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.

All subtopics
Posts under UI Frameworks topic

Post

Replies

Boosts

Views

Activity

ARKit Camera Feed Zoom & Macro Support for Close-Range Objects
I am currently developing an AR experience using ARKit with SceneKit and am looking to implement functionality that enables: Zooming into the AR camera feed, ideally leveraging the ultra-wide or telephoto lenses available on supported devices. Macro-style focus capabilities, allowing users to view and interact with virtual content closely aligned with small or nearby real-world objects (within a few centimeters). My objective is to ensure that ARKit continues to render the scene accurately while enabling a zoomed-in view or macro-level focus for better detail visibility and alignment. Could you please advise on: Whether ARKit currently supports camera zoom or allows access to macro or ultra-wide cameras within an ARSession. Limitations or considerations when using multi-camera setups in conjunction with ARKit. Any guidance or references to documentation or sample code would be greatly appreciated.
0
0
164
May ’25
FamilyActivityTitleView Label has wrong text color when app is using different than system theme
Hello, In a new app I am working on I noticed the FamilyActivityTitleView that displays "ApplicationToken" has wrong (black) color when phone is set to light mode but app is using dark mode via override. We display user's selected apps and the labels are rendered correctly at first, but then when user updates selection with FamilyActivityPicker, then those newly added apps are rendered with black titles. The problem goes away when I close the screen and open it again. It also doesn't happen when phone is set to dark theme. I am currently noticing the issue on iOS 18.4.1. I have tried various workarounds like forcing white text in the custom label style, forcing re-render with custom .id value but nothing helped. Is there any way how to fix this?
0
0
135
May ’25
Best Way to Help Users Diagnose iOS App Crashes with No UI Feedback
Hi all, We're working on an iOS application and would like to improve our ability to diagnose failures - especially in scenarios where the app crashes before it can present any UI to the user. A few specific questions: In case of an exception or crash, is there a way to log the issue so the user (or our support team) can understand the cause of the failure? If the app crashes abruptly (e.g., due to a runtime exception or crash during launch), is there a recommended way to persist error information before the process terminates? Are there Apple-supported mechanisms (like crash reporting tools or APIs) we can integrate that would help us capture such issues? What’s the best practice for enabling support teams to assist users based on crash reports - especially for crashes that happen before any user interaction? Our goal is to make sure users aren't left in the dark if the app fails to start, and to allow us to deliver timely updates or support based on the cause of the crash. Thanks in advance for your guidance!
Topic: UI Frameworks SubTopic: General Tags:
0
0
105
May ’25
Display a broader track of a user on ios app with Mapkit.
Hello I'm currently building a feature within an ios app using SwiftUI and Mapkit to record the gps cordinates of a user as they move and render the track on the map. the idea is not really to have a "track" but to have a visual representation of the area the user sees while they are moving around. I need this width/breadth to be relative to the map and not the screen, such that when I zoom in and out of the map, the size will adjust automatically.
0
0
72
May ’25
A wrinkle converting a UIKit Document-based app to SwiftUI Document Group
The app I'm converting includes two unique document types. UI-wise they have key similarities (eg contents are password protected) But serialization/model - wise. they are different documents. I have not been able to find any documentation on options for implementing this (eg use a (abstract?) base class derived from FileDocument, with two concrete sub classes? maybe just a single subclass of FileDocument that contains model details for both file types?) Stepping back from implementation options, am I crazy for attempting to use DocumentGroup to create a single app that would need to be able to open/modify/save multiple unique document types? any/all guidance much appreciated.
Topic: UI Frameworks SubTopic: SwiftUI
0
0
70
May ’25
Stage Manager - UIWindowScene sizeRestrictions on iPad
Hello everyone, The setup: I have an iPadOS app. The app does not require full screen (Requires full screen option is disabled). The problem: The app starts looking unpolished when the canvas becomes too small. What I tried: I am trying to limit the canvas size for our app when run in Stage Manager. How: I saw that UIWindowScene has sizeRestrictions. This property is not always set as per documentation: https://developer.apple.com/documentation/uikit/uiwindowscene/sizerestrictions From my experiments, it only works when it's run on MacOS (in compatibility mode in our case). Console logs: Stage Manager - Requires full screen - OFF willConnectToSession - sizeRestrictions: nil sceneDidBecomeActive - sizeRestrictions: nil Stage Manager - Requires full screen - ON willConnectToSession - sizeRestrictions: nil sceneDidBecomeActive - sizeRestrictions: nil Stage Manager - Requires full screen - OFF - RUN on MacOS willConnectToSession - sizeRestrictions: Available sceneDidBecomeActive - sizeRestrictions: Available Question: Is there a way to enforce this minimum canvas size?
Topic: UI Frameworks SubTopic: UIKit
0
0
86
Mar ’25
NSHostingController menu not activated
I'm attempting to write a macOS version of https://stackoverflow.com/a/74935849/2178159. From my understanding, I should be able to set the menu property of an NSResponder and it will automatically show on right click. I've tried a couple things: A: set menu on an NSHostingController's view - when I do this and right or ctrl click, nothing happens. B: set menu on NSHostingController directly - when I do this I get a crash Abstract method -[NSResponder setMenu:] called from class _TtGC7SwiftUI19NSHostingControllerGVS_21_ViewModifier_...__. Subclasses must override C: manually call NSMenu.popup in a custom subclasses of NSHostingController or NSView's rightMouseDown method - nothing happens. extension View { func contextMenu(menu: NSMenu) -> some View { modifier(ContextMenuViewModifier(menu: menu)) } } struct ContextMenuViewModifier: ViewModifier { let menu: NSMenu func body(content: Content) -> some View { Interaction_UI( view: { content }, menu: menu ) .fixedSize() } } private struct Interaction_UI<Content: View>: NSViewRepresentable { typealias NSViewType = NSView @ViewBuilder var view: Content let menu: NSMenu func makeNSView(context: Context) -> NSView { let v = NSHostingController(rootView: view) // option A - no effect v.view.menu = menu // option B - crash v.menu = menu return v.view } func updateNSView(_ nsView: NSViewType, context: Context) { // part of option A nsView.menu = menu } }
0
0
283
Mar ’25
App displays wrong localized image
I have an image in the xcassets file which is localized for different languages. When setting App language to Traditional Chinese, it always displays the Simplified Chinese image. This happens on latest iOS 18.5 system, but not on a lower system version. The feedback assistant ID is FB17663546
0
1
90
Jun ’25
How to Use AccessorySetupKit to Automatically Trigger Hardware Pairing Screen in the Background?
Hello everyone, I’m currently developing an iOS app and would like to leverage the AccessorySetupKit framework introduced in iOS 18 to implement pairing functionality with our company's custom hardware product. The specific requirements are as follows: Our hardware supports both Bluetooth and Wi-Fi connections, and both are enabled. When the hardware device is in proximity to an iPhone, I want the device to be automatically recognized, and a pairing screen similar to the one in AccessorySetupKit should appear. Users should be able to perform the pairing process without needing to open our app, even if the app is not in the foreground. The system-level pairing screen should show the hardware information and allow the user to proceed with the pairing. My questions are: Does AccessorySetupKit allow the pairing screen to trigger when the app is running in the background, or must the app be in the foreground? How should I configure AccessorySetupKit to automatically recognize and display my company’s hardware device information? Are there any specific configurations or code implementations needed? Do I need to implement any specific Bluetooth/Wi-Fi advertising broadcasts to ensure the device is correctly detected by the iOS system when in proximity? Are there any additional permissions or configurations required, especially for handling background tasks? Thank you very much for your help, and I look forward to your advice and insights!
Topic: UI Frameworks SubTopic: UIKit
0
0
79
May ’25
CarPlay selection highlightning
It looks like I'm one of the rare developers dealing with CarPlay... I develop a CarPlay extension for my apps. A few things: especially when using the CarPlay I/O window in iOS Simulator, I get random selection highlightning for list items: I have three list templates in a tab template; once I reselect a list using the tab which has been selected before, the initial list item highlights / returns to normal every refresh of the list content; while this doesn't happen for my real world Sony CarPlay device, I'd rather not see such disturbing highlighting for my users. I do not update the template structs or items here, it is just content like text of detailText I update. Question: how to remove highlightning programmatically - especially for devices with touch screen? I have one user who reports auto-selection of UI elements while driving; I assume this is some problem with his touch screen, but it may be a general issue too. Question: anyone with similar observations connecting my iPhone to the stand-alone Car Play simulator doesn't work; I had it working before, so it might be related to a recent iOS beta... Any hints / observations are welcome. The CarPlay community really seems to be small and I'd like to hear other's experience on the named items.
0
0
88
May ’25
Tab bar inline icon text .compact mode in size classes in iPad in iOS 18..4.1
I am trying to do inline to icon and text in tab bar but it is not allowing me to do it in compact, but it showing me in regular mode , but in regular mode tab bar going at top in portrait mode , But my requirement is tab bar required in bottom with icon and text in inline it showed by horizontally but it showing to me stacked vertically, will you guide me on this so that I can push the build to live users.
0
0
121
May ’25
When presenting CPNavigationAlert the navigation bar will appear
In my CarPlay app, I am hiding the navigation bar by using the following: self.mapTemplate?.automaticallyHidesNavigationBar = true self.mapTemplate?.hidesButtonsWithNavigationBar = false I don't want the navigation bar to show unless a user interacts with the map by tapping it. Strangely, when I present a CPNavigationAlert the navigation bar will often appear and then disappear after the alert is dismissed. Is there a setting or reason that the navigation bar would be appearing when presenting this alert? I would like to keep the nav bar hidden during this time.
Topic: UI Frameworks SubTopic: UIKit Tags:
0
0
108
May ’25
Remove persistent bottom gray bar at the bottom when using hardware keyboard
DESCRIPTION OF PROBLEM When using SwiftUI’s TextField or TextEditor on iPadOS, a persistent gray or default system material bar appears at the bottom of the screen. This gray bar is not present in Apple’s native apps (such as Notes, Mail, Messages) or in third-party apps like ChatGPT and Beeper STEPS TO REPRODUCE Create a TextField or TextEditor. Run the code, click on it, without software keyboard enabled.
0
0
125
May ’25
Why is the pitch slider visible in SwiftUI tvOS map view?
Why is the pitch slider always visible in the SwiftUI tvOS map view? It doesn't even appear to be supported there, let alone the fact that I specify mapControlVisibility(.hidden). Am I missing something or is Apple? See attached screenshot. This really messes up my UI. Here is my code: import SwiftUI import MapKit struct ContentView: View { @State var position = MapCameraPosition.region(MKCoordinateRegion( center: CLLocationCoordinate2D(latitude: 37.7749, longitude: -122.4194), span: MKCoordinateSpan(latitudeDelta: 0.05, longitudeDelta: 0.05))) var body: some View { Map(position: $position) .mapControlVisibility(.hidden) .mapStyle(.standard(pointsOfInterest: .including(.airport))) } }
0
0
286
Mar ’25
iOS UILabel textAlignment .justified results in wrong rect by layoutManager.boundingRect
I have a UILabel subclass showing NSAttributedString in which I need to draw a rounded rectangle background color around links: import UIKit class MyLabel: UILabel { private var linkRects = [[CGRect]]() private let layoutManager = NSLayoutManager() private let textContainer = NSTextContainer(size: .zero) private let textStorage = NSTextStorage() override func draw(_ rect: CGRect) { let path = UIBezierPath() linkRects.forEach { rects in rects.forEach { linkPieceRect in path.append(UIBezierPath(roundedRect: linkPieceRect, cornerRadius: 2)) } } UIColor.systemGreen.withAlphaComponent(0.4).setFill() path.fill() super.draw(rect) } override init(frame: CGRect) { super.init(frame: frame) setup() } required init?(coder: NSCoder) { super.init(coder: coder) setup() } private func setup() { numberOfLines = 0 adjustsFontForContentSizeCategory = true isUserInteractionEnabled = true lineBreakMode = .byWordWrapping contentMode = .redraw clearsContextBeforeDrawing = true isMultipleTouchEnabled = false backgroundColor = .red.withAlphaComponent(0.1) textContainer.lineFragmentPadding = 0 textContainer.maximumNumberOfLines = numberOfLines textContainer.lineBreakMode = lineBreakMode textContainer.layoutManager = layoutManager layoutManager.textStorage = textStorage layoutManager.addTextContainer(textContainer) textStorage.addLayoutManager(layoutManager) } override func layoutSubviews() { super.layoutSubviews() calculateRects() } private func calculateRects(){ linkRects.removeAll() guard let attributedString = attributedText else { return } textStorage.setAttributedString(attributedString) let labelSize = frame.size textContainer.size = labelSize layoutManager.ensureLayout(for: textContainer) let textBoundingBox = layoutManager.usedRect(for: textContainer) print("labelSize: \(labelSize)") print("textBoundingBox: \(textBoundingBox)") var wholeLineRanges = [NSRange]() layoutManager.enumerateLineFragments(forGlyphRange: NSRange(0 ..< layoutManager.numberOfGlyphs)) { _, rect, _, range, _ in wholeLineRanges.append(range) print("Whole line: \(rect), \(range)") } attributedString.enumerateAttribute(.link, in: NSRange(location: 0, length: attributedString.length)) { value, clickableRange, _ in if value != nil { var rectsForCurrentLink = [CGRect]() wholeLineRanges.forEach { wholeLineRange in if let linkPartIntersection = wholeLineRange.intersection(clickableRange) { var rectForLinkPart = layoutManager.boundingRect(forGlyphRange: linkPartIntersection, in: textContainer) rectForLinkPart.origin.y = rectForLinkPart.origin.y + (textContainer.size.height - textBoundingBox.height) / 2 // Adjust for vertical alignment rectsForCurrentLink.append(rectForLinkPart) print("Link rect: \(rectForLinkPart), \(linkPartIntersection)") } } if !rectsForCurrentLink.isEmpty { linkRects.append(rectsForCurrentLink) } } } print("linkRects: \(linkRects)") setNeedsDisplay() } } And I use this as such: let label = MyLabel() label.setContentHuggingPriority(.required, for: .vertical) label.setContentHuggingPriority(.required, for: .horizontal) view.addSubview(label) label.snp.makeConstraints { make in make.width.lessThanOrEqualTo(view.safeAreaLayoutGuide.snp.width).priority(.required) make.horizontalEdges.greaterThanOrEqualTo(view.safeAreaLayoutGuide).priority(.required) make.center.equalTo(view.safeAreaLayoutGuide).priority(.required) } let paragraphStyle = NSMutableParagraphStyle() paragraphStyle.alignment = .justified let s = NSMutableAttributedString(string: "Lorem Ipsum: ", attributes: [.font: UIFont.systemFont(ofSize: 17, weight: .regular), .paragraphStyle: paragraphStyle]) s.append(NSAttributedString(string: "This property controls the maximum number of lines to use in order to fit the label's text into its bounding rectangle.", attributes: [.link: URL(string: "https://news.ycombinator.com/") as Any, .foregroundColor: UIColor.link, .font: UIFont.systemFont(ofSize: 14, weight: .regular), .paragraphStyle: paragraphStyle])) label.attributedText = s Notice the paragraphStyle.alignment = .justified This results in: As you can see, the green rect background is starting a bit further to the right and also ending much further to the right. If I set the alignment to be .left or .center, then it gives me the correct rects: Also note that if I keep .justified but change the font size for the "Lorem Ipsom:" part to be a bit different, lets say 16 instead of 17, then it gives me the correct rect too: Also note that if we remove some word from the string, then also it starts giving correct rect. It seems like if the first line is too squished, then it reports wrong rects. Why is .justified text alignment giving me wrong rects? How can I fix it?
Topic: UI Frameworks SubTopic: UIKit
0
0
98
May ’25
Reliable APIs to check if a Hotkey/Shortcut is already in use?
In our application we have two usecases for a Hotkey/Shortcut identification API/method. We have some predefined shortcuts that will ship with our MacOS application. They may or may not change dynamically, based on what the user has already set as shortcuts/hotkeys, and also to avoid any important system wide shortcuts that the user may or may not have changed. We allow the user to customize the shortcuts/hotkeys in our application, so we want to show what shortcuts the user already has in use system-wide and across their OS experience. This gives rise to the need for an API that lets us know which shortcut/hotkeys are currently being used by the user and also the current system wide OS shortcuts in use. Please let me know if there are any APIs in AppKit or SwiftUI we can use for the above
0
0
289
Mar ’25
Putting buttons over SwiftUI map view
Has anyone gotten custom buttons to work on top of tvOS Map()? I've tried many variations of FocusState focusSection .defaultFocus() and as soon as the map appears at startup the buttons never get focus again. They are on a ZStack over the map. I could post code but truthfully nothing works for me. I'm wondering if anyone has successfully put focusable buttons on top of the map view.
0
0
241
Mar ’25
SwiftUI: How to change `contentInset` of `List`
Hi, Is there any way of changing the contentInset (UIKit variant) of a List in SwiftUI? I do not see any APIs for doing so, the closest I gotten is to use safeAreaInset . While visually that works the UX is broken as you can no longer "scroll" from the gap made by the .safeAreaInset(edge:alignment:spacing:content:) I have subbmited a feedback suggestion: FB16866956
0
0
184
Mar ’25