Delve into the world of built-in app and system services available to developers. Discuss leveraging these services to enhance your app's functionality and user experience.

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Unable to distribute watchOS only build
I don't see upload option for the App Store connect, can only export .ipa. Also having issues with Transporter, pasting error message here. Could not create a temporary .itmsp package for the app "Redacted.ipa". Unable to determine app platform for 'Undefined' software type. Is anyone else facing the same issue? I am using Xcode 15.
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1.7k
Feb ’25
iOS 18.x PDFKit Page.string and Page.attributedString return some text way out of oder
Reading text out of PDFs with PDFKit results in some text being returned way out of order when using .string or .attributedString functions. Way out of order means not just wrong sorting of words on a line or wrongly showing up on the next line (as has happened with PDFKit on older iOS releases, e.g. 17.x), but some text (one or more words) may show up near the end of a page of text, while it should show near the beginning. As Page.characterBounds(at:) is buggy in iOS 18.x returns wrong bounds, devs cannot correct such faulty PDFKit behaviour programmatically. I believe it is on Apple to fix this iOS 18 bug asap. Thank you for giving it priority as this is killing apps that need PDFKit to get and parse text data out of PDFs. I have filed Feedback FB16264926.
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712
Jan ’25
iOS26 beta: AppClips are not working properly
Hi, As a company, we have several apps in the AppStore that contain AppClips. With the latest iOS18 it works without any problems. With all iOS26 betas so far, however, there is always the problem “ASDErrorDomain- Error 507” and the AppClip cannot be opened. You can easily test this by scanning the following QR code with the system camera: You only ever get this error instead of the option to open the AppClip. As the iOS26 beta phase is already at an advanced stage, we are naturally concerned as to whether the problem will be solved.
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639
Oct ’25
Question about App Clip Update Behavior
Hello, I would like to understand the update behavior for App Clips. Let's consider a scenario where a user has an App Clip on their device from a previous interaction. If I, as the developer, then publish a new version of the App Clip to the App Store, what is the expected behavior? My main questions are: Will the App Clip be automatically updated in the background? Or, is user action required to get the new version, for example, by deleting the old one and re-launching it from a Smart App Banner or QR code? Any information on this process would be greatly appreciated. Thank you.
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189
Oct ’25
macOS 15.1 MFMailComposeViewController.canSendMail() returns false always
In my Catalyst app I use func setupMailComposer() { // Check if the device can send email guard MFMailComposeViewController.canSendMail() else { print("Mail services are not available") showMailErrorAlert() return } // Create and configure the mail composer let mailComposeVC = MFMailComposeViewController() mailComposeVC.mailComposeDelegate = self // Set the email details mailComposeVC.setToRecipients(["example@example.com"]) mailComposeVC.setSubject("Subject for your email") mailComposeVC.setMessageBody("This is the body of the email.", isHTML: false) // Attach a file (optional) if let filePath = Bundle.main.path(forResource: "example", ofType: "pdf"), let fileData = try? Data(contentsOf: URL(fileURLWithPath: filePath)) { mailComposeVC.addAttachmentData(fileData, mimeType: "application/pdf", fileName: "example.pdf") } // Present the mail composer self.present(mailComposeVC, animated: true, completion: nil) } Since I have updated to macOS 15.1 the canSendMail() function returns false although I have configured Apple Mail (like before in 15.0 where it worked flawlessly).
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479
Apr ’25
iOS 26 fails to automatically switch to [system settings - personal hotspot ] directly from application ]
The API we used: NSURL *url = [NSURL URLWithString:@"App-Prefs:INTERNET_TETHERING"]; The link provided by Apple engineer: https://developer.apple.com/forums/thread/761314 I did not find any URL in the link that leads to the secondary menu of system settings. Does this suggest that iOS 26 does not support this functionality? Moreover, is it possible that versions of iOS 18 and earlier may also not support this behavior in the future?
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3w
Callkit/Call-Blocking Error
I have an app developed by using the Callkit/Call-Blocking and received feedback from individual users, when using [cxcalldirectorymanager reloadextensionwithidentifier] to write call blocking data, it returned error code 11 with the following contents: errorCode: 11 errorDomain: com.apple.callkit.database.sqlite errorDescription: sqlite3_step for query 'DELETE FROM PhoneNumberBlockingEntry WHERE extension_id =?' returned 11 (11) errorMessage 'database disk image is malformed' I want to know the reasons for this error and how to solve it,Thanks!
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115
Nov ’25
Xcode 16.2 App Crashes Due to Missing NSMotionUsageDescription Key in Info.plist
There is a crash while running the project in Xcode 16.2. The project has been using CMPedometer and CoreMotion since 2020. I wonder: I did not have the NSMotionUsageDescription key added, why is it mandatory to add this key now? “This app has crashed because it attempted to access privacy-sensitive data without a usage description. The app's Info.plist must contain an NSMotionUsageDescription key with a string value explaining to the user how the app uses this data.”
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583
Apr ’25
Crash on iOS: UIKitCore -[UIApplication _run] with CFRunLoopRun
Hello everyone, I’m experiencing a crash in my iOS application that’s occurring predominantly on devices running iOS 16.6.0. The crash seems to happen on the main thread during a UI operation, specifically within the UIKitCore framework. Crash Log Summary Thread 0 Crashed: 0 libsystem_kernel.dylib 0xca4 mach_msg2_trap + 8 1 libsystem_kernel.dylib 0x13b74 mach_msg2_internal + 80 2 libsystem_kernel.dylib 0x13e4c mach_msg_overwrite + 540 3 libsystem_kernel.dylib 0x11e8 mach_msg + 24 4 CoreFoundation 0x79024 __CFRunLoopServiceMachPort + 160 5 CoreFoundation 0x7a250 __CFRunLoopRun + 1208 6 CoreFoundation 0x7f3ec CFRunLoopRunSpecific + 612 7 GraphicsServices 0x135c GSEventRunModal + 164 8 UIKitCore 0x39cf58 -[UIApplication _run] + 888 9 UIKitCore 0x39cbbc UIApplicationMain + 340 10 MyApp 0x24050 main + 51 (AppDelegate.swift:51) 11 ??? 0x1d3594dec (Missing) I’ve attached the full crash crashlog.txt and would appreciate any insights or recommendations on how to resolve this issue.
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1.3k
Apr ’25
iOS Universal Link opens app and then opens browser (Flutter + Universal Links) — only when using paths/params
Hi everyone, I’ve been stuck on an issue with iOS Universal Links for about a week and could really use some help. The problem When tapping a Universal Link on iOS, my Flutter app opens correctly (desired behavior) — but immediately afterward, Safari opens the same link in the browser. So both the app and the browser open. This only happens on iOS. On Android everything works as expected. What works If the link is simply the domain, like: https://mydomain.com …then the app opens without triggering the browser afterward. This is the correct behavior. What doesn’t work If the link includes a path or parameters, like: https://mydomain.com/path https://mydomain.com/path?param=value …then the app opens, and then the browser opens immediately after. What I’ve tried Verified my AASA file using Branch’s validator: https://branch.io/resources/aasa-validator/ → The AASA file is valid. Universal Links do open the correct screen inside the app — the issue is the unwanted second step (Safari opening). Behavior is consistent across different iOS devices. Extra details Using Flutter. Universal Links set up with the standard configuration (associatedDomains, AASA hosted at /.well-known/apple-app-site-association, etc.). Question Has anyone encountered this issue where Universal Links with paths/params open the app and then open Safari? What could cause iOS to trigger the browser fallback even when the AASA file is valid and the app handles the link correctly? Any insights, debugging tips, or known edge cases would be incredibly appreciated!
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100
Nov ’25
Setting the "Open With ..." application for multiple files
On macOS, one can set the "Open With ..." application in the information panel of a file without changing the default for this file type. However, doing this for a number of files is very tedious. A simple case is to change all .txt files in a directory to a special editor, but leave the system wide default (usually TextEdit). I have tried AppleScript, command line tools as well as a minimal GUI app (using LSSetItemAttribute), but all fail because of a lack of permission. Is there any way to achieve this?
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103
Oct ’25
Strange behavior and log entries for Mac Catalyst Action
I have a text based action for iPhone and Mac Catalyst I am developing in Xcode 14.3.1 on macOS 13.4.1. I have the container app, an action and an AppGroup defined. I have confirmed that I can read the necessary shared defaults when the action launches. At this point the UI for the action is a simple textview in which I hope to display a modified version of the text passed to the action in the NSExtensionItems. I am not using a simulator. I am running the action directly using Xcode. What is happening is that the ActionViewController viewDidLoad runs but no visible window opens. In the console I see this as the action launches: 2023-07-05 18:27:23.692277-0700 XYZ[4634:279295] [ViewBridge] ViewBridge attempted to look up a hosted window with identifier 8E816BD5-67D3-402D-ADEB-AC59EDFA1F3B, but it was never registered. 2023-07-05 18:27:23.692408-0700 XYZ[4634:279295] [WindowHosting] UIScene property of UINSSceneViewController was accessed before it was set. .... The last line above is repeated 12 times.... Any helpful ideas would be deeply appreciated! Steve
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1.4k
Jan ’25
FamilyActivitySelection tokens are invalid for other members in family sharing network
I'm currently working with the FamilyControls API and testing my app on two different devices. Both apps are in the same family-sharing network with one phone being the owner of the network (I'll call this A) and the other one being an adult in the network(I'll call this B). When device A picks apps using the FamilyActivityPicker, it shares that selection with device B (via encoding, sending over network, and decoding on device B). However, interacting with the token (displaying it, using it in shield) throws an error saying the token is null. From the documentation, I thought every token would be the same across all devices in the family sharing network. So my question: How do I send the FamilyActivitySelection from A to B and have the tokens still be functional? Does this functionality only work if A is a "parent" and B is a "child" in the family sharing network? Also, side note: If I reverse the process and send the tokens from B to A. Interacting with the token works exactly as expected. For some reason, it's only going from A to B where it doesn't work.
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503
Mar ’25
iOS 17 AppIntent and requesting confirmation for widgets
I have a home widget with buttons (new in iOS 17). In order to prevent taking action if the user taps on the widget buttons accidentally, I want to ask the user for confirmation. It appeared that requestConfirmation be exactly what I needed, but no confirmation view shows up when I invoke this method in the perform function. I have tried the following: try await requestConfirmation(result: .result(dialog: "Are you sure you want to do this?") { Image(.mdlsWhite) }) and this alternative: let confirmed: Bool = try await $name.requestConfirmation(for: self.name, dialog: IntentDialog(stringLiteral: msg)) Neither option work. I am starting to think that the requestConfirmation is not to be used with Home Widgets. Is there a better way to handle confirmations for buttons included in a Home Widget?
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1.4k
Feb ’25
How to test Declared Age Range functionality
How can experimentation and testing calling the AgeRangeService.shared.requestAgeRange() functionality be recreated easily? The very first time I ran this the OS popped up a dialog, however it won't do so again, even after the app is deleted and the device re-started. If one navigates to Settings/User/Personal Information/Age Range for Apps/Apps that have requested your age range appear here. Then the names of apps appear here even after the app has been deleted. Therefore how can it be removed from this section? Erasing and resetting the phone will presumably reset things back to a state such that the dialog can be presented again. But doing that and having to wait for that to complete each development or test run is impractical. Is there an alternative?
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229
Oct ’25
Label with ApplicationToken cannot be styled?
Hi, I'm trying to make use of the Device Activity Labels where you supply an ApplicationToken. I can successfully get it to show the icon + title of the Application (twitter in my case) but I cannot get the styling to work. // Works .labelStyle(.iconOnly) .labelStyle(.titleOnly) .border(...) ![]("https://developer.apple.com/forums/content/attachment/9660b578-a36f-4d5a-ae18-653a207aa5ab" "title=Screenshot 2023-03-12 at 12.57.34 PM.png;width=1218;height=844") // Does NOT work .font(.largeTitle) .foregroundColor(.blue) I have checked the same style (or just modifiers) against a standard Label and they actually do work in the code below. // This is an application token. Some style not applied. Label(targetApp) .labelStyle(MyStyle()) // Showing the same style using a simple label. All styles correctly applied. Label("Twitter", systemImage: "video.square.fill") .labelStyle(MyStyle()) Is changing the font + color of the title for this Label(_ applicationToken:) supported?
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2.5k
Mar ’25
How to manage child device's apps through an app on parent's phone using Screen Time Controls?
When we request auth from the AuthorizationCenter, it seems that we're only really able to allow users to control the apps on the parent's phone. Is there a way to allow us to let parents manage apps on the kid's device directly through our parent app? For context, we have 2 different apps, one for the parent and one for the child. The child is able to purchase screen time and the parent can redeem them (activate those minutes) from their end.
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266
Mar ’25
Does Contact Provider supports Localize when ask Permission
When I call https://developer.apple.com/documentation/contactprovider/contactprovidermanager/enable() to request to use Contact Provider, I received a dialog with message like this "App Name would like to add its contacts as its own list. Contacts added this way can be removed from settings". I would like to support this message in Japanese or other languages. Is it possible?
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98
Nov ’25
Voip Notifaction in Background
My app uses CallKit and PushKit for real-time voice and video calls. I want to configure VoIP push notifications so incoming calls can wake the app, even when it’s in the background or terminated. Right now, I only see the normal Push Notifications option in my App ID settings and no VoIP Services section.
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192
Nov ’25