns every row with the folder name into a group row (which is displayed in red in the previous image ). -(BOOL)tableView:(NSTableView *)tableView isGroupRow:(NSInteger)row { DesktopEntity *entity = _tableContents[row]; if ([entity isKindOfClass:[DesktopFolderEntity class]]) { return YES; } return NO; } and here's my tableView:viewForTableColumn:row: method where I have two if statements to decide whether the current row is a group row (meaning it's a folder) or an image: -(NSView*)tableView:(NSTableView *)tableView viewForTableColumn:(NSTableColumn *)tableColumn row:(NSInteger)row; { DesktopEntity *entity = _tableContents[row]; if ([entity isKindOfClass:[DesktopFolderEntity class]]) { NSTextField *groupCell = [tableView makeViewWithIdentifier:@"GroupCell" owner:self]; [groupCell setStringValue: entity.name]; [groupCell setFont:[NSFont fontWithName:@"Arial" size:40]]; [groupCell setTextColor:[NSColor magentaColor]]; return groupCell; } else if ([entity isKindOfClass:[DesktopImageEntity class]]) { NSTableCellView *cellView = [tableView makeViewWithIdentifier:@"ImageCell" owner:self]; [cellView.textField setStringValue: entity.name]; [cellView.textField setFont:[NSFont fontWithName:@"Impact" size:20]]; [cellView.imageView setImage: [(DesktopImageEntity *)entity image]]; return cellView; } return nil; } Now, if the current row is an image, I change its font to Impact with a size of 40 and that works perfectly, the problem here is with the first IF statement, for a group row I wanted to change the font size to arial with a size of 40 with a magenta color but for some reason I can only get the color to work: You can see that my changes to the font size didn't work here, what gives? How can I change the font size for the group row ?

I like how the TabView control looks on the mac and ipad and decided to see if my current code can show the tabs in my multi-platform app just to realize that whenever I click on one of those tabs my macOS app currently crashes every time I press any other tab with the error: Thread 1: "NSToolbar 0x600003de33c0 already contains an item with the identifier com.apple.SwiftUI.navigationSplitView.toggleSidebar. Duplicate items of this type are not allowed." While trying to troubleshoot I noticed several other people have had a similar issue with differing reasons (toolbars and searchers mentioned) all in macOS since upgrading to 15.0: https://forums.developer.apple.com/forums/thread/763829 Minimal Viable Project: to show the issue I commented out most of my code calls hoping to create a project that worked so I could bring my code back in and see if it broke. I still had this issue so I next created a minimal viable example. Here it is: import SwiftUI import SwiftData @Model class Issue { var name: String init(name: String) { self.name = name } } @main struct TestMultiplatformApp: App { var sharedModelContainer: ModelContainer = { let schema = Schema([ Issue.self, ]) let modelConfiguration = ModelConfiguration(schema: schema, isStoredInMemoryOnly: false) do { return try ModelContainer(for: schema, configurations: [modelConfiguration]) } catch { fatalError("Could not create ModelContainer: \(error)") } }() var body: some Scene { WindowGroup { ContentView() } .modelContainer(sharedModelContainer) } } struct ContentView: View { @State var isCompact: Bool = true var body: some View { VStack { if isCompact { EntryTab() } else { EntrySidebar() } Toggle(isOn: $isCompact, label: { Text(isCompact ? "TabView" : "Sidebar") }) .padding(.horizontal, 20) .padding(.bottom, 20) } } } public struct tabControl: Identifiable, Hashable, Sendable { public static func == (lhs: tabControl, rhs: tabControl) -> Bool { lhs.id < rhs.id } public var id: Int // Tab Number public var displayName: String public init(id: Int, displayName: String) { self.id = id self.displayName = displayName } } struct EntryTab: View { let entryTabs = [ tabControl(id: 0, displayName: "row 0"), tabControl(id: 1, displayName: "row 1"), tabControl(id: 2, displayName: "row 2"), tabControl(id: 3, displayName: "row 3") ] @State private var selectedTab: Int = 0 var body: some View { TabView(selection: $selectedTab) { ForEach(entryTabs) { tabCtrl in NavigationSplitView { Text("Selected tab is \(selectedTab)") } detail: { Text("Choose item from sidebar... in future this would be content") } .tabItem { Text(tabCtrl.displayName) } .tag(tabCtrl.id) } } } } struct EntrySidebar: View { @State private var selectedTabID: Int? let entryTabs = [ tabControl(id: 0, displayName: "row 0"), tabControl(id: 1, displayName: "row 1"), tabControl(id: 2, displayName: "row 2"), tabControl(id: 3, displayName: "row 3") ] var body: some View { NavigationSplitView(sidebar: { List(entryTabs, id:\.id, selection: $selectedTabID) { thisItem in Text(thisItem.displayName) } }, content: { Text("Hi selected tab: \(String(describing: selectedTabID))") }, detail: { Text("Choose item from sidebar... in future this would be content") }) .onAppear() { // Set the selected tab selectedTabID = 1 } } }

When I try to install cocoapods I get this error: [!] Oh no, an error occurred. Search for existing GitHub issues similar to yours: https://github.com/CocoaPods/CocoaPods/search?q=dlopen%28%2FLibrary%2FRuby%2FGems%2F2.6.0%2Fgems%2Fffi-1.12.2%2Flib%2Fffi_c.bundle%2C+0x0009%29%3A+tried%3A+%27%2FLibrary%2FRuby%2FGems%2F2.6.0%2Fgems%2Fffi-1.12.2%2Flib%2Fffi_c.bundle%27+%28mach-o+file%2C+but+is+an+incompatible+architecture+%28have+%27x86_64%27%2C+need+%27arm64e%27+or+%27arm64%27%29%29%2C+%27%2FSystem%2FVolumes%2FPreboot%2FCryptexes%2FOS%2FLibrary%2FRuby%2FGems%2F2.6.0%2Fgems%2Fffi-1.12.2%2Flib%2Fffi_c.bundle%27+%28no+such+file%29%2C+%27%2FLibrary%2FRuby%2FGems%2F2.6.0%2Fgems%2Fffi-1.12.2%2Flib%2Fffi_c.bundle%27+%28mach-o+file%2C+but+is+an+incompatible+architecture+%28have+%27x86_64%27%2C+need+%27arm64e%27+or+%27arm64%27%29%29+-+%2FLibrary%2FRuby%2FGems%2F2.6.0%2Fgems%2Fffi-1.12.2%2Flib%2Fffi_c.bundle&type=Issues If none exists, create a ticket, with the template displayed above, on: https://github.com/CocoaPods/CocoaPods/issues/new Be sure to first read the contributing guide for details on how to properly submit a ticket: https://github.com/CocoaPods/CocoaPods/blob/master/CONTRIBUTING.md Don't forget to anonymize any private data! Looking for related issues on cocoapods/cocoapods... Searching for inspections failed: undefined method `map' for nil:NilClass robertsantovasco@iMac L1 demo % I typed "install pod". There's pages of errors above that. Here is my podfile: platform :ios, '9.0' target 'L1 demo' do Comment the next line if you don't want to use dynamic frameworks use_frameworks! pod 'RealmSwift' end Please help. Thank you.