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Change app language on Apple Watch simulator
I feel a bit dumb now. I once succeeded to change the language of an app on Watch simulator. So it is possible. And I'm not able to repeat (fool of me I did not took note of how I did it). I just remember it was simply through some language settings selection, may be rebooting the Mac, but not by changing anything in code. Does someone know how to do ?
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515
Mar ’25
Immediate crash of Apple Watch simulator when typing a key
I get a crash in Apple Watch simulator (Series 9 45mm 18.0) as soon as the app launch if I type anything on external keyboard (just hitting command key for instance to capture a screenshot). Same crash on series 7 (45mm, OS 18.1) But app works normally when I use mouse to interact with the app on simulator. App does not crash on real device (Watch 4 OS 10.4.1). Nor does it crash on Series 6 simulator (44 mm OS 17.4). Here are the log I could collect (apparently, they contain sensitive language !!! so I attach as a file.: Attached logs
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439
Mar ’25
Developing a driver to read HFS disks on MacOS Sonoma and newer
Capability to read and write ofd HFS disks on Mac has been removed since a long time. Capability to simply read was also removed since Catalina I think. That is surprising and sometimes frustrating. I still use a 90's MacBook for a few tasks and need from time to time to transfer files to newer Mac or read some old files stored on 3.5" disks. Solution I use is to read the disk on an old Mac with MacOS 10.6 (I'm lucky enough to have kept one) and transfer to USB stick or airdrop… As there is no USB port on the Macbook of course (and I have no more a working 56k modem to transfer by mail), only option if not 3,5" disk is using PCMCIA port on the MacBook for writing to an SD Card to be read in Mac Sonoma. But reading directly 3.5" disk would be great. Hence my questions for the forum: how hard would it be to write such a driver for READING only HFS on Mac Sonoma? There are some software like FuseHFS. Did anyone experience it ? Did anyone have a look at the source code (said to be open source). does anyone know why Apple removed such capability (I thought it was a tiny piece of code compared to the GB of present MacOS)? Thanks for any insights on the matter.
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Mar ’25
tableView.dequeueReusableHeaderFooterView(withIdentifier: ) crashes on iPad only
I have created a custom class: class TarifsHeaderFooterView: UITableViewHeaderFooterView { …} With its init: override init(reuseIdentifier: String?) { super.init(reuseIdentifier: reuseIdentifier) configureContents() } I register the custom header view in viewDidLoad of the class using the tableView. Table delegate and data source are defined in storyboard. tarifsTableView.register(TarifsHeaderFooterView.self, forHeaderFooterViewReuseIdentifier: headerTarifsIdentifier) And call it: func tableView(_ tableView: UITableView, viewForHeaderInSection section: Int) -> UIView? { let view = tableView.dequeueReusableHeaderFooterView(withIdentifier: headerTarifsIdentifier) as! TarifsHeaderFooterView That works on iPhone (simulators and devices). But it crashes on any iPad simulator, as tableView.dequeueReusableHeaderFooterView(withIdentifier: headerTarifsIdentifier) is found nil. What difference between iPhone and iPad do I miss that explains this crash ? PS: sorry for the messy message. It looks like the new "feature" of the forum to put a Copy code button on the code parts, causes the code sections to be put at the very end of the post, not at the place they should be.
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Mar ’25
Is a spam an appreciated participation in the forums ?
There are at the moment a lot of spams for a bank phone number. https://developer.apple.com/forums/thread/769506 What is really surprising is to read App Store Connect Engineer answer, each time the same: We appreciate your interest in participating in the forums! These forums are for questions about developing software and accessories for Apple platforms. Your question seems related to a consumer feature and is better suited for the Apple Support Communities Is it an automatic answer (I cannot believe anyone who read the post did not notice it was a spam) ? If so, couldn't it simply detect it is a spam (Apple Intelligence could come to help) and delete the message (or the account) ? PS: it would also be a spam in Apple Support Communities PS2: I note the message has been deleted very rapidly.
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1.1k
Apr ’25
Capturing self instead of using self. in switch case in DispatchQueue causes compiler error
I have an @objC used for notification. kTag is an Int constant, fieldBeingEdited is an Int variable. The following code fails at compilation with error: Command CompileSwift failed with a nonzero exit code if I capture self (I edited code, to have minimal case) @objc func keyboardDone(_ sender : UIButton) { DispatchQueue.main.async { [self] () -> Void in switch fieldBeingEdited { case kTag : break default : break } } } If I explicitly use self, it compiles, even with self captured: @objc func keyboardDone(_ sender : UIButton) { DispatchQueue.main.async { [self] () -> Void in switch fieldBeingEdited { // <<-- no need for self here case self.kTag : break // <<-- self here default : break } } } This compiles as well: @objc func keyboardDone(_ sender : UIButton) { DispatchQueue.main.async { () -> Void in switch self.fieldBeingEdited { // <<-- no need for self here case self.kTag : break // <<-- self here default : break } } } Is it a compiler bug or am I missing something ?
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426
Jun ’25
No more simulators showing in Xcode
I sometimes use Xcode 14.2. Recently, I have an issue with simulators: on some SwiftUI project, the simulator list is empty. I created a new project. I see the complete list of simulators, but when running for a simulator, it fails with following diag; Same error with UIKit project. Details Unable to boot the Simulator. Domain: NSPOSIXErrorDomain Code: 60 Failure Reason: launchd failed to respond. User Info: { DVTErrorCreationDateKey = "2025-06-29 06:16:35 +0000"; IDERunOperationFailingWorker = "_IDEInstalliPhoneSimulatorWorker"; Session = "com.apple.CoreSimulator.SimDevice.134EC197-BA6B-45DF-B5B2-61A1D4F14863"; } -- Failed to start launchd_sim: could not bind to session, launchd_sim may have crashed or quit responding Domain: com.apple.SimLaunchHostService.RequestError Code: 4 -- Analytics Event: com.apple.dt.IDERunOperationWorkerFinished : { "device_model" = "iPhone15,2"; "device_osBuild" = "16.2 (20C52)"; "device_platform" = "com.apple.platform.iphonesimulator"; "launchSession_schemeCommand" = Run; "launchSession_state" = 1; "launchSession_targetArch" = "x86_64"; "operation_duration_ms" = 8341; "operation_errorCode" = 60; "operation_errorDomain" = NSPOSIXErrorDomain; "operation_errorWorker" = "_IDEInstalliPhoneSimulatorWorker"; "operation_name" = IDERunOperationWorkerGroup; "param_consoleMode" = 0; "param_debugger_attachToExtensions" = 0; "param_debugger_attachToXPC" = 1; "param_debugger_type" = 3; "param_destination_isProxy" = 0; "param_destination_platform" = "com.apple.platform.iphonesimulator"; "param_diag_MainThreadChecker_stopOnIssue" = 0; "param_diag_MallocStackLogging_enableDuringAttach" = 0; "param_diag_MallocStackLogging_enableForXPC" = 1; "param_diag_allowLocationSimulation" = 1; "param_diag_checker_tpc_enable" = 1; "param_diag_gpu_frameCapture_enable" = 0; "param_diag_gpu_shaderValidation_enable" = 0; "param_diag_gpu_validation_enable" = 0; "param_diag_memoryGraphOnResourceException" = 0; "param_diag_queueDebugging_enable" = 1; "param_diag_runtimeProfile_generate" = 0; "param_diag_sanitizer_asan_enable" = 0; "param_diag_sanitizer_tsan_enable" = 0; "param_diag_sanitizer_tsan_stopOnIssue" = 0; "param_diag_sanitizer_ubsan_stopOnIssue" = 0; "param_diag_showNonLocalizedStrings" = 0; "param_diag_viewDebugging_enabled" = 1; "param_diag_viewDebugging_insertDylibOnLaunch" = 1; "param_install_style" = 0; "param_launcher_UID" = 2; "param_launcher_allowDeviceSensorReplayData" = 0; "param_launcher_kind" = 0; "param_launcher_style" = 0; "param_launcher_substyle" = 0; "param_runnable_appExtensionHostRunMode" = 0; "param_runnable_productType" = "com.apple.product-type.application"; "param_runnable_type" = 2; "param_testing_launchedForTesting" = 0; "param_testing_suppressSimulatorApp" = 0; "param_testing_usingCLI" = 0; "sdk_canonicalName" = "iphonesimulator16.2"; "sdk_osVersion" = "16.2"; "sdk_variant" = iphonesimulator; } -- System Information macOS Version 12.7.1 (Build 21G920) Xcode 14.2 (21534) (Build 14C18) Timestamp: 2025-06-29T08:16:35+02:00 I filed a bug report: FB18475006
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Jun ’25
Can some of those simulator files be safely deleted ?
When looking ay space used by system, I found that AssetsV2 (in System/Library) account for 270 GB. In this folder, 3 account for 260 GB and are apparently related to Xcode simulators: Content is a bit cryptic. Does it relate to some specific apps I compiled and ran on simulator ? Or is it related to older versions of Xcode I keep on the Mac ? How to know what each forlder relates to ? Is it safe to remove ?
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169
Jun ’25
In Xcode 26 ß (iOS 26 simulator) UIBarButtonItem content disappear when tapped
Just testing an existing app with Xcode 26. I notice that content of UIBarButtonItem (either text or image) disappears when tapped (and reappear on release). Those are custom, bordered buttons. Attribute inspector: Buttons in Xcode: When selected in Xcode, we see a rectangle inside the rounder rect of iOS 26 In simulator: When tapped in simulator: I have edited code from backButton.setTitleTextAttributes([ .font : boldFont, .foregroundColor : UIColor.systemBlue, ], for: .normal) to backButton.setTitleTextAttributes([ .font : boldFont, .foregroundColor : UIColor.systemBlue, ], for: [.normal, .focused, .selected, .highlighted]) to no avail. What am I missing ?
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398
Aug ’25
Swift 6 conversion for IBOutlet
I'm struggling to convert Swift 5 to Swift 6. As advised in doc, I first turned strict concurrency ON. I got no error. Then, selected swift6… and problems pop up. I have a UIViewController with IBOutlets: eg a TextField. computed var eg duree func using UNNotification: func userNotificationCenter I get the following error in the declaration line of the func userNotificationCenter: Main actor-isolated instance method 'userNotificationCenter(_:didReceive:withCompletionHandler:)' cannot be used to satisfy nonisolated requirement from protocol 'UNUserNotificationCenterDelegate' So, I declared the func as non isolated. This func calls another func func2, which I had also to declare non isolated. Then I get error on the computed var used in func2 Main actor-isolated property 'duree' can not be referenced from a nonisolated context So I declared duree as nonsilated(unsafe). Now comes the tricky part. The computed var references the IBOutlet dureeField if dureeField.text == "X" leading to the error Main actor-isolated property 'dureeField' can not be referenced from a nonisolated context So I finally declared the class as mainActor and the textField as nonisolated @IBOutlet nonisolated(unsafe) weak var dureeField : UITextField! That silences the error (but declaring unsafe means I get no extra robustness with swift6) just to create a new one when calling dureeField.text: Main actor-isolated property 'text' can not be referenced from a nonisolated context Question: how to address properties inside IBOutlets ? I do not see how to declare them non isolated and having to do it on each property of each IBOutlet would be impracticable. The following did work, but will make code very verbose: if MainActor.assumeIsolated({dureeField.text == "X"}) { So I must be missing something.
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711
Aug ’25
Crash in Swift 6 when using UNUserNotification
After porting code to Swift 6 (Xcode 16.4), I get a consistent crash (on simulator) when using UNUserNotificationServiceConnection It seems (searching on the web) that others have met the same issue. Is it a known Swift6 bug ? Or am I misusing UNUserNotification ? I do not have the crash when compiling on Xcode 26 ß5, which hints at an issue in Xcode 16.4. Crash log: Thread 10 Queue : com.apple.usernotifications.UNUserNotificationServiceConnection.call-out (serial) As far as I can tell, it seems error is when calling nonisolated func userNotificationCenter(_ center: UNUserNotificationCenter, willPresent notification: UNNotification, withCompletionHandler completionHandler: @escaping (UNNotificationPresentationOptions) -> Void) I had to declare non isolated to solve a compiler error. Main actor-isolated instance method 'userNotificationCenter(_:didReceive:withCompletionHandler:)' cannot be used to satisfy nonisolated requirement from protocol 'UNUserNotificationCenterDelegate' I was advised to: Add 'nonisolated' to 'userNotificationCenter(_:didReceive:withCompletionHandler:)' to make this instance method not isolated to the actor I filed a bug report: Aug 10, 2025 at 2:43 PM – FB19519575
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Sep ’25
Where to find sample code for SB2420 compliance and questions
I'm struggling to implement required code for SB2420 compliance. I try to learn on a very simple use case. the app is UIKit Build in Xcode 26.2 it displays a single Hello view with a button that will simply show a "Good day" label. I assume the app will be rated 4+. I tried the following code, using available information in Xcode (limited): import UIKit import DeclaredAgeRange // other import needed ? class ViewController: UIViewController { @IBOutlet weak var welcomeLabel: UILabel! // initially hidden override func viewDidLoad() { super.viewDidLoad() // Do any additional setup after loading the view. } func testAgeRange() -> Bool { if !isEligibleForAgeFeatures { // Not found. Which import needed ? return true // Not called from Texas } // Following code from Xcode doc… do { let response = try await AgeRangeService.shared.requestAgeRange(ageGates: 13, 15, 18) // Compiler Error: Missing argument for parameter 'in' in call // Can I add the 4 gate ? guard let lowerBound = response.lowerBound else { // Allow access to under 13 features. return false } var ok = false if lowerBound >= 18 { // Not needed ? // Allow access to 18+ features. ok = true } else if lowerBound >= 15 { // Not needed ? // Allow access to 15+ features. ok = true } else if lowerBound >= 13 { // Not needed ? // Require parental consent ? // Allow access to 13+ features. ok = true // if consent OK } else { // Require parental consent ? // Show age-appropriate content ok = true // if consent OK } return ok // Authorized for all 4+ } catch AgeRangeService.Error.notAvailable { // No age range provided. return false } } func executeStart() { welcomeLabel.isHidden = false } @IBAction func start(_ sender: UIButton) { if #available(iOS 26.0, *) { if testAgeRange() { // Need to test for parental control here ? } else { // Alert and exit the app ? } } else { // do nothing ? Can we run the app ? } executeStart() } } The logic would be: before allowing action with the start button, check is it IOS 26+ so that we can call API if so, is verification needed (Texas SB2420) if not, we can proceed if required, test age range As app is 4+, all ranges should be OK But need to test parental control Now, many pending questions in code: line 14: get an error: Cannot find 'isEligibleForAgeFeatures' in scope line 19: I used the documentation sample for AgeRangeService, but get a Compiler Error: Missing argument for parameter 'in' in call line 35: how to implement parental control ? In addition, in the metadata of the app, should I declare that parental control ? Age verification? Mechanism for confirming that a person's age meets the age requirement for accessing content or services As there is no restriction on age, is it required ? Any help welcomed as well as link to a comprehensive tutorial.
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300
Dec ’25
Do we still need to comply with SB2420 on Jan 1st for distributing apps in Texas ?
According to this news, we don't need anymore (at least temporarily): https://www.macrumors.com/2025/12/23/texas-app-store-law-blocked/ A Texas federal judge today blocked an App Store age verification law that was set to go into effect on January 1, 2026, which means Apple may not have to support the changes after all. Hope we shall get very rapidly more information from Apple.
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169
Dec ’25