Explore the various UI frameworks available for building app interfaces. Discuss the use cases for different frameworks, share best practices, and get help with specific framework-related questions.

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Occasional PDFKit crash at PageLayout::getWordRange(unsigned long, long)
At this line of code (SketchTextSelectionManager.swift:449), sometimes there will be crashes based on crashlytics reports. let selection = pdfPage.selectionForWord(at: location) This is directly calling into PDFKit's PDFPage#selection method: https://developer.apple.com/documentation/pdfkit/pdfpage/selectionforword(at:) Attached the full stacktrace: Crashed: com.apple.root.user-initiated-qos.cooperative 0 CoreGraphics 0x30c968 PageLayout::getWordRange(unsigned long, long) const + 908 1 CoreGraphics 0x30bbc0 PageLayout::getTextRangeIndex(CGPoint, CGPDFSelectionType, SelectionPrecision) const + 2292 2 CoreGraphics 0x44a53c CGPDFSelectionCreateBetweenPointsWithOptions + 384 3 PDFKit 0x8d5f8 -[PDFPage selectionFromPoint:toPoint:type:] + 168 4 PDFKit 0x92040 -[PDFPage _rvItemAtPoint:] + 64 5 PDFKit 0x91f4c -[PDFPage rvItemAtPoint:] + 84 6 PDFKit 0x8caa8 -[PDFPage selectionForWordAtPoint:] + 40 7 MyApp 0x8420e0 closure #1 in SketchTextSelectionManager.startNewTextSelection(pageId:location:) + 449 (SketchTextSelectionManager.swift:449) 8 MyApp 0x841a70 SketchTextSelectionManager.startNewTextSelection(pageId:location:) + 205 (CurrentNoteManager.swift:205) 9 libswift_Concurrency.dylib 0x61104 swift::runJobInEstablishedExecutorContext(swift::Job*) + 252 10 libswift_Concurrency.dylib 0x63a28 (anonymous namespace)::ProcessOutOfLineJob::process(swift::Job*) + 480 11 libswift_Concurrency.dylib 0x611c4 swift::runJobInEstablishedExecutorContext(swift::Job*) + 444 12 libswift_Concurrency.dylib 0x62514 swift_job_runImpl(swift::Job*, swift::SerialExecutorRef) + 144 13 libdispatch.dylib 0x15d8c _dispatch_root_queue_drain + 392 14 libdispatch.dylib 0x16590 _dispatch_worker_thread2 + 156 15 libsystem_pthread.dylib 0x4c40 _pthread_wqthread + 228 16 libsystem_pthread.dylib 0x1488 start_wqthread + 8 ```
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297
Feb ’25
Why is UIViewController.dismissViewControllerAnimated marked as NS_SWIFT_DISABLE_ASYNC?
In the header for UIViewController, the method dismissViewControllerAnimated is declared like this: - (void)dismissViewControllerAnimated: (BOOL)flag completion: (void (^ __nullable)(void))completion NS_SWIFT_DISABLE_ASYNC API_AVAILABLE(ios(5.0)); NS_SWIFT_DISABLE_ASYNC means that there's no async version exposed like there would normally be of a method that exposes a completion handler. Why is this? And is it unwise / unsafe for me to make my own async version of it using a continuation? My use case is that I want a method that will sequentially dismiss all view controllers presented by a root view controller. So I could have this extension on UIViewController: extension UIViewController { func dismissAsync(animated: Bool) async { await withCheckedContinuation { continuation in self.dismiss(animated: animated) { continuation.resume() } } } func dismissPresentedViewControllers() async { while self.topPresentedViewController != self { await self.topPresentedViewController.dismissAsync(animated: true) } } var topPresentedViewController: UIViewController { var result = self while result.presentedViewController != nil { result = result.presentedViewController! } return result }
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359
Feb ’25
icloud password reset UI does not show buttons.
As can be seen in the screenshot attached, I can not see the options in this window. A prompt window before this also did not show any buttons in the visible space. However, I made a guess and could get to this window by clicking on what I think was "Ok" or something similar. But on this I could not do any action and had to force quit the app.
Topic: UI Frameworks SubTopic: General Tags:
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267
Dec ’24
Playground SwiftUI on iPad wont save .png image using fileExporter.
The SwiftUI Playground code below demonstrates that a .jpeg image can be read and written to the iOS file system. While, a.png image can only be read; the writing request appears to be ignored. Can anyone please tell me how to code to save a .png image using SwiftUI to the iOS file system. Code: import SwiftUI import UniformTypeIdentifiers /* (Copied from Playground 'Help' menu popup.) UIImage Summary An object that manages image data in your app. You use image objects to represent image data of all kinds, and the UIImage class is capable of managing data for all image formats supported by the underlying platform. Image objects are immutable, so you always create them from existing image data, such as an image file on disk or programmatically created image data. An image object may contain a single image or a sequence of images for use in an animation. You can use image objects in several different ways: Assign an image to a UIImageView object to display the image in your interface. Use an image to customize system controls such as buttons, sliders, and segmented controls. Draw an image directly into a view or other graphics context. Pass an image to other APIs that might require image data. Although image objects support all platform-native image formats, it’s recommended that you use PNG or JPEG files for most images in your app. Image objects are optimized for reading and displaying both formats, and those formats offer better performance than most other image formats. Because the PNG format is lossless, it’s especially recommended for the images you use in your app’s interface. Declaration class UIImage : NSObject UIImage Class Reference */ @main struct MyApp: App { var body: some Scene { WindowGroup { ContentView() } } } struct ImageFileDoc: FileDocument { static var readableContentTypes = [UTType.jpeg, UTType.png] static var writableContentTypes = [UTType.jpeg, UTType.png] var someUIImage: UIImage = UIImage() init(initialImage: UIImage = UIImage()) { self.someUIImage = initialImage } init(configuration: ReadConfiguration) throws { guard let data = configuration.file.regularFileContents, let some = UIImage(data: data) else { throw CocoaError(.fileReadCorruptFile) } self.someUIImage = some } func fileWrapper(configuration: WriteConfiguration) throws -> FileWrapper { switch configuration.contentType { case UTType.png: if let data = self.someUIImage.pngData() { return .init(regularFileWithContents: data) } case UTType.jpeg: if let data = self.someUIImage.jpegData(compressionQuality: 1.0) { return .init(regularFileWithContents: data) } default: break } throw CocoaError(.fileWriteUnknown) } } struct ContentView: View { @State private var showingExporterPNG = false @State private var showingExporterJPG = false @State private var showingImporter = false @State var message = "Hello, World!" @State var document: ImageFileDoc = ImageFileDoc() @State var documentExtension = "" var body: some View { VStack { Image(systemName: "globe") .imageScale(.large) .foregroundColor(.accentColor) Text(message) Button("export") { if documentExtension == "png" { message += ", showingExporterPNG is true." showingExporterPNG = true } if documentExtension == "jpeg" { message += ", showingExporterJPG is true." showingExporterJPG = true } } .padding(20) .border(.white, width: 2.0) .disabled(documentExtension == "") Button("import") { showingImporter = true } .padding(20) .border(.white, width: 2.0) Image(uiImage: document.someUIImage) .resizable() .padding() .frame(width: 300, height: 300) } // exporter .png .fileExporter(isPresented: $showingExporterPNG, document: document, contentType: UTType.png) { result in switch result { case .success(let url): message += ", .\(documentExtension) Saved to \(url.lastPathComponent)" case .failure(let error): message += ", Some error saving file: " + error.localizedDescription } } // exporter .jpeg .fileExporter(isPresented: $showingExporterJPG, document: document, contentType: UTType.jpeg) { result in switch result { case .success(let url): message += ", .\(documentExtension) Saved to \(url.lastPathComponent)" case .failure(let error): message += ", Some error saving file: " + error.localizedDescription } } // importer .fileImporter(isPresented: $showingImporter, allowedContentTypes: [.png, .jpeg]) { result in switch result { case .failure(let error): message += ", Some error reading file: " + error.localizedDescription case .success(let url): let gotAccess = url.startAccessingSecurityScopedResource() if !gotAccess { message += ", Unable to Access \(url.lastPathComponent)" return } documentExtension = url.pathExtension guard let fileContents = try? Data(contentsOf: url) else { message += ",\n\nUnable to read file: \(url.lastPathComponent)\n\n" url.stopAccessingSecurityScopedResource() return } url.stopAccessingSecurityScopedResource() message += ", Read file: \(url.lastPathComponent)" message += ", path extension is '\(documentExtension)'." if let uiImage = UIImage(data: fileContents) { self.document.someUIImage = uiImage }else{ message += ", File Content is not an Image." } } } } }
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336
Feb ’25
SwiftUI crashed on iOS16 when use List with .animation
When I use the following code List { ForEach(data.items, id: \.knowledgeInfo.mediaID) { item in SelectableKnowledgeListItem(knowledgeData: item, baseID: data.knowledgeBaseID, isSelectionMode: $isSelectionMode, selectedItems: $selectedItems) .KnowledgeListItemStyle() } // 添加底部加载更多 if !data.isEnd && !isRefreshing { ProgressView() .frame(maxWidth: .infinity, alignment: .center) .onAppear { self.isRefreshing = true manager.getKnowledgeList(knowledgeBaseID: data.knowledgeBaseID, completion: { self.isRefreshing = false }) } } } .animation(.interactiveSpring) .scrollContentBackground(.hidden) .environment(\.defaultMinListHeaderHeight, 7) The number of Views rendered in the List remains unchanged after he adds an item to data.items (data is an ObservedObject, items is Published) at runtime.When I removed .animation(.interactiveSpring), it would be processed normally.And if I perform a delete operation after adding, it will cause a crash. *** Terminating app due to uncaught exception 'NSInternalInconsistencyException', reason: 'Invalid update: invalid number of sections. The number of sections contained in the collection view after the update (11) must be equal to the number of sections contained in the collection view before the update (10), plus or minus the number of sections inserted or deleted (1 inserted, 1 deleted).
Topic: UI Frameworks SubTopic: SwiftUI
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189
Dec ’24
UIColor labelColor in macOS made-for-iPad app is not solid black
When my iOS app runs on macOS in "designed for iPad" mode, the system foreground colour RGBA values seem strange. Looking at [UIColor labelColor], [UIColor secondaryLabelColor] etc. on iOS, I see values like these: (Light Mode) // R G B A fg0 = 0 0 0 255 fg1 = 10 10 13 153 fg2 = 10 10 13 76 fg3 = 10 10 13 45 Note in particular that fg0, aka labelColor, is solid black. When I run it on my Mac, the values I see are: // R G B A fg0 = 0 0 0 216 fg1 = 0 0 0 127 fg2 = 0 0 0 66 fg3 = 0 0 0 25 Here, fg0 has alpha = 216. The result is that it looks like a dark grey, on a white background. Of course it's reasonable for macOS to have a different colour palette than iOS - but native macOS apps seem to have solid 100% black as their foreground colour. Do others see this? What should I be doing? Note that I'm getting colour values using UIColor's getRed: blue: green: alpha: method and then using these colour values for some custom GPU drawing. Previously I was using solid black and white, but at some point I updated it to use UIColor in order to respond to light/dark-mode changes.
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428
Dec ’24
Food Truck Sample animation issue from Table Component
Hi! I'm seeing some weird animation issues building the Food Truck sample application.^1 I'm running from macOS 15.4 and Xcode 16.3. I'm building the Food Truck application for macOS. I'm not focusing on iOS for now. The FoodTruckModel adds new Order values with an animation: // FoodTruckModel.swift withAnimation(.spring(response: 0.4, dampingFraction: 1)) { self.orders.append(orderGenerator.generateOrder(number: orders.count + 1, date: .now, generator: &generator)) } This then animates the OrdersTable when new Order values are added. Here is a small change to OrdersTable: // OrdersTable.swift - @State private var sortOrder = [KeyPathComparator(\Order.status, order: .reverse)] + @State private var sortOrder = [KeyPathComparator(\Order.creationDate, order: .reverse)] Running the app now inserts new Order values at the top. The problem is I seem to be seeing some weird animation issues here. It seems that as soon as the new Order comes in there is some kind of weird glitch where it appears as if part the animation is coming from the side instead of down from the top: What's then more weird is that if I seem to affect the state of the Table in any way then the next Order comes in with perfect animation. Scrolling the Table fixes the animation. Changing the creationData sort order from reverse to forward and back to reverse fixes the animation. Any ideas? Is there something about how the Food Truck product is built that would cause this to happen? Is this an underlying issue in the SwiftUI infra?
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59
Apr ’25
Change anchor position of view for the tvOS focus engine
I'm developing a grid of focusable elements in SwiftUI with different sizes for tvOS (similar to a tv channel grid). Because the Focus Engine calculates the next view to focus based on the center of the currently focused view, sometimes it changes focus to an unexpected view. Here's an example: Actual: Expected: Is it possible to customize the anchor point from which the focus engine traces a ray to the next view? I would prefer the leading edge in my case.
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399
Jan ’25
Improving references to localized strings in App Intents
In order to make referencing keys for localized strings a little more reliable, our application references generated constants for localized string keys: This eliminates the potential for developers to misspell a key when referencing a localized strings. And because these constants are automatically generated by the exact same process that provides localized strings for the application, each and every constant is guaranteed to have a localized string associated with it. I’m currently attempting to implement something similar for the localized strings referenced by our new App Intents. Our initial release of App Intent functionality is simply using string literals to reference localized strings: However, I am running into several issues when trying to reference the string keys as a constant. The closest I managed to get was defining the constant as either a LocalizationValue or as a StaticString and referencing the constant while initializing the LocalizedStringResource. With this approach, I see no errors from Xcode until I try and compile. What’s more is that the wording of the error being thrown is quite peculiar: As you can see with the sample code above, I am clearly calling LocalizedStringResource’s initializer directly as Indicated by the error. Is what I’m trying to do even possible with App Intents? From my research, it does look like iOS app localization is moving more towards using string literals for localized strings. Like with String Catalog’s ability to automatically generate entries from strings referenced in UI without the need for a key. However, we’d prefer to use constants if possible for the reasons listed above.
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102
Apr ’25
Bidirectional Text Rendering Issue in Swift UILabel for Arabic
I'm encountering an issue displaying a large HTML string (over 11470 characters) in a UILabel. Specifically, the Arabic text within the string is rendering left-to-right instead of the correct right-to-left direction. I've provided a truncated version of the HTML string and the relevant code snippet below. I've tried setting the UILabel's text alignment to right, but this didn't resolve the issue. Could you please advise on how to resolve this bidirectional text rendering problem? The results of the correct and incorrect approaches are shown in the image below. Here's the relevant Swift code: let labelView: UILabel = { let label = UILabel() label.textAlignment = .right label.translatesAutoresizingMaskIntoConstraints = false label.numberOfLines = 0 label.semanticContentAttribute = .forceRightToLeft label.backgroundColor = .white label.lineBreakMode = .byWordWrapping return label }() //Important!! //It must exceed 11470 characters. let htmlString = """ <p style=\"text-align: center;\"><strong>İSTİÂZE</strong></p> <p>Nahl sûresindeki:</p> <p dir="rtl" lang="ar"> فَاِذَا قَرَاْتَ الْقُرْاٰنَ فَاسْتَعِذْ بِاللّٰهِ مِنَ الشَّيْطَانِ الرَّج۪يمِ </p> <p><strong>“</strong><strong>Kur’an okuyacağın zaman kovulmuş şeytandan hemen Allah’a sığın!</strong><strong>”</strong> (Nahl 16/98) emri gereğince Kur’ân-ı Kerîm okumaya başlarken:</p> <p dir="rtl" lang="ar">اَعُوذُ بِاللّٰهِ مِنَ الشَّيْطَانِ الرَّج۪يمِ</p> <p><em>“Kovulmuş şeytandan Allah’a sığınırım” </em>deriz. Bu sözü söylemeye “istiâze<em>” denilir. “Eûzü”</em>, sığınırım, emân dilerim, yardım taleb ederim, gibi anlamlara gelir. It must exceed 11470 characters.</p> “”” if let data = htmlString.data(using: .utf8) { let options: [NSAttributedString.DocumentReadingOptionKey: Any] = [ .documentType: NSAttributedString.DocumentType.html, .characterEncoding: String.Encoding.utf8.rawValue ] do { let attributedString = try NSAttributedString(data: data, options: options, documentAttributes: nil) labelView.attributedText = attributedString } catch { print("HTML string işlenirken hata oluştu: \(error)") } } I'm using iOS 18.2 and Swift 6. Any suggestions on how to correct the bidirectional text rendering?
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376
Jan ’25
Implement Continuity Markup in Mac app?
Hello, is there a way to implement Continuity Markup in our own apps? (This is what I'm talking about: https://support.apple.com/en-us/102269 , scroll down to "Use Continuity Markup"). Also, why does a QuickLook panel (QLPreviewPanel.shared()) not display the markup options when triggered from my app for png image files in my app's Group Container? Do I need to implement certain NSServicesMenuRequestor methods for that? Sadly, I could not find any docs on that. Thank you, – Matthias
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109
Apr ’25
Data Fetch issue from SensorKit
I want use SensorKit data for research purposes in my current app. I have applied for and received permission from Apple to access SensorKit Data. I have granting all the necessary permissions. But no data retrieved. I am using didCompleteFetch for retrieving data from Sensorkit. CompleteFetch method calls but find the data. Below is my SensorKitManager Code. import SensorKit import Foundation protocol SensorManagerDelegate: AnyObject { func didFetchPhoneUsageReport(_ reports: [SRPhoneUsageReport]) func didFetchAmbientLightSensorData(_ data: [SRAmbientLightSample]) func didFailFetchingData(error: Error) } class SensorManager: NSObject, SRSensorReaderDelegate { private let phoneUsageReader: SRSensorReader private let ambientLightReader: SRSensorReader weak var delegate: SensorManagerDelegate? override init() { self.phoneUsageReader = SRSensorReader(sensor: .phoneUsageReport) self.ambientLightReader = SRSensorReader(sensor: .ambientLightSensor) super.init() self.phoneUsageReader.delegate = self self.ambientLightReader.delegate = self } func requestAuthorization() { let sensors: Set<SRSensor> = [.phoneUsageReport, .ambientLightSensor] guard phoneUsageReader.authorizationStatus != .authorized || ambientLightReader.authorizationStatus != .authorized else { log("Already authorized. Fetching data directly...") fetchSensorData() return } SRSensorReader.requestAuthorization(sensors: sensors) { [weak self] error in DispatchQueue.main.async { if let error = error { self?.log("Authorization failed: \(error.localizedDescription)", isError: true) self?.delegate?.didFailFetchingData(error: error) } else { self?.log("Authorization granted.") self?.fetchSensorData() } } } } func fetchSensorData() { guard let fromDate = Calendar.current.date(byAdding: .day, value: -1, to: Date()) else { log("Failed to calculate 'from' date.", isError: true) return } let fromTime = SRAbsoluteTime.fromCFAbsoluteTime(_cf: fromDate.timeIntervalSinceReferenceDate) let toTime = SRAbsoluteTime.fromCFAbsoluteTime(_cf: Date().timeIntervalSinceReferenceDate) let phoneUsageRequest = SRFetchRequest() phoneUsageRequest.from = fromTime phoneUsageRequest.to = toTime phoneUsageRequest.device = SRDevice.current let ambientLightRequest = SRFetchRequest() ambientLightRequest.from = fromTime ambientLightRequest.to = toTime ambientLightRequest.device = SRDevice.current phoneUsageReader.fetch(phoneUsageRequest) ambientLightReader.fetch(ambientLightRequest) } // ✅ Delegate Methods func sensorReader(_ reader: SRSensorReader, didCompleteFetch fetchRequest: SRFetchRequest) { Task.detached { if reader.sensor == .phoneUsageReport { if let samples = reader.fetch(fetchRequest) as? [SRPhoneUsageReport] { DispatchQueue.main.async { [weak self] in self?.delegate?.didFetchPhoneUsageReport(samples) } } } else if reader.sensor == .ambientLightSensor { if let samples = reader.fetch(fetchRequest) as? [SRAmbientLightSample] { DispatchQueue.main.async { [weak self] in self?.delegate?.didFetchAmbientLightSensorData(samples) } } } } } func sensorReader(_ reader: SRSensorReader, fetching fetchRequest: SRFetchRequest, didFetchResult result: SRFetchResult<AnyObject>) -> Bool { return true } func sensorReader(_ reader: SRSensorReader, fetching fetchRequest: SRFetchRequest, failedWithError error: any Error) { DispatchQueue.main.async { [weak self] in self?.delegate?.didFailFetchingData(error: error) } } // MARK: - Logging Helper private func log(_ message: String, isError: Bool = false) { if isError { print("❌ [SensorManager] \(message)") } else { print("✅ [SensorManager] \(message)") } } } And ViewController import UIKit import SensorKit class ViewController: UIViewController { private var sensorManager: SensorManager! override func viewDidLoad() { super.viewDidLoad() setupSensorManager() } private func setupSensorManager() { sensorManager = SensorManager() sensorManager.delegate = self sensorManager.requestAuthorization() } } // MARK: - SensorManagerDelegate extension ViewController: SensorManagerDelegate { func didFetchPhoneUsageReport(_ reports: [SRPhoneUsageReport]) { for report in reports { print("Total Calls: (report.totalOutgoingCalls + report.totalIncomingCalls)") print("Outgoing Calls: (report.totalOutgoingCalls)") print("Incoming Calls: (report.totalIncomingCalls)") print("Total Call Duration: (report.totalPhoneCallDuration) seconds") } } func didFetchAmbientLightSensorData(_ data: [SRAmbientLightSample]) { for sample in data { print(sample) } } func didFailFetchingData(error: Error) { print("Failed to fetch data: \(error.localizedDescription)") } } Could anyone please assist me in resolving this issue? Any guidance or troubleshooting steps would be greatly appreciated.
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124
Mar ’25
RePlayKit:screen recording method return sampleBuffer is nil
I want record screen in my app,the method startCaptureWithHandler:completionHandler:,the sampleBuffer, It is supposed to exist but it has become nil.Not only that,but there‘s another problem,when I want to stop recording and save the video,I will check [RPScreenRecorder sharedRecorder].recording first, it will be false sometime,that problems are unusual in iOS 18.3.2 iPhoneXs Max,and unexpected,here is my code -(void)startCaptureScreen { NSLog(@"AKA++ startCaptureScreen"); if ([[RPScreenRecorder sharedRecorder] isRecording]) { return; } //屏幕录制 [[RPScreenRecorder sharedRecorder]setMicrophoneEnabled:YES]; NSLog(@"AKA++ MicrophoneEnabled AAAA startCaptureScreen"); [[RPScreenRecorder sharedRecorder]setCameraEnabled:YES]; [[RPScreenRecorder sharedRecorder] startCaptureWithHandler:^(CMSampleBufferRef _Nonnull sampleBuffer, RPSampleBufferType bufferType, NSError * _Nullable error) { if(self.assetWriter == nil){ if (self.AVAssetWriterStatus == 0) { [self setupAssetWriterAndStartWith:sampleBuffer]; } } if (self.AVAssetWriterStatus != 2) { return; } if (error) { // deal with error return; } if (self.assetWriter.status != AVAssetWriterStatusWriting) { [self assetWriterAppendSampleBufferFailWith:bufferType]; return; } if (bufferType == RPSampleBufferTypeVideo) { if(self.assetWriter.status == 0 ||self.assetWriter.status > 2){ } else if(self.videoAssetWriterInput.readyForMoreMediaData == YES){ BOOL success = [self.videoAssetWriterInput appendSampleBuffer:sampleBuffer]; } } if (bufferType == RPSampleBufferTypeAudioMic) { if(self.assetWriter.status == 0 ||self.assetWriter.status > 2){ } else if(self.audioAssetWriterInput.readyForMoreMediaData == YES){ BOOL success = [self.audioAssetWriterInput appendSampleBuffer:sampleBuffer]; } } } completionHandler:^(NSError * _Nullable error) { //deal with error }]; } and than ,when want to save it : -(void)stopRecording { if([[RPScreenRecorder sharedRecorder] isRecording]){ // The problem is sporadic,recording action failed,it makes me confused } [[RPScreenRecorder sharedRecorder] stopCaptureWithHandler:^(NSError * _Nullable error) { if(!error) { //post message } }]; }
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73
Apr ’25
Adding a Label with UIImage and Text to the TabSection Header in tvOS 18+
I've been trying to add a header to the tabSection of the tabview in tvos 18+ . init( @TabContentBuilder<SelectionValue> content: () -> Content, @ViewBuilder header: () -> Header ) where Header : View, Footer == EmptyView Here the ehader clearly conforms to View but i cant quite fit the label with uiimage as the icon into this. This Label when i add it to any other view, the image is in the specified 50 x 50 size but inside header it functions weirdly to be of a huge size. but also to note, if i simply hav an icon here, it is correct. So what is the problem here.. can someone help me? im supposed to add the user profile and name in the header. I dont think there's any other way
Topic: UI Frameworks SubTopic: SwiftUI Tags:
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352
Jan ’25
Loading secondary Icon
I want to add the option to choose an alternative icon inside the app. Is there a way to load an icon asset from within the app? I downloaded Apple’s alternative icon sample, which is supposed to show a list of icons to choose from, but even in the sample, it did not work. So the current solution is to add every alternative icon along with another image asset of the same image to display to the user. This sounds like a waste of bytes. Thank you in advance for any help.
Topic: UI Frameworks SubTopic: General
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68
Mar ’25
Regarding errors with UIToolbar and UIBarButtonItem set to UITextField
I set UIToolbar and UIBarButtonItem to UITextField placed on Xib, but when I run it on iOS18 iPad, the following error is output to Xcode Console, and UIPickerView set to UITextField.inputView is not displayed. Error: this application, or a library it uses, has passed an invalid numeric value (NaN, or not-a-number) to CoreGraphics API and this value is being ignored. Please fix this problem. If you want to see the backtrace, please set CG_NUMERICS_SHOW_BACKTRACE environmental variable. Backtrace: <CGPathAddLineToPoint+71> <+[UIBezierPath _continuousRoundedRectBezierPath:withRoundedCorners:cornerRadii:segments:smoothPillShapes:clampCornerRadii:] <+[UIBezierPath _continuousRoundedRectBezierPath:withRoundedCorners:cornerRadius:segments:]+175> <+[UIBezierPath _roundedRectBezierPath:withRoundedCorners:cornerRadius:segments:legacyCorners:]+338> <-[_UITextMagnifiedLoupeView layoutSubviews]+2233> <__56-[_UITextMagnifiedLoupeView _updateCloseLoupeAnimation:]_block_invoke+89> <+[UIView(UIViewAnimationWithBlocksPrivate) _modifyAnimationsWithPreferredFrameRateRange:updateReason:animations:]+166> <block_destroy_helper.269+92> <block_destroy_helper.269+92> <__swift_instantiateConcreteTypeFromMangledName+94289> <block_destroy_helper.269+126> <+[UIView(UIViewAnimationWithBlocks) _setupAnimationWithDuration:delay:view:options:factory:animations:start:anima <block_destroy_helper.269+6763> <block_destroy_helper.269+10907> <-[_UITextMagnifiedLoupeView _updateCloseLoupeAnimation:]+389> <-[_UITextMagnifiedLoupeView setVisible:animated:completion:]+256> <-[UITextLoupeSession _invalidateAnimated:]+329> <-[UITextRefinementTouchBehavior textLoupeInteraction:gestureChangedWithState:location:translation:velocity: <-[UITextRefinementInteraction loupeGestureWithState:location:translation:velocity:modifierFlags:shouldCanc <-[UITextRefinementInteraction loupeGesture:]+701> <-[UIGestureRecognizerTarget _sendActionWithGestureRecognizer:]+71> <_UIGestureRecognizerSendTargetActions+100> <_UIGestureRecognizerSendActions+306> <-[UIGestureRecognizer _updateGestureForActiveEvents]+704> <_UIGestureEnvironmentUpdate+3892> <-[UIGestureEnvironment _updateForEvent:window:]+847> <-[UIWindow sendEvent:]+4937> <-[UIApplication sendEvent:]+525> <__dispatchPreprocessedEventFromEventQueue+1436> <__processEventQueue+8610> <updateCycleEntry+151> <_UIUpdateSequenceRun+55> <schedulerStepScheduledMainSection+165> <runloopSourceCallback+68> <__CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION__+17> <__CFRunLoopDoSource0+157> <__CFRunLoopDoSources0+293> <__CFRunLoopRun+960> <CFRunLoopRunSpecific+550> <GSEventRunModal+137> <-[UIApplication _run]+875> <UIApplicationMain+123> <__debug_main_executable_dylib_entry_point+63> 10d702478 204e57345 Type: Error | Timestamp: 2025-03-09 00:22:46.121407+09:00 | Process: FurusatoLocalCurrency | Library: CoreGraphics | Subsystem: com.apple.coregraphics | Category: Unknown process name | TID: 0x5c360 Unable to simultaneously satisfy constraints. Probably at least one of the constraints in the following list is one you don't want. Try this: (1) look at each constraint and try to figure out which you don't expect; (2) find the code that added the unwanted constraint or constraints and fix it. (Note: If you're seeing NSAutoresizingMaskLayoutConstraints that you don't understand, refer to the documentation for the UIView property translatesAutoresizingMaskIntoConstraints) ( "<NSAutoresizingMaskLayoutConstraint:0x600002202a30 h=--& v=--& _UIToolbarContentView:0x7fc2c6a5b8f0.width == 0 (active)>", "<NSLayoutConstraint:0x600002175e00 H:|-(0)-[_UIButtonBarStackView:0x7fc2c6817b10] (active, names: '|':_UIToolbarContentView:0x7fc2c6a5b8f0 )>", "<NSLayoutConstraint:0x600002175e50 H:[_UIButtonBarStackView:0x7fc2c6817b10]-(0)-| (active, names: '|':_UIToolbarContentView:0x7fc2c6a5b8f0 )>", "<NSLayoutConstraint:0x6000022019f0 'TB_Leading_Leading' H:|-(8)-[_UIModernBarButton:0x7fc2a5aa8920] (active, names: '|':_UIButtonBarButton:0x7fc2a5aa84d0 )>", "<NSLayoutConstraint:0x600002201a40 'TB_Trailing_Trailing' H:[_UIModernBarButton:0x7fc2a5aa8920]-(0)-| (active, names: '|':_UIButtonBarButton:0x7fc2a5aa84d0 )>", "<NSLayoutConstraint:0x600002201e50 'UISV-canvas-connection' UILayoutGuide:0x600003b7d420'UIViewLayoutMarginsGuide'.leading == _UIButtonBarButton:0x7fc2f57117f0.leading (active)>", "<NSLayoutConstraint:0x600002201ea0 'UISV-canvas-connection' UILayoutGuide:0x600003b7d420'UIViewLayoutMarginsGuide'.trailing == UIView:0x7fc2a5aac8e0.trailing (active)>", "<NSLayoutConstraint:0x6000022021c0 'UISV-spacing' H:[_UIButtonBarButton:0x7fc2f57117f0]-(0)-[UIView:0x7fc2a5aa8330] (active)>", "<NSLayoutConstraint:0x600002202210 'UISV-spacing' H:[UIView:0x7fc2a5aa8330]-(0)-[_UIButtonBarButton:0x7fc2a5aa84d0] (active)>", "<NSLayoutConstraint:0x600002202260 'UISV-spacing' H:[_UIButtonBarButton:0x7fc2a5aa84d0]-(0)-[UIView:0x7fc2a5aac8e0] (active)>", "<NSLayoutConstraint:0x600002176f30 'UIView-leftMargin-guide-constraint' H:|-(0)-[UILayoutGuide:0x600003b7d420'UIViewLayoutMarginsGuide'](LTR) (active, names: '|':_UIButtonBarStackView:0x7fc2c6817b10 )>", "<NSLayoutConstraint:0x600002176e40 'UIView-rightMargin-guide-constraint' H:[UILayoutGuide:0x600003b7d420'UIViewLayoutMarginsGuide']-(0)-|(LTR) (active, names: '|':_UIButtonBarStackView:0x7fc2c6817b10 )>" ) Will attempt to recover by breaking constraint <NSLayoutConstraint:0x600002201a40 'TB_Trailing_Trailing' H:[_UIModernBarButton:0x7fc2a5aa8920]-(0)-| (active, names: '|':_UIButtonBarButton:0x7fc2a5aa84d0 )> Make a symbolic breakpoint at UIViewAlertForUnsatisfiableConstraints to catch this in the debugger. The methods in the UIConstraintBasedLayoutDebugging category on UIView listed in <UIKitCore/UIView.h> may also be helpful.
Topic: UI Frameworks SubTopic: UIKit Tags:
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107
Mar ’25
SwiftUI: How to change `contentInset` of `List`
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0
0
173
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Topic: UI Frameworks SubTopic: SwiftUI Tags:
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193
Mar ’25