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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IOS cursor control
My app controls the cursor movement in a text view on iPhone and iPads. On screen touch, the IOS cursor position is out of sync with the app cursor position. Is there a way to find out, on screen touch, where the ios cursor positition is and update the app cursor to the ios cursor position? When they are out of sync, the user has to move the cursor to the startIndex and navigate from there. Frustating! I have looked at many programming books, forums, and internet search with nothing to no avail. Any help will be greatly appreciated. The app names are SummaGramPhonex and SummaGramIPAD11 and SummaGramIPAD13. Thanks. Charlie 3Sep25
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iOS 26 Beta 9 dark/light traits behaviour
I want to check if this behaviour is legit in iOS 26 Beta: We have an admittedly stranger setup where a child view controller acts as a TabBar and is a UIHostingController so that we can use SwiftUI for the tab bar items. One of the tab pages has a scrollview whose content (imagine a chat view) might go from a lighter aspect to darker colors and back when scrolling. When we scroll to predominantly dark bubbles, the trait of the tabBar changes to dark mode. The function traitCollectionDidChange() on the UIHostingController is called ! but only for the tabBar controller. I know that in iOS there is some blending going on at the tabBar level when scrolling, but changing just one view + subviews to dark mode, automatically, instead of user triggered? It might be some optimisation if the view is considered opaque? But then I would expect to not change anything visually, if opaque. Is this expected behaviour on iOS 26? And if so, can we disable it? But just this blending/ trait changing, and keep the user triggered trait changes.
Topic: UI Frameworks SubTopic: SwiftUI
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SwiftUI NavigationSplitView doesn't work for DocumentGroup
When using a NavigationSplitView in a DocumentGroup, SwiftUI renders incorrect UI and doesn’t let the user navigation between the sidebar and detail views. Even the default Xcode project template “Document App” doesn’t work. Steps to reproduce Create a new project and use the Document App template. Run the project on either iPad or iPhone running iOS 26 beta 9 Experience the following issues. On iPhone The back button (to return to the document browser) and the document title are rendered two times. When viewing the detail of an item, by navigating to the detail view, you cannot go back to the list of items, because the back button brings you back to the document browser. The same issues are also present on iPad. I've tested this on an iPad and iPhone running iOS 26 beta 9 and Xcode 26.0 beta 7. I've reported this issue already → FB20062294
Topic: UI Frameworks SubTopic: SwiftUI
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View presented as sheet are properly updated to correct color scheme
I’m facing an issue and I’d like to know if anyone has already run into this. I have a ContentView that presents a SettingsView as a sheet. SettingsView applies a change to the app’s colorScheme. ContentView reacts correctly to the change, and SettingsView does too (so far, so good). What’s strange is that when I set nil on the preferredColorScheme modifier (which, according to the docs, corresponds to the system color scheme), ContentView correctly picks up the change and refreshes, while SettingsView does pick up the change but doesn’t refresh. (In the video you can clearly see that when I switch from Dark to System, the parent view refreshes properly but not the presented sheet.) I’ve tried everything—switching to UIKit, changing the sheet’s ID… nothing works Another strange thing: if I present SettingsView through a NavigationLink, everything works normally… Here is a sample code to reproduce: import SwiftUI enum AppTheme: Int { case system = 0 case dark = 1 case light = 2 var colorScheme: ColorScheme? { switch self { case .system: return nil case .light: return .light case .dark: return .dark } } } struct SettingsView: View { @AppStorage("theme") var appTheme: AppTheme = .system var body: some View { VStack(spacing: 8) { Button { select(theme: .system) } label: { Text("Systeme") } Button { select(theme: .dark) } label: { Text("Dark") } Button { select(theme: .light) } label: { Text("Light") } } .preferredColorScheme(appTheme.colorScheme) } func select(theme: AppTheme) { appTheme = theme } } struct ContentView: View { @AppStorage("theme") var appTheme: AppTheme = .system @State var isPresented = false var body: some View { NavigationStack { VStack { Button { isPresented = true } label: { Text("Present settings") } // NavigationLink("Present settings") { // SettingsView() // } } .preferredColorScheme(appTheme.colorScheme) .sheet(isPresented: $isPresented) { SettingsView() } } } } #Preview { ContentView() }
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NavigationSplitView + inspector causes Sidebar state issues on Mac Catalyst
Hi everyone! I've encountered an issue on Mac Catalyst: using the latest inspector modifier causes abnormal Sidebar and Columns state in NavigationSplitView. Sample Code: struct ContentView: View { @State private var isPresented = false var body: some View { NavigationSplitView { List { ForEach(0..<20, id: \.self) { item in Text("Item \(item)") } } } content: { List { ForEach(0..<20, id: \.self) { item in Text("Item \(item)") } } } detail: { List { } } .inspector(isPresented: $isPresented) { Form { } } } } Steps to reproduce: Xcode 16 beta 7, create a new iOS project Paste the code above Enable Mac Catalyst Run on Mac (macOS 15 beta 9) Press Command+N three times to open 3 new windows Click the Sidebar Toggle button The issue occurs (see screenshot below) Through testing, I found that as long as the inspector modifier is attached, the issue occurs. Also, the problem only appears in the 3rd and subsequent newly opened windows—the first two windows work as expected. FB20061521
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Unexpected Widget Refresh When Pausing or Playing Music in iOS App
Widget abnormal refresh My app is a music application. When playing or pausing a song, the status is synchronized to NowPlaying, and the app itself supports widgets. During testing, I found that when pausing or playing music, the widget triggers a timeline refresh, which is completely unexpected. However, switching songs does not cause this. Looking at Apple’s logs: By default 21:27:08.094490+0800 mediaremoted Set: origin-iPhone-1280262988/client-com.company.musicdev-10059 (music)/player-MediaRemote-DefaultPlayer setting inferred playback state from to By default 21:27:08.094607+0800 mediaremoted [MRDNowPlayingPlayerClient] PlaybackState changed from Playing to Paused for origin-iPhone-1280262988/client-com.company.musicdev-10059 (music)/player-MediaRemote-DefaultPlayer By default 21:27:08.094713+0800 mediaremoted [MRDNowPlayingPlayerClient] isPlaying changed to false for origin-iPhone-1280262988/client-com.company.musicdev-10059 (music)/player-MediaRemote-DefaultPlayer By default 21:27:08.111861+0800 mediaremoted Posted Active Now Playing Notification kMRMediaRemoteNowPlayingApplicationPlaybackStateDidChangeNotification for path origin-iPhone-1280262988/client-com.company.musicdev-10059 (music)/player-MediaRemote-DefaultPlayer By default 21:27:08.115550+0800 mediaremoted Response: handlePlaybackQueueRequest<B0BDBB4E-C539-4D39-B51C-718115EBD7C4 assistantd-2659 /M/L/AF/R[0:1]> returned for origin-iPhone-1280262988/client-com.company.musicdev-10059 (music)/player-MediaRemote-DefaultPlayer in 0.0005 seconds By default 21:27:08.119344+0800 assistantd Response: playbackQueue<B0BDBB4E-C539-4D39-B51C-718115EBD7C4 assistantd-2659 /M/L/AF/R[0:1]> returned <> for origin-iPhone-1280262988/client-com.company.musicdev-10059 (music)/player-MediaRemote-DefaultPlayer in 0.0010 seconds By default 21:27:08.122322+0800 SpringBoard Response: playbackState<63A30582-E3C2-4F4D-AC57-8E5841FAD568> returned for origin-iPhone-1280262988/client-com.company.musicdev-10059 (music)/player-MediaRemote-DefaultPlayer in 0.0005 seconds By default 21:27:08.126132+0800 chronod Observed com.company.musicdev stopped running for exempt reason: nowPlaying - remainingReasons: None By default 21:27:08.126285+0800 chronod [com.company.musicdev::com.company.musicdev.musicdesktopwidget:VisionWidget_medium4158108784:systemMedium:3758765227620768254:338.00/158.00/21.60:(null)~(null)] on local marked as requiring reload By default 21:27:08.126455+0800 chronod [com.company.musicdev::com.company.musicdev.musicdesktopwidget:VisionWidget_medium4158108784:3758765227620768254] Reload with configuration [systemRequest(sessionEnded)-immediate-free-1] By default 21:27:08.126854+0800 mediaremoted Response: handlePlaybackQueueRequest<ACF764D9-05A6-41FF-8BB5-8CB81A8BC163 assistantd-2659 /M/L/AF/R[0:1]> returned for origin-iPhone-1280262988/client-com.company.musicdev-10059 (music)/player-MediaRemote-DefaultPlayer in 0.0008 seconds By default 21:27:08.127960+0800 assistantd Response: playbackQueue<ACF764D9-05A6-41FF-8BB5-8CB81A8BC163 assistantd-2659 /M/L/AF/R[0:1]> returned <> for origin-iPhone-1280262988/client-com.company.musicdev-10059 (music)/player-MediaRemote-DefaultPlayer in 0.0016 seconds By default 21:27:08.128091+0800 wifid Response: playbackState returned for origin-iPhone-1280262988/client-com.company.musicdev-10059 (music)/player-MediaRemote-DefaultPlayer in 0.0115 seconds When the music state changes, you can see the widget is triggered to refresh. I want to ask if this is the system’s mechanism? I checked my code and there is no operation to actively refresh the widget when pausing or playing. Can this situation be avoided?
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iPadOS: remove system actions from Menu Bar
Hi, I am setting up the iPadOS26 Menu Bar, and it comes with some existing menu items that don't make sense for my app. For example, under "File" menu, there are options for New Window, Duplicate, Move, Rename and Export that I would like to remove (which keeping the Close Window option). What's the best way to do this?
Topic: UI Frameworks SubTopic: UIKit
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iPadOS keyboard formatting options
Hi, When I have a UITextView displayed on screen and in focus, the iPad keyboard shows buttons to Bold, Italics and Underline text (since it supports attributed text), and also a 'formatting' button that allows the user to change the font, color and size of the text, as well as justify text and add numbered lists and bullet points. Is there any way to disable or remove this 'formatting' button? My app doesn't support saving these options (other than bold, italics and underline), so it confuses users to see this option. Thanks.
Topic: UI Frameworks SubTopic: UIKit
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Using Glass in SwiftUI Crashes with Missing Weak Symbol
My Xcode project fails to run with the following crash log any time I use a new SwiftUI symbol such as ConcentricRectangle or .glassEffect. I've tried using the legacy linker to no avail. It compiles perfectly fine, and I've tried targeting just macOS 26 also to no avail. This is a macOS project that's compiled just fine for years and compiles and runs on macOS going back to 13.0. Failed to look up symbolic reference at 0x118e743cd - offset 1916987 - symbol symbolic _____y_____y_____y_____yAAyAAy_____y__________G_____G_____yAFGGSg_ACyAAy_____y_____SSG_____y_____SgGG______tGSgACyAAyAAy_____ATG_____G_AVtGSgtGGAQySbGG______Qo_ 7SwiftUI4ViewPAAE11glassEffect_2inQrAA5GlassV_qd__tAA5ShapeRd__lFQO AA15ModifiedContentV AA6VStackV AA05TupleC0V AA01_hC0V AA9RectangleV AA5ColorV AA12_FrameLayoutV AA24_BackgroundStyleModifierV AA6IDViewV 8[ ]012EditorTabBarC0V AA022_EnvironmentKeyWritingS0V A_0W0C AA7DividerV A_0w4JumpyC0V AA08_PaddingP0V AA07DefaultgeH0V in /Users/[ ]/Library/Developer/Xcode/DerivedData/[ ]-grfjhgtlsyiobueapymobkzvfytq/Build/Products/Debug/[ ]/Contents/MacOS/[ ].debug.dylib - pointer at 0x119048408 is likely a reference to a missing weak symbol Example crashing code: import SwiftUI struct MyView: View { var body: some View { if #available(macOS 26.0, *) { Text("what the heck man").glassEffect() } } }
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iOS 26 Liquid Glass not showing
I’m not seeing Liquid Glass on any standard components. A month ago around July 17th I ran our app and saw Liquid Glass on our tab view and various standard components. Those components have not been changed and yet I’m no longer seeing Liquid Glass in our app at all. Components that were previously liquid glass but now are not include TabView and back navigation buttons. I set the UIDesignRequiresCompatibility key explicitly to false but no luck. I was seeing this in Beta 7 and Beta 8 on a real device and on a sim.
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CarPlay app not receiving data updates when iPhone screen is locked
We are building a CarPlay app and have run into an issue with data updates. When the app is running on the CarPlay display and the iPhone screen is locked, no data updates are shown on the CarPlay screen. As soon as the phone is unlocked, the data updates appear instantly on the CarPlay display. Has anyone encountered this behavior before? Is there a specific setting, entitlement, or background mode we need to enable in order to ensure the CarPlay app continues to receive and display data while the iPhone is locked? Any guidance would be greatly appreciated.
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Custom Keyboard help
import UIKit class KeyboardViewController: UIInputViewController { // MARK: - Properties private var keyboardView: KeyboardView! private var heightConstraint: NSLayoutConstraint! private var hasInitialLayout = false // 存储系统键盘高度和动画参数 private var systemKeyboardHeight: CGFloat = 300 private var keyboardAnimationDuration: Double = 0.25 private var keyboardAnimationCurve: UIView.AnimationOptions = .curveEaseInOut // MARK: - Lifecycle override func viewDidLoad() { super.viewDidLoad() setupKeyboard() } override func viewWillAppear(_ animated: Bool) { super.viewWillAppear(animated) // 在视图显示前更新键盘高度,避免闪动 if !hasInitialLayout { hasInitialLayout = true } } override func viewDidAppear(_ animated: Bool) { super.viewDidAppear(animated) } // MARK: - Setup private func setupKeyboard() { // 创建键盘视图 keyboardView = KeyboardView() keyboardView.translatesAutoresizingMaskIntoConstraints = false view.addSubview(keyboardView) // 设置约束 - 确保键盘贴紧屏幕底部 NSLayoutConstraint.activate([ keyboardView.leftAnchor.constraint(equalTo: view.leftAnchor), keyboardView.rightAnchor.constraint(equalTo: view.rightAnchor), keyboardView.bottomAnchor.constraint(equalTo: view.bottomAnchor) ]) // 设置初始高度约束(使用系统键盘高度或默认值) let initialHeight = systemKeyboardHeight heightConstraint = keyboardView.heightAnchor.constraint(equalToConstant: initialHeight) heightConstraint.isActive = true } // MARK: - Layout Events override func viewDidLayoutSubviews() { super.viewDidLayoutSubviews() } override func viewSafeAreaInsetsDidChange() { super.viewSafeAreaInsetsDidChange() } // MARK: - 键盘高度请求 // 这个方法可以确保键盘扩展报告正确的高度给系统 override func updateViewConstraints() { super.updateViewConstraints() // 确保我们的高度约束是最新的 if heightConstraint == nil { let height = systemKeyboardHeight &gt; 0 ? systemKeyboardHeight : 216 heightConstraint = NSLayoutConstraint( item: self.view!, attribute: .height, relatedBy: .equal, toItem: nil, attribute: .notAnAttribute, multiplier: 0.0, constant: height ) heightConstraint.priority = UILayoutPriority(999) view.addConstraint(heightConstraint) } else { let height = systemKeyboardHeight &gt; 0 ? systemKeyboardHeight : 216 heightConstraint.constant = height } } } // MARK: - Keyboard View Implementation class KeyboardView: UIView { private var keysContainer: UIStackView! override init(frame: CGRect) { super.init(frame: frame) setupView() } required init?(coder: NSCoder) { super.init(coder: coder) setupView() } private func setupView() { backgroundColor = UIColor(red: 0.82, green: 0.84, blue: 0.86, alpha: 1.0) // 创建按键容器 keysContainer = UIStackView() keysContainer.axis = .vertical keysContainer.distribution = .fillEqually keysContainer.spacing = 8 keysContainer.translatesAutoresizingMaskIntoConstraints = false addSubview(keysContainer) // 添加约束 - 确保内容在安全区域内 NSLayoutConstraint.activate([ keysContainer.topAnchor.constraint(equalTo: safeAreaLayoutGuide.topAnchor, constant: 8), keysContainer.leftAnchor.constraint(equalTo: safeAreaLayoutGuide.leftAnchor, constant: 8), keysContainer.rightAnchor.constraint(equalTo: safeAreaLayoutGuide.rightAnchor, constant: -8), keysContainer.bottomAnchor.constraint(equalTo: safeAreaLayoutGuide.bottomAnchor, constant: -8) ]) // 添加键盘行 } }
Topic: UI Frameworks SubTopic: UIKit Tags:
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Navigation title not visible in SplitViewController in macCatalyst on iOS 26
We are using a column style split view controller as root view of our app and in iOS26 the navigation titles of primary and supplementary view controllers are not visible and secondary view controller title is displayed in supplementary column. Looks the split view hidden all the child view controllers title and shown the secondary view title as global in macCatlayst. The right and left barbutton items are showing properly for individual view controllers. Facing this weird issue in iOS26 betas. The secondary navigation title also visible only when WindowScene,titlebar.titleVisibility is not hidden. Kindly suggest the fix for this issue as we can't use the secondary view navigation title for showing supplementary view's data. The issue not arises in old style split views or when the split view embedded in another splitView. Refer the sample code and attachment here let splitView = UISplitViewController(style: .tripleColumn) splitView.preferredDisplayMode = .twoBesideSecondary splitView.setViewController(SplitViewChildVc(title: "Primary"), for: .primary) splitView.setViewController(SplitViewChildVc(title: "Supplementary"), for: .supplementary) splitView.setViewController(SplitViewChildVc(title: "Secondary"), for: .secondary) class SplitViewChildVc: UIViewController { let viewTitle: String init(title: String = "Default") { self.viewTitle = title super.init(nibName: nil, bundle: nil) } override func viewDidLoad() { super.viewDidLoad() self.title = viewTitle self.navigationItem.title = viewTitle if #available(iOS 26.0, *) { navigationItem.subtitle = "Subtitle" } let leftbutton = UIBarButtonItem(barButtonSystemItem: .cancel, target: nil, action: nil) navigationItem.leftBarButtonItem = leftbutton let rightbutton = UIBarButtonItem(barButtonSystemItem: .add, target: nil, action: nil) navigationItem.rightBarButtonItem = rightbutton } }
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Text with Liquid Glass effect
I'm looking for a way to implement Liquid Glass effect in a Text, and I have issues. If I want to do gradient effect in a Text, no problem, like below. Text("Liquid Glass") .font(Font.system(size: 30, weight: .bold)) .multilineTextAlignment(.center) .foregroundStyle( LinearGradient( colors: [.blue, .mint, .green], startPoint: .leading, endPoint: .trailing ) ) But I cannot make sure that I can apply the .glassEffect with .mask or .foregroundStyle. The Glass type and Shape type argument looks like not compatible with the Text shape itself. Any solution to do this effect on Text ? Thanks in advance for your answers.
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List reordering animation broken in iOS 26
just opened a iOS18 project in latest Xcode 26 (beta 7) and the list reordering animation is broken and jerky. on iOS 18 a change to one of the list items would smoothly move it to its correct place but in iOS 26 the items jerk around, disappear then pop up in the correct order in the list. I am using this to filter and sort the "events" if searchQuery.isEmpty { return events.sort(on: selectedSortOption) } else { let filteredEvents = events.compactMap { event in // Check if the event title contains the search query (case-insensitive). let titleContainsQuery = event.title.range(of: searchQuery, options: .caseInsensitive) != nil return titleContainsQuery ? event : nil } return filteredEvents.sort(on: selectedSortOption) } } is there a better way for iOS 26?
Topic: UI Frameworks SubTopic: SwiftUI
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UIBarButtonItem Doesn't Reset the Badge
Hello, I hope you're all doing well! I'm currently working on integrating new iOS 26 features into my app, and so far, the process has been really exciting. However, I've encountered an issue when updating the badge of a UIBarButtonItem, and I’m hoping to get some insights or suggestions. The app has two UIViewController instances in the navigation stack, each containing a UIBarButtonItem. On the first controller, the badge is set to 1, and on the second, the badge is set to 2. In the second controller, there is a "Reset" button that sets the badge of the second controller to nil. However, when I tap the "Reset" button, instead of setting the badge to nil, it sets the value to 1. I would appreciate any ideas or suggestions on how to solve this problem. Maybe I am using the badge API incorrectly. Thank you! class ViewController: UIViewController { var cartButtonItem: UIBarButtonItem! override func viewDidLoad() { super.viewDidLoad() configureNavigationItem() } func configureNavigationItem() { cartButtonItem = UIBarButtonItem(image: UIImage(resource: .cartNavBar), style: .plain, target: self, action: #selector(showCartTab)) cartButtonItem.tintColor = UIColor.systemBlue cartButtonItem.badge = .count(1) navigationItem.rightBarButtonItem = cartButtonItem } @objc func showCartTab() { // Add second view controller in navigation stack performSegue(withIdentifier: "Cart", sender: nil) } } class CartViewController: UIViewController { var cartButtonItem: UIBarButtonItem! override func viewDidLoad() { super.viewDidLoad() configureNavigationItem() } func configureNavigationItem() { cartButtonItem = UIBarButtonItem(image: UIImage(resource: .cartNavBar), style: .plain, target: nil, action: nil) cartButtonItem.tintColor = UIColor.systemBlue cartButtonItem.badge = .count(2) navigationItem.rightBarButtonItem = cartButtonItem } func updateBadge() { cartButtonItem.badge = nil } @IBAction func resetButtonPressed(_ sender: Any) { updateBadge() } }
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CarPlay: CPListTemplate item limit and image memory usage
I’m working with CPListTemplate in CarPlay and have run into two issues: Item limit: The documentation states that maximumItemCount is 500. In practice, when providing a list of ~2–4k items, only the first 500 are displayed. However, Apple Music on CarPlay seems to handle larger lists without this limitation. Is there an API-level approach or recommended pattern to support lists beyond this cap? Image memory usage: Cells don’t appear to load lazily. Even with small images, the first 500 items load all their artwork into memory immediately, resulting in ~400–700 MB usage and high CPU loads. This seems excessive for CarPlay environments. Is there a best practice for deferring or managing image loading within CPListTemplate? Any official guidance or known workarounds for these two issues would be very helpful.
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HideAllTips launch argument does not work in xctestplan
The launch argument -com.apple.TipKit.HideAllTips 1 does not work if it is defined in xctestplan arguments passed on launch. I tested it with the apple provided example app, where I created simple UI test and added xctestplan with launch argument -com.apple.TipKit.HideAllTips 1. The app does not hide the tips when it is running the UI Tests. Is there any solution that works? Thanks for reply.
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