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ExcUserFault and corrupted data when using UIImage#heicData
Over the last two weeks, I’ve had sporadic reports from users who suddenly have a corrupt image in the database for my app. It’s only affecting a few users and may possibly have been fixed with iOS 26.4.1 (I’m not sure). In any case, this started suddenly with the release of iOS 26.4 - our app has not been changed in several months. But I wanted to share what’s happening in case others are experiencing this. My app lets users import photos from the camera roll, photo albums, etc. Once the user has selected an image, the app saves this to a SQLite3 database using “image.heicData()”. For the four or five users who have been affected by this problem, the heicData call returns successfully, with a non-nil Data value. But the image itself is corrupt and unreadable. When the user tries to later open a screen containing the image, the app crashes. I’ve had to manually guide each user through tracking down and removing the affected item or items to resolve it, which is a bad experience for them and time-consuming for us. Our app crashes when it tries to read the image (using “UIImage(data: heicData)”). All users who have this problem have had an ExcUserFault file in their crash reports with our app name in it. It's not possible to symbolicate this file but i've included an excerpt at the bottom of this post: I was able to extract some raw data saved when this error occurs. When you run “file corrupt_image.heic”, you get: AmigaOS bitmap font "rtypheic", fc_YSize 0, 35001 elements which definitely doesn’t seem right. On a valid HEIC file, i get: ISO Media, HEIF Image HEVC Main or Main Still Picture Profile Is anyone else experience this? Or does anyone else have any suggestions about what could be happening? I submitted feedback FB22667639 about this. ExcUserFault example Exception Type: EXC_GUARD Exception Subtype: GUARD_TYPE_USER Exception Message: namespc 7 reason_code 0x0000000000000009 Exception Codes: 0x6000000000000007, 0x0000000000000009 Termination Reason: Namespace LIBXPC, Code 9, XPC_EXIT_REASON_FAULT Thread 0: 0 ??? 0x231fa997c 0x180000000 + 2985990524 1 ??? 0x197eb98b4 0x180000000 + 401316020 2 ??? 0x197ec4e04 0x180000000 + 401362436 3 ??? 0x197ec5ea0 0x180000000 + 401366688 4 ??? 0x19066bdb8 0x180000000 + 275168696 5 ??? 0x19066b968 0x180000000 + 275167592 6 ??? 0x19b5c19a4 0x180000000 + 459020708 7 ??? 0x19b5cfa2c 0x180000000 + 459078188 8 ??? 0x19b5cf838 0x180000000 + 459077688 9 ??? 0x197ec7c74 0x180000000 + 401374324 10 ??? 0x197ec991c 0x180000000 + 401381660 11 ??? 0x1bd74222c 0x180000000 + 1031021100 12 ??? 0x1bd744ba4 0x180000000 + 1031031716 13 ??? 0x1bd730e18 0x180000000 + 1030950424 14 ??? 0x1bd7458f8 0x180000000 + 1031035128 15 ??? 0x1bd730e18 0x180000000 + 1030950424 16 ??? 0x1bd731ae4 0x180000000 + 1030953700 17 ??? 0x1bd73bdac 0x180000000 + 1030995372 18 ??? 0x1bd73b6ac 0x180000000 + 1030993580 19 ??? 0x1e23283b0 0x180000000 + 1647477680 20 ??? 0x1e23278c0 0x180000000 + 1647474880
2
0
220
2d
Layer to SVG script
In the video ”Create Icons with Icon Composer”, the presenter mentions that Apple has created a layer-to-SVG script for Illustrator that‘s available for download: Once the artwork is in a good place, next we want to export the layers as SVGs. For every tool, this can look a bit different. For those using Illustrator, we've created a layer to SVG script that will automate this for you, which you can download. Exporting out the canvas size ensures everything drops right into position in Icon Composer. Here‘s the link to the mention: https://developer.apple.com/videos/play/wwdc2025/361/?time=377 I can’t find any place to get this script, and my designer is very interested in using it to import our Illustrator icon into Icon Composer. Can someone point me to it?
Topic: Design SubTopic: General
2
3
2.1k
1w
Timing issue with updating two state variables
I have a SwiftUI view with: @State var url: URL? @State var isShowingBrowser: Bool func displayURL(url: URL) { self.url = url self.isShowingBrowser = true } var body: some View { Group { // ...... } .sheet(isPresented: $isShowingBrowser) { // browser view } } The first time I call displayBrowser, an empty browser sheet appears, with no URL. The second time, it works. It doesn't matter if I reorder the assignments in displayURL. It's like the view refreshes once with a nil URL and isShowingBrowser true, then refreshes again with the URL value. If I move both variable to an @Observable view model class then it works fine - that update seems to happen atomically. For my own project, the view model is the right way to do this, but I was confused by this behavior. What am I missing about SwiftUI?
Topic: UI Frameworks SubTopic: SwiftUI
0
0
153
1w
Potential Structural Swift Concurrency Issue: unsafeForcedSync called from Swift Concurrent context
I occasionally get this error in Xcode’s console: Potential Structural Swift Concurrency Issue: unsafeForcedSync called from Swift Concurrent context. What does this mean, and how can I resolve it? Googling it doesn’t turn up any results. This doesn't crash the app - it’s just an error diagnostic that I see in the Xcode console. The app keeps running before and after the issue. Is there a way I can set a breakpoint to catch this where it happens?
9
2
3.6k
Mar ’26
Getting a list of deleted CloudKit records with an expired change token
Usually, when you call fetchRecordZoneChanges with the previous change token, you get a list of the record ID’s that have been deleted since your last fetch. But if you get a changeTokenExpired error because it‘s been too long since you last fetched, you have to call fetch again without a token. For my specific application, I still need to know, though, if any records have been deleted since my last sync. How can I get that information if I no longer have a valid change token?
7
0
603
Feb ’26
Using a local model for Xcode Assist
Hi, I'm interested in trying out Xcode Assist to help with things like complicated refactors or writing tests cases. The ChatGPT and Claude options both share your code with third parties, which is not acceptable for my use case. Has anyone used a fully local model for Xcode Assist? I see that you can select one in the Apple Intelligence section of Xcode's Preferences screen, but don't really know where to start. Are there local models that work well with Xcode Assist and that truly keep your source code private?
1
0
519
Dec ’25
Change to safe area logic on iOS 26
I have a few view controllers in a large UIKit application that previously started showing content right below the bottom of the top navigation toolbar. When testing the same code on iOS 26, these same views have their content extend under the navigation bar and toolbar. I was able to fix it with: if #available(iOS 26, *, *) { self.edgesForExtendedLayout = [.bottom] } when running on iOS 26. I also fixed one or two places where the main view was anchored to self.view.topAnchor instead of self.view.safeAreaLayoutGuide.topAnchor. Although this seems to work, I wonder if this was an intended change in iOS 26 or just a temporary bug in the beta that will be resolved. Were changes made to the safe area and edgesForExtendedLayout logic in iOS 26? If so, is there a place I can see what the specific changes were, so I know my code is handling it properly? Thanks!
Topic: UI Frameworks SubTopic: UIKit
7
6
1.9k
Nov ’25
Does Foundation Models ever do off-device computation?
I want to use Foundation Models in a project, but I know my users will want to avoid environmentally intensive AI work in data centers. Does Foundation Models ever use Private Compute Cloud or any other kind of cloud-based AI system? I'd like to be able to assure my users that the LLM usage is relatively environmentally friendly. It would be great to be able to cite a specific Apple page explaining that Foundation Models work is always done locally. If there's any chance that work can be done in the cloud, is there a way to opt out of that?
2
0
386
Oct ’25
Toolbar tint color with Liquid Glass
I'm adapting a UIKit app to work with Liquid Glass. In pre-Liquid Glass days, the application window had a tintColor that was passed down to all of its descendant views, resulting in toolbar buttons that match the app's color scheme. In iOS 26, my toolbar buttons are always black, no matter what. I've tried setting the UIBarButtonItem#tintColor on the button and setting UIBarButtonAppearanc#tintColor. The buttons are still black. What am I doing wrong? I see a tintColor modifier for SwiftUI toolbar buttons, so it seems like maybe you can do this with SwiftUI. Many of the built-in apps on iOS 26 beta have only black toolbar buttons - is it not possible to change the toolbar button tint color on iOS 26?
Topic: UI Frameworks SubTopic: General
1
0
578
Aug ’25
Can I give additional context to Foundation Models?
I'm interested in using Foundation Models to act as an AI support agent for our extensive in-app documentation. We have many pages of in-app documents, which the user can currently search, but it would be great to use Foundation Models to let the user get answers to arbitrary questions. Is this possible with the current version of Foundation Models? It seems like the way to add new context to the model is with the instructions parameter on LanguageModelSession. As I understand it, the combined instructions and prompt need to consume less than 4096 tokens. That definitely wouldn't be enough for the amount of documentation I want the agent to be able to refer to. Is there another way of doing this, maybe as a series of recursive queries? If there is a solution based on multiple queries, should I expect this to be fast enough for interactive use?
4
0
407
Jul ’25
In iOS 26, the tab bar never disappears when new controller is pushed
In my app, I have a tab bar controller whose first tab is a navigation controller. Taking a certain action in that controller will push a new controller onto the navigation stack. The new controller has hidesBottomBarWhenPushed set to true, which hides the tab bar and shows the new controller's toolbar. It's worked like this for years. But in the iOS 26 simulator (I don't have the beta installed on any physical iPhones yet), when I tried this behavior in my app, I instead saw: the tab bar remained exactly where it was when I pushed the new controller the toolbar never appeared at all and all of its buttons were inaccessible If you set the deployment target to iOS 18 and run the code in an iOS 18 simulator: when you tap "Tap Me", the new controller is pushed onto the screen simultaneously, the tab bar hides and the second controller's toolbar appears. If you set the deployment target to iOS 26 and run the code in an iOS 26 simulator: when you tap "Tap Me", the new controller is pushed onto the screen the toolbar never appears and the tab bar remains unchanged after the push animation completes Is this a bug in the iOS 26 beta, or is it an intentional behavior change in how hidesBottomBarWhenPushed works in these cases? Below is sample code that reproduces the problem: class TabController: UIViewController { override func viewDidLoad() { super.viewDidLoad() let button = UIButton(type: .roundedRect, primaryAction: UIAction(title: "Test Action") { action in let newController = SecondaryController() self.navigationController!.pushViewController(newController, animated: true) }) button.setTitle("Tap Me", for: .normal) button.translatesAutoresizingMaskIntoConstraints = false self.view.addSubview(button) NSLayoutConstraint.activate([ self.view.centerXAnchor.constraint(equalTo: button.centerXAnchor), self.view.centerYAnchor.constraint(equalTo: button.centerYAnchor), ]) } } class SecondaryController: UIViewController { override func loadView() { super.loadView() self.toolbarItems = [ UIBarButtonItem(image: UIImage(systemName: "plus"), style: .plain, target: nil, action: nil) ] } override func viewWillAppear(_ animated: Bool) { super.viewWillAppear(animated) self.navigationController?.isToolbarHidden = false } } class SceneDelegate: UIResponder, UIWindowSceneDelegate { var window: UIWindow? var tabController: UITabBarController? func scene(_ scene: UIScene, willConnectTo session: UISceneSession, options connectionOptions: UIScene.ConnectionOptions) { guard let windowScene = (scene as? UIWindowScene) else { return } let tab1 = UITab(title: "Test 1", image: UIImage(systemName: "globe"), identifier: "test1") { _ in UINavigationController(rootViewController: TabController()) } let tab2 = UITab(title: "Test 2", image: UIImage(systemName: "globe"), identifier: "test2") { _ in UINavigationController(rootViewController: TabController()) } window = UIWindow(windowScene: windowScene) self.tabController = UITabBarController(tabs: [tab1, tab2]) self.window!.rootViewController = self.tabController self.window!.makeKeyAndVisible() } }
Topic: UI Frameworks SubTopic: UIKit Tags:
2
1
637
Jul ’25
Safe way to query for the existence of a CKRecordZone?
There's some logic in my app that first checks to see if a specific CloudKit record zone exists. If it doesn't, it creates the zone, and then my application continues on with its work. The way I've implemented this right now is by catching the zoneNotFound error when I call CKDatabase#recordZone(for:) (docs) and creating the zone when that happens: do { try await db.recordZone(for: zoneID) } catch let ckError as CKError where [.zoneNotFound, .userDeletedZone].contains(ckError.code) { // createZone is a helper function try await createZone(zoneID: zoneID, context: context) } This works great, but every time I do this, an error is logged in CloudKit Console, which creates a lot of noise and makes it harder to see real errors. Is there a way to do this without explicitly triggering a CloudKit error? I just found CKDatabase#recordZones(for:) (docs), which seems like it returns an empty array instead of throwing an error if the zone doesn't exist. Will calling that and looking for a non-empty array work just as well, but without logging lots of errors in the console?
1
0
229
Apr ’25
UIContextMenuInteraction not working if view is originally offscreen
I’m having a weird UIKit problem. I have a bunch of views in a UIScrollView and I add a UIContextMenuInteraction to all of them when the view is first loaded. Because they're in a scroll view, only some of the views are initially visible. The interaction works great for any of the views that are initially on-screen, but if I scroll to reveal new subviews, the context menu interaction has no effect for those. I used Xcode's View Debugger to confirm that my interaction is still saved in the view's interactions property, even for views that were initially off-screen and were then scrolled in. What could be happening here?
Topic: UI Frameworks SubTopic: UIKit Tags:
0
0
126
Mar ’25
ExcUserFault and corrupted data when using UIImage#heicData
Over the last two weeks, I’ve had sporadic reports from users who suddenly have a corrupt image in the database for my app. It’s only affecting a few users and may possibly have been fixed with iOS 26.4.1 (I’m not sure). In any case, this started suddenly with the release of iOS 26.4 - our app has not been changed in several months. But I wanted to share what’s happening in case others are experiencing this. My app lets users import photos from the camera roll, photo albums, etc. Once the user has selected an image, the app saves this to a SQLite3 database using “image.heicData()”. For the four or five users who have been affected by this problem, the heicData call returns successfully, with a non-nil Data value. But the image itself is corrupt and unreadable. When the user tries to later open a screen containing the image, the app crashes. I’ve had to manually guide each user through tracking down and removing the affected item or items to resolve it, which is a bad experience for them and time-consuming for us. Our app crashes when it tries to read the image (using “UIImage(data: heicData)”). All users who have this problem have had an ExcUserFault file in their crash reports with our app name in it. It's not possible to symbolicate this file but i've included an excerpt at the bottom of this post: I was able to extract some raw data saved when this error occurs. When you run “file corrupt_image.heic”, you get: AmigaOS bitmap font "rtypheic", fc_YSize 0, 35001 elements which definitely doesn’t seem right. On a valid HEIC file, i get: ISO Media, HEIF Image HEVC Main or Main Still Picture Profile Is anyone else experience this? Or does anyone else have any suggestions about what could be happening? I submitted feedback FB22667639 about this. ExcUserFault example Exception Type: EXC_GUARD Exception Subtype: GUARD_TYPE_USER Exception Message: namespc 7 reason_code 0x0000000000000009 Exception Codes: 0x6000000000000007, 0x0000000000000009 Termination Reason: Namespace LIBXPC, Code 9, XPC_EXIT_REASON_FAULT Thread 0: 0 ??? 0x231fa997c 0x180000000 + 2985990524 1 ??? 0x197eb98b4 0x180000000 + 401316020 2 ??? 0x197ec4e04 0x180000000 + 401362436 3 ??? 0x197ec5ea0 0x180000000 + 401366688 4 ??? 0x19066bdb8 0x180000000 + 275168696 5 ??? 0x19066b968 0x180000000 + 275167592 6 ??? 0x19b5c19a4 0x180000000 + 459020708 7 ??? 0x19b5cfa2c 0x180000000 + 459078188 8 ??? 0x19b5cf838 0x180000000 + 459077688 9 ??? 0x197ec7c74 0x180000000 + 401374324 10 ??? 0x197ec991c 0x180000000 + 401381660 11 ??? 0x1bd74222c 0x180000000 + 1031021100 12 ??? 0x1bd744ba4 0x180000000 + 1031031716 13 ??? 0x1bd730e18 0x180000000 + 1030950424 14 ??? 0x1bd7458f8 0x180000000 + 1031035128 15 ??? 0x1bd730e18 0x180000000 + 1030950424 16 ??? 0x1bd731ae4 0x180000000 + 1030953700 17 ??? 0x1bd73bdac 0x180000000 + 1030995372 18 ??? 0x1bd73b6ac 0x180000000 + 1030993580 19 ??? 0x1e23283b0 0x180000000 + 1647477680 20 ??? 0x1e23278c0 0x180000000 + 1647474880
Replies
2
Boosts
0
Views
220
Activity
2d
Layer to SVG script
In the video ”Create Icons with Icon Composer”, the presenter mentions that Apple has created a layer-to-SVG script for Illustrator that‘s available for download: Once the artwork is in a good place, next we want to export the layers as SVGs. For every tool, this can look a bit different. For those using Illustrator, we've created a layer to SVG script that will automate this for you, which you can download. Exporting out the canvas size ensures everything drops right into position in Icon Composer. Here‘s the link to the mention: https://developer.apple.com/videos/play/wwdc2025/361/?time=377 I can’t find any place to get this script, and my designer is very interested in using it to import our Illustrator icon into Icon Composer. Can someone point me to it?
Topic: Design SubTopic: General
Replies
2
Boosts
3
Views
2.1k
Activity
1w
Timing issue with updating two state variables
I have a SwiftUI view with: @State var url: URL? @State var isShowingBrowser: Bool func displayURL(url: URL) { self.url = url self.isShowingBrowser = true } var body: some View { Group { // ...... } .sheet(isPresented: $isShowingBrowser) { // browser view } } The first time I call displayBrowser, an empty browser sheet appears, with no URL. The second time, it works. It doesn't matter if I reorder the assignments in displayURL. It's like the view refreshes once with a nil URL and isShowingBrowser true, then refreshes again with the URL value. If I move both variable to an @Observable view model class then it works fine - that update seems to happen atomically. For my own project, the view model is the right way to do this, but I was confused by this behavior. What am I missing about SwiftUI?
Topic: UI Frameworks SubTopic: SwiftUI
Replies
0
Boosts
0
Views
153
Activity
1w
Potential Structural Swift Concurrency Issue: unsafeForcedSync called from Swift Concurrent context
I occasionally get this error in Xcode’s console: Potential Structural Swift Concurrency Issue: unsafeForcedSync called from Swift Concurrent context. What does this mean, and how can I resolve it? Googling it doesn’t turn up any results. This doesn't crash the app - it’s just an error diagnostic that I see in the Xcode console. The app keeps running before and after the issue. Is there a way I can set a breakpoint to catch this where it happens?
Replies
9
Boosts
2
Views
3.6k
Activity
Mar ’26
Getting a list of deleted CloudKit records with an expired change token
Usually, when you call fetchRecordZoneChanges with the previous change token, you get a list of the record ID’s that have been deleted since your last fetch. But if you get a changeTokenExpired error because it‘s been too long since you last fetched, you have to call fetch again without a token. For my specific application, I still need to know, though, if any records have been deleted since my last sync. How can I get that information if I no longer have a valid change token?
Replies
7
Boosts
0
Views
603
Activity
Feb ’26
Using a local model for Xcode Assist
Hi, I'm interested in trying out Xcode Assist to help with things like complicated refactors or writing tests cases. The ChatGPT and Claude options both share your code with third parties, which is not acceptable for my use case. Has anyone used a fully local model for Xcode Assist? I see that you can select one in the Apple Intelligence section of Xcode's Preferences screen, but don't really know where to start. Are there local models that work well with Xcode Assist and that truly keep your source code private?
Replies
1
Boosts
0
Views
519
Activity
Dec ’25
Change to safe area logic on iOS 26
I have a few view controllers in a large UIKit application that previously started showing content right below the bottom of the top navigation toolbar. When testing the same code on iOS 26, these same views have their content extend under the navigation bar and toolbar. I was able to fix it with: if #available(iOS 26, *, *) { self.edgesForExtendedLayout = [.bottom] } when running on iOS 26. I also fixed one or two places where the main view was anchored to self.view.topAnchor instead of self.view.safeAreaLayoutGuide.topAnchor. Although this seems to work, I wonder if this was an intended change in iOS 26 or just a temporary bug in the beta that will be resolved. Were changes made to the safe area and edgesForExtendedLayout logic in iOS 26? If so, is there a place I can see what the specific changes were, so I know my code is handling it properly? Thanks!
Topic: UI Frameworks SubTopic: UIKit
Replies
7
Boosts
6
Views
1.9k
Activity
Nov ’25
CloudKit Console and Unique Users
The CloudKit Console includes a Unique Users table in the Usage section. The numbers here are lower than what I would expect. Does this only track a certain percentage of users, e.g. users have opted in to share analytics with developers?
Replies
1
Boosts
0
Views
375
Activity
Oct ’25
Does Foundation Models ever do off-device computation?
I want to use Foundation Models in a project, but I know my users will want to avoid environmentally intensive AI work in data centers. Does Foundation Models ever use Private Compute Cloud or any other kind of cloud-based AI system? I'd like to be able to assure my users that the LLM usage is relatively environmentally friendly. It would be great to be able to cite a specific Apple page explaining that Foundation Models work is always done locally. If there's any chance that work can be done in the cloud, is there a way to opt out of that?
Replies
2
Boosts
0
Views
386
Activity
Oct ’25
Toolbar tint color with Liquid Glass
I'm adapting a UIKit app to work with Liquid Glass. In pre-Liquid Glass days, the application window had a tintColor that was passed down to all of its descendant views, resulting in toolbar buttons that match the app's color scheme. In iOS 26, my toolbar buttons are always black, no matter what. I've tried setting the UIBarButtonItem#tintColor on the button and setting UIBarButtonAppearanc#tintColor. The buttons are still black. What am I doing wrong? I see a tintColor modifier for SwiftUI toolbar buttons, so it seems like maybe you can do this with SwiftUI. Many of the built-in apps on iOS 26 beta have only black toolbar buttons - is it not possible to change the toolbar button tint color on iOS 26?
Topic: UI Frameworks SubTopic: General
Replies
1
Boosts
0
Views
578
Activity
Aug ’25
Can I give additional context to Foundation Models?
I'm interested in using Foundation Models to act as an AI support agent for our extensive in-app documentation. We have many pages of in-app documents, which the user can currently search, but it would be great to use Foundation Models to let the user get answers to arbitrary questions. Is this possible with the current version of Foundation Models? It seems like the way to add new context to the model is with the instructions parameter on LanguageModelSession. As I understand it, the combined instructions and prompt need to consume less than 4096 tokens. That definitely wouldn't be enough for the amount of documentation I want the agent to be able to refer to. Is there another way of doing this, maybe as a series of recursive queries? If there is a solution based on multiple queries, should I expect this to be fast enough for interactive use?
Replies
4
Boosts
0
Views
407
Activity
Jul ’25
In iOS 26, the tab bar never disappears when new controller is pushed
In my app, I have a tab bar controller whose first tab is a navigation controller. Taking a certain action in that controller will push a new controller onto the navigation stack. The new controller has hidesBottomBarWhenPushed set to true, which hides the tab bar and shows the new controller's toolbar. It's worked like this for years. But in the iOS 26 simulator (I don't have the beta installed on any physical iPhones yet), when I tried this behavior in my app, I instead saw: the tab bar remained exactly where it was when I pushed the new controller the toolbar never appeared at all and all of its buttons were inaccessible If you set the deployment target to iOS 18 and run the code in an iOS 18 simulator: when you tap "Tap Me", the new controller is pushed onto the screen simultaneously, the tab bar hides and the second controller's toolbar appears. If you set the deployment target to iOS 26 and run the code in an iOS 26 simulator: when you tap "Tap Me", the new controller is pushed onto the screen the toolbar never appears and the tab bar remains unchanged after the push animation completes Is this a bug in the iOS 26 beta, or is it an intentional behavior change in how hidesBottomBarWhenPushed works in these cases? Below is sample code that reproduces the problem: class TabController: UIViewController { override func viewDidLoad() { super.viewDidLoad() let button = UIButton(type: .roundedRect, primaryAction: UIAction(title: "Test Action") { action in let newController = SecondaryController() self.navigationController!.pushViewController(newController, animated: true) }) button.setTitle("Tap Me", for: .normal) button.translatesAutoresizingMaskIntoConstraints = false self.view.addSubview(button) NSLayoutConstraint.activate([ self.view.centerXAnchor.constraint(equalTo: button.centerXAnchor), self.view.centerYAnchor.constraint(equalTo: button.centerYAnchor), ]) } } class SecondaryController: UIViewController { override func loadView() { super.loadView() self.toolbarItems = [ UIBarButtonItem(image: UIImage(systemName: "plus"), style: .plain, target: nil, action: nil) ] } override func viewWillAppear(_ animated: Bool) { super.viewWillAppear(animated) self.navigationController?.isToolbarHidden = false } } class SceneDelegate: UIResponder, UIWindowSceneDelegate { var window: UIWindow? var tabController: UITabBarController? func scene(_ scene: UIScene, willConnectTo session: UISceneSession, options connectionOptions: UIScene.ConnectionOptions) { guard let windowScene = (scene as? UIWindowScene) else { return } let tab1 = UITab(title: "Test 1", image: UIImage(systemName: "globe"), identifier: "test1") { _ in UINavigationController(rootViewController: TabController()) } let tab2 = UITab(title: "Test 2", image: UIImage(systemName: "globe"), identifier: "test2") { _ in UINavigationController(rootViewController: TabController()) } window = UIWindow(windowScene: windowScene) self.tabController = UITabBarController(tabs: [tab1, tab2]) self.window!.rootViewController = self.tabController self.window!.makeKeyAndVisible() } }
Topic: UI Frameworks SubTopic: UIKit Tags:
Replies
2
Boosts
1
Views
637
Activity
Jul ’25
How do I install the iOS 26 beta 2 simulator?
I can see that iOS beta 2 was released yesterday. I'm not running the beta yet on my actual iPhone, but I wanted to see if an issue I reported in beta 1 was fixed. Is there a way to update my iOS 26 simulator for beta 2? Usually, there's a new Xcode download that includes the new simulator, but it looks like the most recent Xcode beta release was June 9.
Replies
2
Boosts
1
Views
661
Activity
Jun ’25
Safe way to query for the existence of a CKRecordZone?
There's some logic in my app that first checks to see if a specific CloudKit record zone exists. If it doesn't, it creates the zone, and then my application continues on with its work. The way I've implemented this right now is by catching the zoneNotFound error when I call CKDatabase#recordZone(for:) (docs) and creating the zone when that happens: do { try await db.recordZone(for: zoneID) } catch let ckError as CKError where [.zoneNotFound, .userDeletedZone].contains(ckError.code) { // createZone is a helper function try await createZone(zoneID: zoneID, context: context) } This works great, but every time I do this, an error is logged in CloudKit Console, which creates a lot of noise and makes it harder to see real errors. Is there a way to do this without explicitly triggering a CloudKit error? I just found CKDatabase#recordZones(for:) (docs), which seems like it returns an empty array instead of throwing an error if the zone doesn't exist. Will calling that and looking for a non-empty array work just as well, but without logging lots of errors in the console?
Replies
1
Boosts
0
Views
229
Activity
Apr ’25
UIContextMenuInteraction not working if view is originally offscreen
I’m having a weird UIKit problem. I have a bunch of views in a UIScrollView and I add a UIContextMenuInteraction to all of them when the view is first loaded. Because they're in a scroll view, only some of the views are initially visible. The interaction works great for any of the views that are initially on-screen, but if I scroll to reveal new subviews, the context menu interaction has no effect for those. I used Xcode's View Debugger to confirm that my interaction is still saved in the view's interactions property, even for views that were initially off-screen and were then scrolled in. What could be happening here?
Topic: UI Frameworks SubTopic: UIKit Tags:
Replies
0
Boosts
0
Views
126
Activity
Mar ’25