Nothing ruins the vibe of a clean file like a yellow warning banner, especially for something that was working perfectly fine yesterday. The "problem" isn't that your code is broken; it’s just that Apple is getting stricter about text encodings in the latest OS versions. They want you to explicitly state how the file should be read (e.g., UTF-8) rather than letting the system guess. On line 30, you just need to add the encoding parameter. For 99% of text files, .utf8 is what you want. Change this: let contents = try String(contentsOf: fileURL) To this: let contents = try String(contentsOf: fileURL, encoding: .utf8) Why is this happening? The Deprecation: As of macOS 15 (and iOS 18), the version of String(contentsOf:) that doesn't require an encoding is officially deprecated. The Logic: Without an explicit encoding, the system tries to "guess" if the file is UTF-8, Windows-1252, etc. If it guesses wrong, you get weird symbols or a crash. By forcing you to add , encoding: .utf8, Apple ensures your code is more predictable and stable. Once you add that one extra argument, that warning should vanish instantly!

By analysis the log, seems the following 3 calls has been ended by system callkit (Not mainly trigger the end call): @apple Do you have similar report that the iOS CallKit End the call withtour user action? Device info: iPhone18,1（iPhone 16 Pro） iOS 26.2 RCAppMobile/25.4.30.995 CTRadioAccessTechnologyNR（5G NR）

Original discussion pre iOS 26 Our app uses Auth0 with HTTPS callback, we've found the issue where AASA file is not ready immediately when app is initially launched, which is the exact issue from the above link. The issue seems mostly fixed on later versions on iOS 18, however, we are seeing some indications of a regression on iOS 26. Here's some measurement over the last week. | Platform | iOS 18 | iOS 26 | |---------------|----------|--------| | Adoption rate | 55% | 45% | | Issue seen | 1 | 5 | | Recover? | Yes | No | This only 1 iOS 18 instance was able to recover after 1 second after the first try, however, all iOS 26 instances were not able to recover in couple tens of seconds and less than 1 minute, the user eventually gave up. Is there a way to force app to update AASA file? Are there some iOS setting (like using a VPN) that could potentially downgrade the AASA fetch? Related Auth0 discussion: https://community.auth0.com/t/ios-application-not- recognizing-auth0-associated-domain/134847/27

Does Apple use a time series database to store sensorkit data? Would it make sense to use something like InfluxDB?

I've looked around quite a bit at the EventKit documentation and done all the searching I could think of, as well as examining the EKCalendar and EKEventStore types. Trying to find out how to view, modify, and create groups of reminders lists.

Hi everyone! I’m building Delta — an app designed to rethink time, because time is literally our most valuable currency. So the core mechanic involves earning time in useful apps and then spending it on apps that are a distraction. I already have a prototype that’s being actively tested in a closed beta, but I’ve started noticing that more and more testers are reporting the same bug. “Time is being counted even when I'm not in the app I marked as useful.” I suspect that Screen Time is also tracking background time, although this behavior isn't correct for my app. Does anyone know how to track specifically those moments when an app marked as useful and used for “time-earning” is in the foreground? Additionally, I hit a wall with Screen Time and had to accept that I can’t force a user away from another app if they’re active there, nor redirect them to my app to trigger the lock screen. Because of this, I had to resort to a penalty system, which is equal to the time the user spent additionally after their time ran out. And here, I run into the same problem I described at the beginning of the post. I can’t track the background status of another app, even though I’m trying really hard... Can anyone suggest any ways I can get out of this situation, or should I keep looking for a solution, or shift toward explaining this to the user?.. (However, I’m holding out until the very end before giving up on finding a solution)

Hi team: I recently update to Xcode 26.4, and I encountered crash when running to < iOS 26.4 both for physical device and Simulator with this log: dyld[1257]: Symbol not found: _$s9MetricKit10mxSignpost_3dso3log4name10signpostID__ySo03os_H7_type_ta_SVSo03OS_j1_F0Cs12StaticStringV0J0010OSSignpostI0VALSays7CVarArg_pGtF Referenced from: <164CCEB0-E1F8-3CE2-A934-2096C19C0A9A> /private/var/containers/Bundle/Application/EA709A68-F76F-4D97-85C6-B71D61D68389/xxx.app/xxx.debug.dylib Expected in: <9E5EC9BB-5828-329C-A2BC-038B67060298> /System/Library/Frameworks/MetricKit.framework/MetricKit Symbol not found: _$s9MetricKit10mxSignpost_3dso3log4name10signpostID__ySo03os_H7_type_ta_SVSo03OS_j1_F0Cs12StaticStringV0J0010OSSignpostI0VALSays7CVarArg_pGtF Referenced from: <164CCEB0-E1F8-3CE2-A934-2096C19C0A9A>x /private/var/containers/Bundle/Application/EA709A68-F76F-4D97-85C6-B71D61D68389/xxx.app/xxx.debug.dylib Expected in: <9E5EC9BB-5828-329C-A2BC-038B67060298> /System/Library/Frameworks/MetricKit.framework/MetricKit dyld config: DYLD_LIBRARY_PATH=/usr/lib/system/introspection DYLD_INSERT_LIBRARIES=/usr/lib/libLogRedirect.dylib:/usr/lib/libBacktraceRecording.dylib:/usr/lib/libMainThreadChecker.dylib:/usr/lib/libRPAC.dylib:/usr/lib/libViewDebuggerSupport.dylib but iOS 26.4 works well. Env: Xcode: 26.4 Simulator/Physical Device: < 26.4 macOS: 26.3 Thanks for giving any help.

HTTP status code: 401. Invalid credentials. Username or password is incorrect. Use the app-specific password generated at appleid.apple.com. Ensure that all authentication arguments are correct. I double checked every thing but still getting same error

I've been stuck on Guideline 2.3 for two weeks now and I'm running out of ideas. My app is iPhone-only (UIDeviceFamily = [1]) and has been on the App Store since January. Version 2.1.9 passed review fine. The only change in 2.1.10 is adding two DeviceActivity extensions — a DeviceActivityMonitor and a DeviceActivityReport — for screen time-based stress detection. Every build since then gets rejected with the same message: "The UIRequiredDeviceCapabilities key in the Info.plist is set up in such a way that the app will not install on the device used in review." Review devices: iPhone 14 Pro, iPhone 17 Pro Max, iPad Air M3. Here's what I've tried across 13+ submissions: UIRequiredDeviceCapabilities as ["arm64"] (array) — rejected Empty array [] — rejected Removed the key entirely — upload validation fails, Xcode re-injects arm64 anyway Post-build script to force ["arm64"] — rejected Dictionary format {"arm64": true} — rejected Added com.apple.developer.family-controls to extension entitlements — rejected Enabled Family Controls (Distribution) on extension bundle IDs — rejected Fixed CFBundleVersion mismatch between host app and extensions — rejected Set TARGETED_DEVICE_FAMILY=1 on all targets including extensions — rejected Tried GENERATE_INFOPLIST_FILE=YES with minimal plists — rejected Tried ExtensionKit type for the report extension — rejected In the exported IPA, every target has UIRequiredDeviceCapabilities = ["arm64"] and UIDeviceFamily = [1]. The entitlements, provisioning profiles, and code signing all look correct. arm64 is supported on every review device they listed. The previous version (2.1.9) without DeviceActivity extensions passes review with the exact same UIRequiredDeviceCapabilities and signing configuration. Has anyone shipped an app with DeviceActivityMonitor + DeviceActivityReport extensions successfully? Is there something specific about these extension types that affects device capability validation? Or is there a known issue with the review system and FamilyControls extensions? I've replied to the review team multiple times asking which specific capability is causing the failure, but the response is always the same generic template. Any guidance would be really appreciated — I'm completely blocked on shipping this update.

Hello, I released a new build for my app but it fails to run on iOS 12.5.8 (tested on iPad Air, iPhone 6, iPhone 5s). The launch storybard is shown, then the app stops abruptly. There is no crash log. It runs fine on iOS 13 or higher. Xcode 26.3 was showing a call stack (something with UIView) that did not include any app code. Now with Xcode 26.4 (and its new command line tools) there is an info popup with a debug metadata dump. However, I don’t intend to focus on Xcode here because it officially does not support iOS 12. It’s ok if I cannot debug, I just want the app to run on the device like the previous build did. Since there is no crash log, and the console is showing a bootstrap error, I believe my app code has not been executed and is therefore not at fault. Build 674 released on 23-Mar-2026: worked fine on iOS 12, built with Xcode 26.3 Build 675 released on 29-Mar-2026: Bootstrap error as described, with both Xcode 26.3 and 26.4 Deployment target = 12.4 Tried Instruments but it fails as soon as I hit record. In the console I found BKSProcessErrorDomain code 1. Here on the forum I found a post where the cause was no internet access but my device does have internet access. I made only very little code changes to my app between 674 and 675, no storyboard updates. I get the impression the loader does not even begin to execute my code. At this point I wonder if: some certificate has expired (see release dates above), or if something is incompatible in my main storyboard (though I did not change anything there), or the device ran out of memory (1 GB) Note: The app has 4 targets: main app target framework AU app extension intents app extension Thanks, Sven PS: Misclicked subtopic which should have been General (sorry). Here’s the redacted console excerpt: standard 22:21:13.187990+0200 SpringBoard Evaluate: making new window key: <SBMainSwitcherWindow: 0x159e5f640>, for reason: push standard 22:21:13.188303+0200 SpringBoard Removed: <FBUIApplicationSceneDeactivationAssertion: 0x283c9dfe0; reason: systemAnimation; all scene levels; hasPredicate: NO> standard 22:21:13.198299+0200 assertiond Submitting new job for "com.example.app" on behalf of <BKProcess: 0x141d15d50; SpringBoard; com.apple.springboard; pid: 48; agency: SystemShell; visibility: foreground; task: running> standard 22:21:13.198867+0200 SpringBoard Bootstrapping com.example.app with intent foreground-interactive standard 22:21:13.201136+0200 assertiond Submitted job with label: UIKitApplication:com.example.app[0x1d9f][58] standard 22:21:13.201244+0200 SpringBoard Icon touch canceled (tap gesture may still succeed): <private> fehler 22:21:13.201329+0200 SpringBoard [com.example.app] Bootstrap failed with error: <NSError: 0x283e4cd80; domain: BKSProcessErrorDomain; code: 1 (bootstrap-failed); reason: "Failed to start job"> fehler 22:21:13.201421+0200 SpringBoard Bootstrapping failed for <FBApplicationProcess: 0x15d13b3e0; com.example.app; pid: -1> with error: Error Domain=BKSProcessErrorDomain Code=1 "Unable to bootstrap process with bundleID com.example.app" UserInfo={NSLocalizedDescription=Unable to bootstrap process with bundleID com.example.app, BKSProcessExitReason=0, NSLocalizedFailureReason=Failed to start job, NSUnderlyingError=0x283e4c5d0 {Error Domain=NSPOSIXErrorDomain Code=3 "No such process" UserInfo={BKLaunchdOperation=launch_get_running_pid_4SB, NSLocalizedDescription=Unable to get pid for label UIKitApplication:com.example.app[0x1d9f][58], BKLaunchdJobLabel=UIKitApplication:com.example.app[0x1d9f][58], NSLocalizedFailureReason=No such process}}, BKSProcessJobLabel=UIKitApplication:com.example.app[0x1d9f][58], BSErrorCodeDescription=bootstrap-failed} standard 22:21:13.201507+0200 SpringBoard Adding: <FBApplicationProcess: 0x15d13b3e0; com.example.app; pid: -1> standard 22:21:13.201606+0200 SpringBoard <FBApplicationProcess: 0x15d13b3e0; com.example.app; pid: -1> exited. standard 22:21:13.202002+0200 assertiond Unable to get pid for 'UIKitApplication:com.example.app[0x1d9f][58]': No such process (3) fehler 22:21:13.202145+0200 assertiond Failed to start job with error <NSError: 0x141e1aba0; domain: NSPOSIXErrorDomain; code: 3; reason: "No such process"> { description = "Unable to get pid for label UIKitApplication:com.example.app[0x1d9f][58]"; failureReason = "No such process"; userInfo = { BKLaunchdJobLabel = UIKitApplication:com.example.app[0x1d9f][58]; BKLaunchdOperation = launch_get_running_pid_4SB; } } standard 22:21:13.202238+0200 assertiond Deleted job with label: UIKitApplication:com.example.app[0x1d9f][58] standard 22:21:13.202804+0200 SpringBoard Removing: <FBApplicationProcess: 0x15d13b3e0; com.example.app; pid: -1> standard 22:21:13.221231+0200 SpringBoard Application process state changed for com.example.app: <SBApplicationProcessState: 0x28336f0a0; pid: -1; taskState: Not Running; visibility: Unknown> standard 22:21:13.221566+0200 SpringBoard Process exited: <FBApplicationProcess: 0x15d13b3e0; com.example.app; pid: -1> -> <FBApplicationProcessExitContext: 0x283e37b10; exitReason: (none); terminationReason: (none)> { stateAtExit = <FBProcessState: 0x28337c760; pid: -1; taskState: Unknown; visibility: Unknown>; }

I'm building an app that integrates with Reminders using EventKit, but I can't find a way to access two important structures from EventKit: The groups that contain reminder lists The sections inside each reminder list (available since iOS 17) Any help or guidance would be appreciated.

I'm trying to implement Unwanted SMS and Calls reporting in an app I'm doing in my idle time. If I place a UITextField or UITextView inside a ILClassificationUIExtensionViewController, every time I select on such control the extension crashes without any logs. The closet idea I have on why it crashes it has something to do with iOS requesting the dictation feature. I'm using the latest (beta 8 at the time) iOS 16.0 beta on my iPhone 13 pro. Attaching my code here if you want to try for yourself: github

Hello, I am starting work on adding AlarmKit to an existing project. During testing, I ran into an issue that if I hit Deny during the authorization request, I can't find any way to turn the alarm back on in settings. The only way I can get an authorization request again is by uninstalling the app and installing it again. I would like to be able to prompt my users where they can turn the Alarm back on if they accidentally hit Deny. Am I just not seeing the settings to change this somewhere?

Summary I'm using Background Assets to download Apple-hosted Asset Packs(downloadPolicy = onDemand). The first download cancellation succeeds, but on the second and subsequent downloads, progress.cancel() fails to work and the download completes to the end. Environment iOS 26.0 – 26.3 RC (all produce the same result) Xcode Version 26.2 (17C52) Using Apple-hosted Asset Packs Steps to Reproduce Start downloading an Asset Pack Call progress.cancel() during download → Succeeds Start downloading the same Asset Pack again Call progress.cancel() during download → Fails (download completes to the end) Observed Error Logs After 1st cancellation: A download with the ID "X-XXXXXXXX-XXX" failed: Error Domain=NSURLErrorDomain Code=-999 "cancelled" ↑ This is expected (cancellation succeeded) The fact that version 0 of the asset pack with the ID "X-XXXXXX-XXX" finished being downloaded couldn't be reported: Error Domain=NSCocoaErrorDomain Code=3851 "Property list invalid for format: 200 (property lists cannot contain objects of type 'CFError')" ↑ Problem: Unable to serialize CFError to plist 2nd cancellation attempt: The download with the ID "X-XXXXXX-XXX" couldn't be canceled: Error Domain=BAErrorDomain Code=113 "The requested download operation failed because the download object did not exist." ↑ The download object we're trying to cancel supposedly doesn't exist Implementation Code // Cancel implementation func cancel(tag: String) async { let statusUpdates = AssetPackManager.shared.statusUpdates(forAssetPackWithID: tag) for await statusUpdate in statusUpdates { if case .downloading(_, let progress) = statusUpdate, progress.isCancellable { progress.cancel() } } } Analysis It appears that when the first cancellation occurs, the system internally tries to save the cancellation state to a plist, but fails to serialize the CFError object. This seems to cause an inconsistent internal state, preventing the system from correctly recognizing the download object on subsequent downloads. Questions Is there a workaround? Is there a planned fix for a future iOS version?

Reference: FB21797091 / Related to thread 807695 Hello, I have already submitted a report regarding this issue via Feedback Assistant (FB21797091), but I would like to share the technical details here to seek further insights or potential workarounds. We are experiencing a technical regression where Universal Links and Shared Web Credentials fail to resolve for Internationalized Domain Names (IDN) specifically on iOS 16 and later. This issue appears to be identical to the one discussed in thread 807695 (https://developer.apple.com/forums/thread/807695). Technical Contrast: What works vs. What fails On the exact same app build and iOS 16+ devices, we observe a clear distinction: Standard ASCII Domain (onelink.me): Works perfectly. (Proves App ID and Entitlements are correct) Internal Development Domain (Standard ASCII): Works perfectly. (Proves our server-side AASA hosting and HTTPS configuration are correct) Japanese IDN Domain (xn--[punycode].com): Fails completely. (Status: "unspecified") Note: This IDN setup was last confirmed to work correctly on iOS 15 in April 2025. Currently, we are unable to install the app on iOS 15 devices for live comparison, but the regression starting from iOS 16 is consistent. This "Triple Proof" clearly isolates the issue: the failure is strictly tied to the swcd daemon's handling of IDN/Punycode domains. Validation & Diagnostics: Validation: Our Punycode domain passes all technical checks on the http://Branch.io AASA Validator (Valid HTTPS, valid JSON structure, and Content-Type: application/json). sysdiagnose: Running swcutil on affected iOS 16+ devices shows the status as "unspecified" for the IDN domain. Symptoms: Universal Links consistently open in Safari instead of the app, the Smart App Banner is not displayed, and Shared Web Credentials for AutoFill do not function. Request for Resolution: We request a fix for this regression in the swcd daemon. If this behavior is a specification for security reasons, please provide developers with a supported method or workaround to ensure IDN domains function correctly. We have sysdiagnose logs available for further investigation. Thank you.

When using DateFormatter with the Atlantic/Azores timezone, calling date(from: formattedString) for the date 2026-03-29 returns nil unexpectedly. codes： let dateFormatter = DateFormatter() dateFormatter.dateFormat = "yyyyMMdd" // 年月日格式 dateFormatter.timeZone = TimeZone(identifier: "Atlantic/Azores") dateFormatter.locale = Locale(identifier: "en_US_POSIX") var now = Date() now -= 60 * 60 * 13 let formattedString = dateFormatter.string(from: now) let dateWithTimeZone = dateFormatter.date(from: formattedString) print(formattedString) //20260329 print(dateWithTimeZone) // nil

The documentation for NSURL -URLByAppendingPathComponent: states: "Returns a new URL by appending a path component to the original URL." Path component is singular. But this "works" : NSURL *testURL = [applicationsDirectory URLByAppendingPathComponent:@"Evil/../../" isDirectory:YES]; So my questions are: One) Was it always this way? I can't recall if it was like this before the Foundation rewrite and I just never stumbled across? and Two) Is it intended behavior? The API seems to suggest that you append one path component on the url with this method. But I guess you can append as many as you want?

[FB22327481] We are observing a rare issue where alarms scheduled using AlarmKit occasionally fire exactly at 12:00 AM, even though the alarm was scheduled for a different time. This issue happens only for a very small number of users (for example, 1–2 users per several thousand per day), but multiple reports confirm that the alarm goes off exactly at midnight. We also found that other developers are experiencing the same issue: https://developer.apple.com/forums/thread/815714 Observed behavior For a small number of users: Alarm fires at exactly 00:00 (midnight) This happens even when the scheduled alarm time is something like 7:30 AM Happens rarely Hard to reproduce internally Appears to happen only on real devices in production Additional notes We are using AlarmKit fixed schedules (not relative) Dates passed to AlarmKit are correct at scheduling time We do not intentionally create midnight alarms Issue seems random Question Are there any known limitations or edge cases with AlarmKit fixed schedules that could cause alarms to fire at midnight? For example: Invalid date fallback? Schedule expiration fallback? Time zone changes? Background refresh timing? Maximum schedule window? Any guidance would be appreciated, as this is affecting real users but is difficult to reproduce.

On iOS 26.3.1, deviceactivityd produces zero log output and never wakes a DeviceActivityMonitor extension at the scheduled time, even when the schedule is successfully registered. The extension's intervalDidStart(for:) method is never called. Steps to Reproduce: Create an app with a DeviceActivityMonitor extension subclass Add the com.apple.developer.family-controls entitlement to both the main app and extension targets Add a shared App Group entitlement to both targets In the main app, call: let center = DeviceActivityCenter() center.stopMonitoring([.myActivity]) let schedule = DeviceActivitySchedule( intervalStart: DateComponents(hour: 17, minute: 30), intervalEnd: DateComponents(hour: 17, minute: 45), repeats: true ) try center.startMonitoring(.myActivity, during: schedule) Verify registration succeeds: DeviceActivityCenter().activities.contains(.myActivity) returns true Background the app completely and wait for the intervalStart time (5:30 PM in this example) Expected Result: intervalDidStart(for:) is called in the extension process at 5:30 PM. ManagedSettings shields are applied without any user interaction. Actual Result: intervalDidStart(for:) is never called. No extension process is launched. Filtering Console.app for deviceactivityd on the device returns 0 messages — the daemon produces no logs whatsoever despite an active registered schedule. Shields are never applied. Additional Evidence: Third-party apps using DeviceActivity (e.g. Prayer Lock) successfully apply shields at scheduled times on the same device and OS version, confirming the framework is not universally broken Filtering Console.app for the app's bundle ID at the trigger time shows the main app process applying shields via a UNCalendarNotificationTrigger fallback — but no extension process activity DeviceActivityCenter().activities correctly lists the registered activity before and after the trigger time, confirming the schedule registration API is functional Environment: iOS 26.3.1 Physical device (required for FamilyControls) Development-signed build with com.apple.developer.family-controls entitlement provisioned App Group shared between main app and extension targets

I’m running into a hardware reality. MEMS sensor thermal drift. If a user zeroes out the tilt indoors at 20°C and then takes the phone outside in the cold, the accelerometer baseline shifts just enough as the device cools to throw off the readings. I want to apply a simple thermal compensation curve to the CoreMotion data to keep the "zero" perfectly level regardless of the weather. However, ProcessInfo.thermalState only gives broad buckets (nominal, fair, etc.) which doesn't help me calculate a continuous offset for a phone cooling down degree by degree. Is there any public API, or even a proxy metric, that can give me a rough battery or internal temperature integer? I don’t need high resolution decimals. Just a general device temp to offset the hardware drift. Any undocumented tricks or proxy metrics anyone has used to handle this?