Construct and manage graphical, event-driven user interfaces for iOS or tvOS apps using UIKit.

Posts under UIKit tag

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iOS26: Back button changes appearance when modal screen is shown
I use appearance api to set a custom background image for my navigation bar. At the start color of the back button icon is black. But for some reason color becomes white when new screen is presented modally. My whole project is relied on the appearance api so I cannot remove or replace it. Looks like a bug. The setup code is simple: func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?) -> Bool { // Override point for customization after application launch. setupappearance() return true } func setupappearance() { let navImage = UIImage(named: "new_navigation_background1") let appearance = UINavigationBarAppearance() appearance.configureWithOpaqueBackground() appearance.backgroundImage = navImage UINavigationBar.appearance().scrollEdgeAppearance = appearance UINavigationBar.appearance().standardAppearance = appearance UINavigationBar.appearance().compactAppearance = appearance UINavigationBar.appearance().compactScrollEdgeAppearance = appearance }
Topic: UI Frameworks SubTopic: UIKit Tags:
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241
Oct ’25
Xcode build running into issues
I have been trying to run the ios build and facing issues since last few days. I installed xcode with ios26 and switched to xcode 16.2 beta and now in xcode16.1. My development is blocked as am hitting errors one after the other. Can you point me to any configuration which works ? My development is blocked and its real pain.
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140
Oct ’25
App Crashes in UICollectionView.m:3974
No Trace of My App is found in Crash Report. The last trace is from UIKitCore. -> Foundation [NSAssertionHandler handleFailureInMethod:object:file:lineNumber:description:] + 288 (NSException.m:252) -> UIKitCore [UICollectionView _createPreparedSupplementaryViewForElementOfKind:atIndexPath:layout:withLayoutAttributes:applyAttributes:] + 1180 (UICollectionView.m:3974) What can be the possible causes for this type of crash?
Topic: UI Frameworks SubTopic: UIKit Tags:
1
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131
Oct ’25
[iOS 26] Can no longer detect whether iPhone has notch
I'm currently using the extension below to determine whether an iPhone has a notch so I can adjust my UI accordingly. extension UIDevice { var hasNotch: Bool { if userInterfaceIdiom == .phone, let window = (UIApplication.shared.connectedScenes .compactMap { $0 as? UIWindowScene } .flatMap { $0.windows } .first { $0.isKeyWindow }) { return window.safeAreaInsets.bottom > 0 } return false } } (Adapted from https://stackoverflow.com/questions/73946911/how-to-detect-users-device-has-dynamic-island-in-uikit) This no longer works in iOS 26, and I have yet to find a similar method that works. Does anyone have any fixes?
4
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287
Oct ’25
XIB Files line seperator = none not be respected in iOS 26.1 ONLY
Hey All, Curious if you guys are seeing the same thing for those who are using Interface Builder Files (Xib) i set the line seperator to none and on my app (built against ios 18 on the app store, but doesnt matter if i build it against ios 26, or ios 26.1) when running on iOS 26.1 the line seperator will show even when i set it to None. Funny enough if i just play around with the XIB file and set it to single line and maybe RED color the IB file will show it but when running it its the same old default dark greyish color. BUT if i set the line seperator in CODE either to be none or with single line + red it looks good when running on sim / device. So it seems to be an issue with XIB files not being respected in iOS 26.1 (only) i have submitted a feed back FB20466783, hope this helps any xcode devs / uikit devs. thank you !
1
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141
Oct ’25
Recover iPadOS MenuBar state from different scenes
I’m building a Flutter plugin to access the new menubar API on iPadOS. Everything works fine with a single scene, but I’m running into issues when adding support for multiple scenes: Only odd-numbered windows (first, third, etc.) build their menus correctly. Even-numbered windows ignore the menus sent from Flutter and fall back to a default menubar. When switching between scenes, the last rendered menu always persists instead of updating to the current focus. So far, I’ve: Implemented the plugin as a singleton. Tried to persist menu state per scene, but without success. What would be the recommended approach here? Should I avoid a singleton and manage state entirely per UIScene instance? The project is open-source, and if anyone is willing to take a look, here are the relevant files: /ios/Classes/IpadOSMenubarPlugin.swift /example/ios/Runner/AppDelegate.swift Any guidance would be much appreciated.
1
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126
Oct ’25
UIScene based state restoration on tvOS not working
I can’t get UIScene-based state restoration to work on tvOS as it does on iOS. UISceneSession.stateRestorationActivity is always nil in UIWindowSceneDelegate.scene(_:willConnectTo:options:) despite UIWindowSceneDelegate.stateRestorationActivity(for:) being called in the previous lifecycle. The NSUserActivityType is correctly configured in the Info.plist. Has anyone encountered the same issue or knows how to get this to work? Sample Project https://github.com/antiraum/tvosSceneStateRestoration Feedback FB20451479
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143
Sep ’25
Using UIDocumentViewController with UISplitViewController in Xcode 26
I created a UIKit Document-Based App in Xcode 26. When using UIDocumentViewController on its own, everything works fine. However, when I try to use it with UISplitViewController or add a Toolbar, I run into an issue: the Sidebar and Toolbar UI remain visible above the Document Browser. Older sample projects show a Document-Based App set up with UISplitViewController, but it seems like with the more recent recommended approach, UISplitViewController may no longer be supported. Is that correct? While I could give up on using a Toolbar, I’d really like to know if there’s still a way to use UISplitViewController together with UIDocumentViewController.
Topic: UI Frameworks SubTopic: UIKit Tags:
0
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80
Sep ’25
Click on UITextView or UITextField to crash
*** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[__NSCFString timeIntervalSinceReferenceDate]: unrecognized selector sent to instance 0x115fadbc0' *** First throw call stack: (0x1940bd8c8 0x1910097c4 0x194159838 0x19403a4f8 0x1940423a0 0x1e42cb9a8 0x1e42ce220 0x106f02c08 0x1080a461c 0x1080be2b0 0x1080acb2c 0x1080ad7b4 0x1080b9b00 0x1080b91a4 0x1eecdb3b8 0x1eecda8c0) libc++abi: terminating due to uncaught exception of type NSException InputAnalytics called timeIntervalSinceReferenceDate in dispatch_sync.The display issue of the call stack occurs in two stages: keyboard input analysis and folding the keyboard. After adding protection to NSString, it can function normally, but I want to know the reason #import "NSString+Safe.h" @implementation NSString (Safe) - (NSTimeInterval)timeIntervalSinceReferenceDate { return 0; } - (NSTimeInterval)timeIntervalSinceDate:(NSDate *)date { return 0; } @end
1
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155
Sep ’25
preferredImageDynamicRange is not marked as being available only for iOS 17 and above.
open var isAnimating: Bool { get } /// The preferred treatment to use for HDR images. By default the image view will defer to the value from its traitCollection. open var preferredImageDynamicRange: UIImage.DynamicRange /// The resolved treatment to use for HDR images. open var imageDynamicRange: UIImage.DynamicRange { get } This attribute is not marked as being applicable only in iOS 17+ versions. When viewing the UIImageView code in Xcode, the @available(iOS 17.0, *) annotation was not added, which resulted in successful compilation but caused a crash on iOS 16 devices.
3
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119
Sep ’25
UIStepper can't reach min/max value
When I build my project with Xcode 26 the following code makes the stepper decrement option disabled: stepper.stepValue = 0.5 stepper.value = 1.0 stepper.minimumValue = 0.7 stepper.maximumValue = 4.0 I think the reason for this is that the (value - stepValue) goes bellow the minimumValue. But on all iOS versions before iOS 26 this made the decrement option enabled and it clamped the value to the minimumValue. The same issue can be reproduced for the maximumValue. Does anyone else have the same issue? Do we need to adjust the stepValue based on the current value?
1
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144
Sep ’25
Avoid using a segmented control in a toolbar
Hi, in the Human Interface Guidelines, Apple writes: Avoid using a segmented control in a toolbar. Toolbar items act on the current screen — they don’t let people switch contexts like segmented controls do. Along with this image: Source I'm confused by this example. The screenshot seems to be showing a segmented control in a toolbar. Is this saying that the Phone app's All/Missed toggle is different from a segmented control? Under iOS 26 it seems to take a different style compared to a regular segmented control. If so, which component is used to create this filter? Could you please clarify the guidelines? Thank you.
1
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383
Sep ’25
Click on UITextView or UITextField to crash
*** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[__NSCFString timeIntervalSinceReferenceDate]: unrecognized selector sent to instance 0x115fadbc0' *** First throw call stack: (0x1940bd8c8 0x1910097c4 0x194159838 0x19403a4f8 0x1940423a0 0x1e42cb9a8 0x1e42ce220 0x106f02c08 0x1080a461c 0x1080be2b0 0x1080acb2c 0x1080ad7b4 0x1080b9b00 0x1080b91a4 0x1eecdb3b8 0x1eecda8c0) libc++abi: terminating due to uncaught exception of type NSException InputAnalytics called timeIntervalSinceReferenceDate in dispatch_sync.The display issue of the call stack occurs in two stages: keyboard input analysis and folding the keyboard.After adding protection to NSString, it can function normally, but I want to know the reason. #import "NSString+Safe.h" @implementation NSString (Safe) - (NSTimeInterval)timeIntervalSinceReferenceDate { return 0; } - (NSTimeInterval)timeIntervalSinceDate:(NSDate *)date { return 0; } @end
3
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175
Oct ’25
hidesBottomBarWhenPushed is bugged on iOS 26
I am using a common UI pattern: UITabBarController as window root, each tab with a separate UINavigationController stack. I want the (bottom!) tab bar to be only visible when the user is at the root of the app and hide it when a detail page is opened. To do that, I used hidesBottomBarWhenPushed on any view controller that would be pushed on my navigation stacks and that worked fine in the past. But with iOS 26, I am seeing several issues: On iOS where when the bottom tab bar is used, when in a details page and navigating back, the tab bar becomes fully visible immediately instead of slowly animating in as it has been in the past. This is particular visible and annoying when using the "swipe to go back" gesture On iPad, the situation is even worse: On iPadOS 18, the tab bar appeared in the navigation controller's navigation bar - no matter if hidesBottomBarWhenPushed was set or not - fine. But now, with iPadOS 26, this top tab bar disappears when a child is pushed. Not only that, it disappears abruptly, without animation, and the Liquid Glass effect on the UIBarButtonItems is broken as well. There is no transition whatsoever, buttons are simply replaced with the new UIBarButtonItems of the pushed view controller once it became fully visible. It gets even worse when swipe-back navigating on iPadOS: As soon as the back transition starts, the tab bar becomes visible again (without animation), covering the title (view) of the UINavigationController. If the swipe-back transition is not completed the tab bar suddenly stays visible When the swipe-back transition is interrupted close to the end of the transition and it goes back to the pushed view controller, the top UIBarButtonItems are showing a visual glitch where the content (text or icon) stays on the area where the tab bar is, while their container (the glass effect) are on the vertically aligned to the title view. I am surprised that I have not found any similar reports of these problems, so I am wondering if I am doing anything wrong or using hidesBottomBarWhenPushed simply isn't recommended or supported any more.
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365
Nov ’25
How to enable the "Paste and Match Style" context menu in a UITextView?
The UIResponderStandardEditActions protocol includes pasteAndMatchStyle:. UITextView conforms to UIResponderStandardEditActions. But I can't find a way to get that menu to appear. I get the standard "Paste" menu. I've tried overriding pasteAndMatchStyle: in a subclass of UITextView. I've overridden canPerformAction:withSender: but it never gets called with the pasteAndMatchStyle: selector. I've implemented the textView:editMenuForTextInRange:suggestedActions: delegate method. It's called but the suggested actions do not include the "Paste and Match Style" action (key command). I came up with an ugly hack that involved overriding buildMenuWithBuilder: and adding my own key command after the paste command. But this shouldn't be necessary considering it's supposed to be a standard edit action. So what's the trick to make the "Paste and Match Style" edit menu appear properly in a UITextView? I'm testing with iOS 17, 18, and 26.
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226
Sep ’25
Liquid Glass
I think in the next updates of IOS 26 that Apple should add a setting to enable/disable Liquid Glass because we all know that everybody doesnt like the new update.
Topic: Design SubTopic: General Tags:
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867
Sep ’25
View title misaligned after compiling with Xcode 26
After compiling with Xcode 26, my UIKit view's title appears hugging the screen on the left when run on iOS 16-18 (as shown in the image below). It's fine when run on iOS 26, but not older iOS versions. When I compile the same code with Xcode 16.4, the title aligns with the table rows. Has anyone else seen this? Is this a bug in the frameworks or is there something I could do to resolve?
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144
Sep ’25
iPadOS 26 - TableView auto scrolling bug
We are observing that for devices with iPadOS 26, table views within apps are unexpectedly auto scrolling. The issue can be reproduced as follows: The table view has enough cells to the point where not all cells can fit on the screen and the table view is scrollable User has scrolled to the bottom of the tableView and tableView.reloadData() is called. One of the following applies: The ViewController containing the tableView is embedded in a UINavigationController, and ViewController sets self.edgesForExtendedLayout = .bottom The ViewController containing the tableView is embedded in a UINavigationController, and UINavigationController sets navigationBar.isTranslucent = false The following constraints are applied to the tableView: tableView.topAnchor.constraint(equalTo: view.layoutMarginsGuide.topAnchor).isActive = true tableView.leftAnchor.constraint(equalTo: view.leftAnchor).isActive = true tableView.bottomAnchor.constraint(equalTo: view.bottomAnchor).isActive = true tableView.rightAnchor.constraint(equalTo: view.rightAnchor).isActive = true After thorough testing, we've found that the bug is only present in iPads with iPadOS 26. It does not show for iPhone devices or for iPads on iPadOS 18. We are hoping that this can be fixed as it is causing poor user experience. Full code needed to reproduce the issue: Use this willConnectTo function in SceneDelegate: func scene(_ scene: UIScene, willConnectTo session: UISceneSession, options connectionOptions: UIScene.ConnectionOptions) { guard let windowScene = scene as? UIWindowScene else { return } window = UIWindow(windowScene: windowScene) let navigationControllerWithVC = UINavigationController(rootViewController: ViewController()) // ⚠️ CASE 1 - Comment out the .isTranslucent setter below, or set the value to true, and the scrolling issue will be gone, granted that the other issue-causing lines in ViewController.swift // are also commented. navigationControllerWithVC.navigationBar.isTranslucent = false window?.rootViewController = navigationControllerWithVC // Replace this line with window?.rootViewController = ViewController() to get rid of UINavigationController window?.makeKeyAndVisible() } Use this ViewController class that is referenced from the SceneDelegate willConnectTo function: import UIKit class ViewController: UIViewController, UITableViewDelegate, UITableViewDataSource { var tableView: UITableView! var safeArea: UILayoutGuide! var timer: Timer! override func viewDidLoad() { super.viewDidLoad() // ⚠️ CASE 2 - Uncomment the line below when this view is inside a UINavigationController to cause the scrolling issue. //self.edgesForExtendedLayout = .bottom tableView = UITableView() safeArea = view.layoutMarginsGuide setupTableView() timer = Timer.scheduledTimer(timeInterval: 3.0, target: self, selector: #selector(fireTimer), userInfo: nil, repeats: true) } @objc public func fireTimer() { tableView.reloadData() print("Reloaded table") } func setupTableView() { tableView.delegate = self tableView.dataSource = self view.addSubview(tableView) tableView.translatesAutoresizingMaskIntoConstraints = false // ⚠️ CASE 3 - Replace view.topAnchor in the next line below with safeArea.topAnchor to see the scrolling issue, regardless if view is inside a UINavigationController. tableView.topAnchor.constraint(equalTo: view.topAnchor).isActive = true tableView.leftAnchor.constraint(equalTo: view.leftAnchor).isActive = true tableView.bottomAnchor.constraint(equalTo: view.bottomAnchor).isActive = true tableView.rightAnchor.constraint(equalTo: view.rightAnchor).isActive = true } func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int { 40 } public func tableView(_ tableView: UITableView, heightForRowAt indexPath: IndexPath) -> CGFloat { 50.0 } public func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell { let cell = UITableViewCell() cell.textLabel?.text = indexPath.row == 39 ? "END" : "Row \(indexPath.row)" return cell } public func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) { tableView.deselectRow(at: indexPath, animated: true) } } For reproducing this on iPadOS 26 simulators, I can confirm that simulators under Xcode 26.0.1 (17A400) and Xcode 26.1 Beta (17B5025f) will show the issue. The issue is present in iPadOS 26 and iPadOS 26.1 beta. I've also submitted Apple Feedback for this (FB20357980) with all this code in a Xcode project.
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548
Oct ’25
How to intercept or prevent user input in SwiftUI TextField when embedding in UIKit
Hi all, I’m working on a UIKit app where I embed a SwiftUI TextField using UIHostingController. I’m using an ObservableObject model to drive the textfield content: class TextFieldModel: ObservableObject { @Published var text: String @Published var placeholder: String @Published var isSecure: Bool @Published var isFocused: Bool init(pText: String, pPlaceholder: String, pIsSecure: Bool, pIsFocused: Bool) { self.text = pText self.placeholder = pPlaceholder self.isSecure = pIsSecure self.isFocused = pIsFocused } } And my SwiftUI view: struct TextFieldUI: View { @ObservedObject var pModel: TextFieldModel @FocusState private var pIsFocusedState: Bool var body: some View { TextField(pModel.placeholder, text: $pModel.text) .focused($pIsFocusedState) } } I embed it in UIKit like this: let swiftUIContentView = TextFieldUI(pModel: model) let hostingController = UIHostingController(rootView: swiftUIContentView) addChild(hostingController) view.addSubview(hostingController.view) hostingController.didMove(toParent: self) Question: In UIKit, if I subclass UITextField, I can override insertText(_:) and choose not to call super, effectively preventing the textfield from updating when the user types. Is there a SwiftUI equivalent to intercept and optionally prevent user input in a TextField, especially when it’s embedded inside UIKit? What is the recommended approach in SwiftUI for this?
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130
Sep ’25
iOS26: Back button changes appearance when modal screen is shown
I use appearance api to set a custom background image for my navigation bar. At the start color of the back button icon is black. But for some reason color becomes white when new screen is presented modally. My whole project is relied on the appearance api so I cannot remove or replace it. Looks like a bug. The setup code is simple: func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?) -> Bool { // Override point for customization after application launch. setupappearance() return true } func setupappearance() { let navImage = UIImage(named: "new_navigation_background1") let appearance = UINavigationBarAppearance() appearance.configureWithOpaqueBackground() appearance.backgroundImage = navImage UINavigationBar.appearance().scrollEdgeAppearance = appearance UINavigationBar.appearance().standardAppearance = appearance UINavigationBar.appearance().compactAppearance = appearance UINavigationBar.appearance().compactScrollEdgeAppearance = appearance }
Topic: UI Frameworks SubTopic: UIKit Tags:
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3
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0
Views
241
Activity
Oct ’25
Xcode build running into issues
I have been trying to run the ios build and facing issues since last few days. I installed xcode with ios26 and switched to xcode 16.2 beta and now in xcode16.1. My development is blocked as am hitting errors one after the other. Can you point me to any configuration which works ? My development is blocked and its real pain.
Replies
1
Boosts
0
Views
140
Activity
Oct ’25
App Crashes in UICollectionView.m:3974
No Trace of My App is found in Crash Report. The last trace is from UIKitCore. -> Foundation [NSAssertionHandler handleFailureInMethod:object:file:lineNumber:description:] + 288 (NSException.m:252) -> UIKitCore [UICollectionView _createPreparedSupplementaryViewForElementOfKind:atIndexPath:layout:withLayoutAttributes:applyAttributes:] + 1180 (UICollectionView.m:3974) What can be the possible causes for this type of crash?
Topic: UI Frameworks SubTopic: UIKit Tags:
Replies
1
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0
Views
131
Activity
Oct ’25
[iOS 26] Can no longer detect whether iPhone has notch
I'm currently using the extension below to determine whether an iPhone has a notch so I can adjust my UI accordingly. extension UIDevice { var hasNotch: Bool { if userInterfaceIdiom == .phone, let window = (UIApplication.shared.connectedScenes .compactMap { $0 as? UIWindowScene } .flatMap { $0.windows } .first { $0.isKeyWindow }) { return window.safeAreaInsets.bottom > 0 } return false } } (Adapted from https://stackoverflow.com/questions/73946911/how-to-detect-users-device-has-dynamic-island-in-uikit) This no longer works in iOS 26, and I have yet to find a similar method that works. Does anyone have any fixes?
Replies
4
Boosts
0
Views
287
Activity
Oct ’25
XIB Files line seperator = none not be respected in iOS 26.1 ONLY
Hey All, Curious if you guys are seeing the same thing for those who are using Interface Builder Files (Xib) i set the line seperator to none and on my app (built against ios 18 on the app store, but doesnt matter if i build it against ios 26, or ios 26.1) when running on iOS 26.1 the line seperator will show even when i set it to None. Funny enough if i just play around with the XIB file and set it to single line and maybe RED color the IB file will show it but when running it its the same old default dark greyish color. BUT if i set the line seperator in CODE either to be none or with single line + red it looks good when running on sim / device. So it seems to be an issue with XIB files not being respected in iOS 26.1 (only) i have submitted a feed back FB20466783, hope this helps any xcode devs / uikit devs. thank you !
Replies
1
Boosts
0
Views
141
Activity
Oct ’25
Recover iPadOS MenuBar state from different scenes
I’m building a Flutter plugin to access the new menubar API on iPadOS. Everything works fine with a single scene, but I’m running into issues when adding support for multiple scenes: Only odd-numbered windows (first, third, etc.) build their menus correctly. Even-numbered windows ignore the menus sent from Flutter and fall back to a default menubar. When switching between scenes, the last rendered menu always persists instead of updating to the current focus. So far, I’ve: Implemented the plugin as a singleton. Tried to persist menu state per scene, but without success. What would be the recommended approach here? Should I avoid a singleton and manage state entirely per UIScene instance? The project is open-source, and if anyone is willing to take a look, here are the relevant files: /ios/Classes/IpadOSMenubarPlugin.swift /example/ios/Runner/AppDelegate.swift Any guidance would be much appreciated.
Replies
1
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0
Views
126
Activity
Oct ’25
UIScene based state restoration on tvOS not working
I can’t get UIScene-based state restoration to work on tvOS as it does on iOS. UISceneSession.stateRestorationActivity is always nil in UIWindowSceneDelegate.scene(_:willConnectTo:options:) despite UIWindowSceneDelegate.stateRestorationActivity(for:) being called in the previous lifecycle. The NSUserActivityType is correctly configured in the Info.plist. Has anyone encountered the same issue or knows how to get this to work? Sample Project https://github.com/antiraum/tvosSceneStateRestoration Feedback FB20451479
Replies
1
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0
Views
143
Activity
Sep ’25
Using UIDocumentViewController with UISplitViewController in Xcode 26
I created a UIKit Document-Based App in Xcode 26. When using UIDocumentViewController on its own, everything works fine. However, when I try to use it with UISplitViewController or add a Toolbar, I run into an issue: the Sidebar and Toolbar UI remain visible above the Document Browser. Older sample projects show a Document-Based App set up with UISplitViewController, but it seems like with the more recent recommended approach, UISplitViewController may no longer be supported. Is that correct? While I could give up on using a Toolbar, I’d really like to know if there’s still a way to use UISplitViewController together with UIDocumentViewController.
Topic: UI Frameworks SubTopic: UIKit Tags:
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0
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0
Views
80
Activity
Sep ’25
Click on UITextView or UITextField to crash
*** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[__NSCFString timeIntervalSinceReferenceDate]: unrecognized selector sent to instance 0x115fadbc0' *** First throw call stack: (0x1940bd8c8 0x1910097c4 0x194159838 0x19403a4f8 0x1940423a0 0x1e42cb9a8 0x1e42ce220 0x106f02c08 0x1080a461c 0x1080be2b0 0x1080acb2c 0x1080ad7b4 0x1080b9b00 0x1080b91a4 0x1eecdb3b8 0x1eecda8c0) libc++abi: terminating due to uncaught exception of type NSException InputAnalytics called timeIntervalSinceReferenceDate in dispatch_sync.The display issue of the call stack occurs in two stages: keyboard input analysis and folding the keyboard. After adding protection to NSString, it can function normally, but I want to know the reason #import "NSString+Safe.h" @implementation NSString (Safe) - (NSTimeInterval)timeIntervalSinceReferenceDate { return 0; } - (NSTimeInterval)timeIntervalSinceDate:(NSDate *)date { return 0; } @end
Replies
1
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0
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155
Activity
Sep ’25
preferredImageDynamicRange is not marked as being available only for iOS 17 and above.
open var isAnimating: Bool { get } /// The preferred treatment to use for HDR images. By default the image view will defer to the value from its traitCollection. open var preferredImageDynamicRange: UIImage.DynamicRange /// The resolved treatment to use for HDR images. open var imageDynamicRange: UIImage.DynamicRange { get } This attribute is not marked as being applicable only in iOS 17+ versions. When viewing the UIImageView code in Xcode, the @available(iOS 17.0, *) annotation was not added, which resulted in successful compilation but caused a crash on iOS 16 devices.
Replies
3
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0
Views
119
Activity
Sep ’25
UIStepper can't reach min/max value
When I build my project with Xcode 26 the following code makes the stepper decrement option disabled: stepper.stepValue = 0.5 stepper.value = 1.0 stepper.minimumValue = 0.7 stepper.maximumValue = 4.0 I think the reason for this is that the (value - stepValue) goes bellow the minimumValue. But on all iOS versions before iOS 26 this made the decrement option enabled and it clamped the value to the minimumValue. The same issue can be reproduced for the maximumValue. Does anyone else have the same issue? Do we need to adjust the stepValue based on the current value?
Replies
1
Boosts
0
Views
144
Activity
Sep ’25
Avoid using a segmented control in a toolbar
Hi, in the Human Interface Guidelines, Apple writes: Avoid using a segmented control in a toolbar. Toolbar items act on the current screen — they don’t let people switch contexts like segmented controls do. Along with this image: Source I'm confused by this example. The screenshot seems to be showing a segmented control in a toolbar. Is this saying that the Phone app's All/Missed toggle is different from a segmented control? Under iOS 26 it seems to take a different style compared to a regular segmented control. If so, which component is used to create this filter? Could you please clarify the guidelines? Thank you.
Replies
1
Boosts
0
Views
383
Activity
Sep ’25
Keyboard change callback changed on iOS26
There are 2 textfileds. When focus switches between these 2 fields, On iOS18: it will call the keyboardWillShowNotification On iOS26, it will NOT call this keyboardWillShowNotification. Is it a bug or a feature?
Topic: UI Frameworks SubTopic: UIKit Tags:
Replies
1
Boosts
1
Views
234
Activity
Sep ’25
Click on UITextView or UITextField to crash
*** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[__NSCFString timeIntervalSinceReferenceDate]: unrecognized selector sent to instance 0x115fadbc0' *** First throw call stack: (0x1940bd8c8 0x1910097c4 0x194159838 0x19403a4f8 0x1940423a0 0x1e42cb9a8 0x1e42ce220 0x106f02c08 0x1080a461c 0x1080be2b0 0x1080acb2c 0x1080ad7b4 0x1080b9b00 0x1080b91a4 0x1eecdb3b8 0x1eecda8c0) libc++abi: terminating due to uncaught exception of type NSException InputAnalytics called timeIntervalSinceReferenceDate in dispatch_sync.The display issue of the call stack occurs in two stages: keyboard input analysis and folding the keyboard.After adding protection to NSString, it can function normally, but I want to know the reason. #import "NSString+Safe.h" @implementation NSString (Safe) - (NSTimeInterval)timeIntervalSinceReferenceDate { return 0; } - (NSTimeInterval)timeIntervalSinceDate:(NSDate *)date { return 0; } @end
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3
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0
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175
Activity
Oct ’25
hidesBottomBarWhenPushed is bugged on iOS 26
I am using a common UI pattern: UITabBarController as window root, each tab with a separate UINavigationController stack. I want the (bottom!) tab bar to be only visible when the user is at the root of the app and hide it when a detail page is opened. To do that, I used hidesBottomBarWhenPushed on any view controller that would be pushed on my navigation stacks and that worked fine in the past. But with iOS 26, I am seeing several issues: On iOS where when the bottom tab bar is used, when in a details page and navigating back, the tab bar becomes fully visible immediately instead of slowly animating in as it has been in the past. This is particular visible and annoying when using the "swipe to go back" gesture On iPad, the situation is even worse: On iPadOS 18, the tab bar appeared in the navigation controller's navigation bar - no matter if hidesBottomBarWhenPushed was set or not - fine. But now, with iPadOS 26, this top tab bar disappears when a child is pushed. Not only that, it disappears abruptly, without animation, and the Liquid Glass effect on the UIBarButtonItems is broken as well. There is no transition whatsoever, buttons are simply replaced with the new UIBarButtonItems of the pushed view controller once it became fully visible. It gets even worse when swipe-back navigating on iPadOS: As soon as the back transition starts, the tab bar becomes visible again (without animation), covering the title (view) of the UINavigationController. If the swipe-back transition is not completed the tab bar suddenly stays visible When the swipe-back transition is interrupted close to the end of the transition and it goes back to the pushed view controller, the top UIBarButtonItems are showing a visual glitch where the content (text or icon) stays on the area where the tab bar is, while their container (the glass effect) are on the vertically aligned to the title view. I am surprised that I have not found any similar reports of these problems, so I am wondering if I am doing anything wrong or using hidesBottomBarWhenPushed simply isn't recommended or supported any more.
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1
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3
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365
Activity
Nov ’25
How to enable the "Paste and Match Style" context menu in a UITextView?
The UIResponderStandardEditActions protocol includes pasteAndMatchStyle:. UITextView conforms to UIResponderStandardEditActions. But I can't find a way to get that menu to appear. I get the standard "Paste" menu. I've tried overriding pasteAndMatchStyle: in a subclass of UITextView. I've overridden canPerformAction:withSender: but it never gets called with the pasteAndMatchStyle: selector. I've implemented the textView:editMenuForTextInRange:suggestedActions: delegate method. It's called but the suggested actions do not include the "Paste and Match Style" action (key command). I came up with an ugly hack that involved overriding buildMenuWithBuilder: and adding my own key command after the paste command. But this shouldn't be necessary considering it's supposed to be a standard edit action. So what's the trick to make the "Paste and Match Style" edit menu appear properly in a UITextView? I'm testing with iOS 17, 18, and 26.
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2
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0
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226
Activity
Sep ’25
Liquid Glass
I think in the next updates of IOS 26 that Apple should add a setting to enable/disable Liquid Glass because we all know that everybody doesnt like the new update.
Topic: Design SubTopic: General Tags:
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1
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3
Views
867
Activity
Sep ’25
View title misaligned after compiling with Xcode 26
After compiling with Xcode 26, my UIKit view's title appears hugging the screen on the left when run on iOS 16-18 (as shown in the image below). It's fine when run on iOS 26, but not older iOS versions. When I compile the same code with Xcode 16.4, the title aligns with the table rows. Has anyone else seen this? Is this a bug in the frameworks or is there something I could do to resolve?
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1
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0
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144
Activity
Sep ’25
iPadOS 26 - TableView auto scrolling bug
We are observing that for devices with iPadOS 26, table views within apps are unexpectedly auto scrolling. The issue can be reproduced as follows: The table view has enough cells to the point where not all cells can fit on the screen and the table view is scrollable User has scrolled to the bottom of the tableView and tableView.reloadData() is called. One of the following applies: The ViewController containing the tableView is embedded in a UINavigationController, and ViewController sets self.edgesForExtendedLayout = .bottom The ViewController containing the tableView is embedded in a UINavigationController, and UINavigationController sets navigationBar.isTranslucent = false The following constraints are applied to the tableView: tableView.topAnchor.constraint(equalTo: view.layoutMarginsGuide.topAnchor).isActive = true tableView.leftAnchor.constraint(equalTo: view.leftAnchor).isActive = true tableView.bottomAnchor.constraint(equalTo: view.bottomAnchor).isActive = true tableView.rightAnchor.constraint(equalTo: view.rightAnchor).isActive = true After thorough testing, we've found that the bug is only present in iPads with iPadOS 26. It does not show for iPhone devices or for iPads on iPadOS 18. We are hoping that this can be fixed as it is causing poor user experience. Full code needed to reproduce the issue: Use this willConnectTo function in SceneDelegate: func scene(_ scene: UIScene, willConnectTo session: UISceneSession, options connectionOptions: UIScene.ConnectionOptions) { guard let windowScene = scene as? UIWindowScene else { return } window = UIWindow(windowScene: windowScene) let navigationControllerWithVC = UINavigationController(rootViewController: ViewController()) // ⚠️ CASE 1 - Comment out the .isTranslucent setter below, or set the value to true, and the scrolling issue will be gone, granted that the other issue-causing lines in ViewController.swift // are also commented. navigationControllerWithVC.navigationBar.isTranslucent = false window?.rootViewController = navigationControllerWithVC // Replace this line with window?.rootViewController = ViewController() to get rid of UINavigationController window?.makeKeyAndVisible() } Use this ViewController class that is referenced from the SceneDelegate willConnectTo function: import UIKit class ViewController: UIViewController, UITableViewDelegate, UITableViewDataSource { var tableView: UITableView! var safeArea: UILayoutGuide! var timer: Timer! override func viewDidLoad() { super.viewDidLoad() // ⚠️ CASE 2 - Uncomment the line below when this view is inside a UINavigationController to cause the scrolling issue. //self.edgesForExtendedLayout = .bottom tableView = UITableView() safeArea = view.layoutMarginsGuide setupTableView() timer = Timer.scheduledTimer(timeInterval: 3.0, target: self, selector: #selector(fireTimer), userInfo: nil, repeats: true) } @objc public func fireTimer() { tableView.reloadData() print("Reloaded table") } func setupTableView() { tableView.delegate = self tableView.dataSource = self view.addSubview(tableView) tableView.translatesAutoresizingMaskIntoConstraints = false // ⚠️ CASE 3 - Replace view.topAnchor in the next line below with safeArea.topAnchor to see the scrolling issue, regardless if view is inside a UINavigationController. tableView.topAnchor.constraint(equalTo: view.topAnchor).isActive = true tableView.leftAnchor.constraint(equalTo: view.leftAnchor).isActive = true tableView.bottomAnchor.constraint(equalTo: view.bottomAnchor).isActive = true tableView.rightAnchor.constraint(equalTo: view.rightAnchor).isActive = true } func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int { 40 } public func tableView(_ tableView: UITableView, heightForRowAt indexPath: IndexPath) -> CGFloat { 50.0 } public func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell { let cell = UITableViewCell() cell.textLabel?.text = indexPath.row == 39 ? "END" : "Row \(indexPath.row)" return cell } public func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) { tableView.deselectRow(at: indexPath, animated: true) } } For reproducing this on iPadOS 26 simulators, I can confirm that simulators under Xcode 26.0.1 (17A400) and Xcode 26.1 Beta (17B5025f) will show the issue. The issue is present in iPadOS 26 and iPadOS 26.1 beta. I've also submitted Apple Feedback for this (FB20357980) with all this code in a Xcode project.
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5
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0
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548
Activity
Oct ’25
How to intercept or prevent user input in SwiftUI TextField when embedding in UIKit
Hi all, I’m working on a UIKit app where I embed a SwiftUI TextField using UIHostingController. I’m using an ObservableObject model to drive the textfield content: class TextFieldModel: ObservableObject { @Published var text: String @Published var placeholder: String @Published var isSecure: Bool @Published var isFocused: Bool init(pText: String, pPlaceholder: String, pIsSecure: Bool, pIsFocused: Bool) { self.text = pText self.placeholder = pPlaceholder self.isSecure = pIsSecure self.isFocused = pIsFocused } } And my SwiftUI view: struct TextFieldUI: View { @ObservedObject var pModel: TextFieldModel @FocusState private var pIsFocusedState: Bool var body: some View { TextField(pModel.placeholder, text: $pModel.text) .focused($pIsFocusedState) } } I embed it in UIKit like this: let swiftUIContentView = TextFieldUI(pModel: model) let hostingController = UIHostingController(rootView: swiftUIContentView) addChild(hostingController) view.addSubview(hostingController.view) hostingController.didMove(toParent: self) Question: In UIKit, if I subclass UITextField, I can override insertText(_:) and choose not to call super, effectively preventing the textfield from updating when the user types. Is there a SwiftUI equivalent to intercept and optionally prevent user input in a TextField, especially when it’s embedded inside UIKit? What is the recommended approach in SwiftUI for this?
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0
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0
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130
Activity
Sep ’25