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How can I render a ScrollView so that its ScrollPosition is at the correct ID during layout?
Below you will find an example view of my problem. It has one button that, when pressed, will toggle between two scroll views using withAnimation, setting the scroll position onto the 2nd and 3rd items for either scroll view in onAppear. The intent is to have the background of items within each list transition smoothly from their position in one list, to their position in the other. However, this does not appear to be easily possible when setting the list position using an ID/ScrollPosition: Initializing a ScrollPosition with the correct ID and rendering the ScrollView with that appears to have no effect - the ScrollView will be drawn at the top of the scroll contents The only way I've found to render the ScrollView at an ID position is to scroll to that position in onAppear. However, it appears that when doing so, the matchedGeometryEffect interpolates the position of the elements as if the contentOffset.y of the ScrollView is briefly 0, resulting in a strange effect The desired animation can be seen if the
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I Need some clarifications about FoundationModels
Hello I’m experimenting with Apple’s on‑device language model via the FoundationModels framework in Xcode (using LanguageModelSession in my code). I’d like to confirm a few points: • Is the language model provided by FoundationModels designed and trained by Apple? Or is it based on an open‑source model? • Is this on‑device model available on iOS (and iPadOS), or is it limited to macOS? • When I write code in Xcode, is code completion powered by this same local model? If so, why isn’t the same model available in the left‑hand chat sidebar in Xcode (so that I can use it there instead of relying on ChatGPT)? • Can I grant this local model access to my personal data (photos, contacts, SMS, emails) so it can answer questions based on that information? If yes, what APIs, permission prompts, and privacy constraints apply? Thanks
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Xcode shows alert about unknown com.apple.quicklook.preview extension point when running on Apple Vision Pro Simulator
I have an iOS app with a QuickLook extension. I also added Apple Vision Pro in the target's General > Supported Destinations section. About one year ago, I was able to run the app on iPhone, iPad and Apple Vision Pro Simulators. Today I tried running it again on Apple Vision Pro with Xcode 26.0.1, but Xcode shows this error: Try again later. Appex bundle at ~/Library/Developer/CoreSimulator/Devices/F6B3CCA8-82FA-485F-A306-CF85FF589096/data/Library/Caches/com.apple.mobile.installd.staging/temp.PWLT59/extracted/problem.app/PlugIns/problemQuickLook.appex with id org.example.problem.problemQuickLook specifies a value (com.apple.quicklook.preview) for the NSExtensionPointIdentifier key in the NSExtension dictionary in its Info.plist that does not correspond to a known extension point. I tried again later a couple times, even after running Clean Build Folder Immediately, without any change. I can reproduce this with a fresh Xcode project to which I add a Quick Look Preview Extension an
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Reply to OnDemand not applying after profile switch
Thanks for those bug numbers. I took a quick look and they’re both still open [1] and with the right folks. Unfortunately there’s not much more I can share here. Based on info in the bug it seems that this problem reproduces with built-in VPN transports, like IKEv2. Does that gel with your experience? If so, that’s a strong indication that you’re not doing anything wrong here, and this is a bug that Apple will need to resolve. Share and Enjoy — Quinn “The Eskimo!” @ Developer Technical Support @ Apple let myEmail = eskimo + 1 + @ + apple.com [1] FB16432113 was marked as a dup of an internal bug, but that bug is still open.
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账号突然(3.2f),且突然无法进入开发者管理中心
您好,我们于2025年9月29日提交了应用程序评论。应用程序名称:招标快讯,我们收到一封电子邮件,说我们违反了Apple Developer 3.2(f)规定,并且突然无法进入开发者管理中心。虽然我们不知道具体原因,但我们已尽一切努力验证我们的帐户和应用程序的内容是否存在任何违规行为。我们的APP是一个名为招标快讯的软件。应用程序内容没有欺骗用户,应用程序没有伪造他人的产品。我们一直遵守苹果的相关法规,并致力于为用户提供有用的体育信息产品。我希望你能及时回复,并与我们合作解决这个问题,对产品和用户负责。谢谢!
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Reply to Get Serial Number From Device?
Thanks for the clear explanation of the specific problem you’re trying to solve. There’s been some recent developments in this space that should help you out here, namely the ManagedApp framework. With that your app can get credentials and configuration from the MDM system, allowing for the sort of coordination you’re looking to implement. Share and Enjoy — Quinn “The Eskimo!” @ Developer Technical Support @ Apple let myEmail = eskimo + 1 + @ + apple.com
Topic: App & System Services SubTopic: Core OS Tags:
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App Attest – DCAppAttestService.isSupported == false on some devices (~0.23%)
Hi Apple team, For our iPhone app (App Store build), a small subset of devices report DCAppAttestService.isSupported == false, preventing App Attest from being enabled. Approx. impact: 0.23% (352/153,791) iOS observed: Broadly 15.x–18.7 (also saw a few anomalous entries ios/26.0, likely client logging noise) Device models: Multiple generations (iPhone8–iPhone17); a few iPad7 entries present although the app targets iPhone Questions In iPhone main app context, what conditions can make isSupported return false on iOS 14+? Are there known device/iOS cases where temporary false can occur (SEP/TrustChain related)? Any recommended remediation (e.g., DFU restore)? Could you share logging guidance (Console.app subsystem/keywords) to investigate such cases? What fallback policy do you recommend when isSupported == false (e.g., SE-backed signature + DeviceCheck + risk rules), and any limitations? We can provide sysdiagnose/Console logs and more case details upon request. Thank you, —
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Reply to Crash in libquic.dylib when app is backgrounded and issues an HTTP/3 request on iOS 26
Thanks for the crash report. We collected the crash logs from users online. So, does that mean that you can’t reproduce this yourself? Because in your original post you had “Reproduction Steps”, which suggests that this is something you can reproduce. Based on thread 8, it looks like you’re using a third-party crash reporter. That makes things difficult, as I explain in Implementing Your Own Crash Reporter. My advice is that you remove this crash reporter from your app and try to get a Apple crash report for this crash. Still, it’s probably worthwhile filing a bug with the info that you currently have. Please do that, and then post your bug number here. Share and Enjoy — Quinn “The Eskimo!” @ Developer Technical Support @ Apple let myEmail = eskimo + 1 + @ + apple.com
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Reply to Potential Structural Swift Concurrency Issue: unsafeForcedSync called from Swift Concurrent context
Thanks for bringing this over to the Apple Developer Forums. On Swift Forums you wrote: This isn’t actually crashing the app Ah, confusing. There are multiple instances of code like this and some of them trap using fatalError(…) while others just log. [quote='802423021, interferon, /thread/802423, /profile/interferon'] Is there a way I can set a breakpoint to catch this where it happens? [/quote] Try this: (lldb) br set -s libswiftos.dylib -n os_log I’m not 100% sure it’ll hit this breakpoint but, if it does, the backtrace should help you understand how you got there. Share and Enjoy — Quinn “The Eskimo!” @ Developer Technical Support @ Apple let myEmail = eskimo + 1 + @ + apple.com
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Reply to URL Filter - blocked web page behaviour
I recommend that you report both of these via Feedback Assistant: Your first issue seems like a reasonable enhancement request. Your second issue seems like a bug. See Bug Reporting: How and Why? for general advice on how to file bugs effectively. Please post your bug numbers, just for the record. Share and Enjoy — Quinn “The Eskimo!” @ Developer Technical Support @ Apple let myEmail = eskimo + 1 + @ + apple.com
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Reply to What is the difference between applying "hardened runtime" to an executable and adding the `-o library` flag to codesign?
[quote='802437021, berd-lp, /thread/802437, /profile/berd-lp'] Is this flag something I should be explicitly setting? [/quote] Probably not. Library validation is implicitly enabled by the hardened runtime [1]. If you have that set, there’s no security benefit from enabling library validation explicitly. OTOH, it won’t cause any problems either. There are a few situations where having both flags is a benefit: If you run on systems prior to macOS 10.14, where the hardened runtime was introduced [2]. In macOS 10.15.x, x < 4, there was a Gatekeeper bug (r. 57278824) that you could workaround by explicitly enabling library validation. Share and Enjoy — Quinn “The Eskimo!” @ Developer Technical Support @ Apple let myEmail = eskimo + 1 + @ + apple.com [1] Unless you then opt out of it via the com.apple.security.cs.disable-library-validation. [2] I suspect that’s why various apps have it set. They added in back in the day and no one has got around to removing it.
Topic: Code Signing SubTopic: General Tags:
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Reply to When is Apple ever going to release an updated screensaver Xcode template?
I can’t answer why questions. See tip 3 in Quinn’s Top Ten DevForums Tips. My advice here is that you file an enhancement request for a better screen saver API, one based on app extension technology. While we’ve seen similar requests many times before, a fresh bug report will allow you to express your needs in your own terms, and allow Apple engineering to gauge the level of demand. Please post your bug number, just for the record. Share and Enjoy — Quinn “The Eskimo!” @ Developer Technical Support @ Apple let myEmail = eskimo + 1 + @ + apple.com
Topic: App & System Services SubTopic: General Tags:
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Reply to Terminal command to show team for signing identity
Something like this perhaps: % security find-certificate -c Apple Development: Quinn Quinn (7XFU7D52S4) -p > cert.pem % certtool d cert.pem … Subject Name : Other name : UT376R4K29 Common Name : Apple Development: Quinn Quinn (7XFU7D52S4) OrgUnit : SKMME9E2Y8 Org : Quinn Quinn Country : US … Unfortunately it relies on the name. If you’re worried about duplicates, you can pass -a, which results in a PEM with multiple certificates. certtool won’t deal with that properly, but now that you’re in PEM format you can use openssl. Share and Enjoy — Quinn “The Eskimo!” @ Developer Technical Support @ Apple let myEmail = eskimo + 1 + @ + apple.com
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