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DTiPhoneSimulatorErrorDomain Code 2

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Reply to C function in library code gets stripped when distributed
Here is a more step by step breakdown of the problem I have a iOS library that exposes a C function. This function is marked with default visibility and used via attribute tags to prevent the compiler/linker from stripping it #ifdef __cplusplus #define DYLIB_EXPORT extern C __attribute__((visibility(default))) __attribute__((used)) #else #define DYLIB_EXPORT __attribute__((visibility(default))) __attribute__((used)) #endif DYLIB_EXPORT bool say_hello_world(); #import helper_functions.h #import bool say_hello_world() { NSLog(@Hello WORLD 🟢!); return true; } From a dynamic library, called sdk, I want to call this function. In this example it's a Rust lib unsafe extern C { fn say_hello_world() -> bool; } #[unsafe(no_mangle)] extern C fn sdk_init() -> i32 { unsafe { say_hello_world(); } return 0; } When the app is compiled and launched from Xcode (either on debug or release schemes) then this works, the following snippet works and prints the hello WORLD message: #import OpacityObjCWrapper.h #import helper
Topic: Programming Languages SubTopic: General Tags:
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Reply to Infinite loop getting "_dismiss changed"
I have managed to reproduce unwanted _dismiss changed behavior in the strangest way possible. If you add ANY StoreKit code then on swiping up (i.e. exiting the app) and returning it will produce a bunch of changes. In my app, this was an extremely disruptive bug as it would cause my WebView to reset, losing all state. Here's the code: import SwiftUI import StoreKit struct ContentView: View { @Environment(.dismiss) private var dismiss var body: some View { let _ = Self._printChanges() VStack { Image(systemName: globe) .imageScale(.large) .foregroundStyle(.tint) Text(Hello, world!) // Any StoreKit code causes `_dismiss changed.`. Comment the line below and it no longer happens ProductView(id: testing) } .padding() // Adding a View Modifier like .storeProductTask or .currentEntitlementTask also produces the issue } }
Topic: UI Frameworks SubTopic: SwiftUI Tags:
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Reply to Device and systems for SSC evaluation
Not sure you can know which device will be used. So, you could: mention in the submission that you use LIDAR in your code, test for LIDAR presence https://stackoverflow.com/questions/66383288/check-if-ios-device-has-lidar-in-swift and act accordingly. or ask directly to the support https://developer.apple.com/contact/ Good luck.
Topic: Community SubTopic: Swift Student Challenge Tags:
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CIRAWFilter.outputImage first-time cost is huge (~3s), subsequent calls are ~3ms. Any official way to pre-initialize RAW pipeline (without taking a real photo)?
Hi Apple Developer Forums, I’m developing an iOS camera app that processes RAW captures using Core Image. I’m seeing a large “first use” performance penalty specifically when creating the CIImage from CIRAWFilter.outputImage. What’s slow (important detail) I’m measuring the time for: let rawFilter = CIRAWFilter(imageData: rawData, identifierHint: hint) let ciImage = rawFilter.outputImage This is not CIContext.render(...) / createCGImage(...). It’s just the time to access outputImage (i.e., building the Core Image graph / RAW pipeline setup). Observed behavior First time accessing CIRAWFilter.outputImage: ~3 seconds Second time (same app session, similar RAW): ~3 milliseconds So something heavy is happening only on first use (decoder initialization, pipeline setup, shader/library compilation, caching, etc.). Using Metal System Trace, I also noticed that during the slow first call there are many “Create MTLLibrary” events, while the second call doesn’t show this pattern. Warm-up attempts using bundled DNG I tri
Topic: Media Technologies SubTopic: Photos & Camera Tags:
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Rejoining iOS dev after a long break, what should I relearn?
I’ve been building iOS apps since 2011, took a 4-year break, returned with two new apps, and it feels like organic visibility and indexing have changed drastically compared to earlier releases. Has anyone else noticed slower indexing, fewer automatic mentions, and almost zero organic traction—has discovery changed, or is it just saturation?
Topic: App Store Distribution & Marketing SubTopic: App Store Connect Tags:
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Xcode 26.1 Simulator download fails with DVTDownloadableErrorDomain code 41 and code 49 on macOS 26.1
I'm trying to download an iOS Simulator runtime in Xcode 26.2 or 26.1 on macOS 26.1, but the download keeps failing with the following error: Download failed. Domain: DVTDownloadableErrorDomain Code: 41 Failed fetching catalog for assetType (com.apple.MobileAsset.iOSSimulatorRuntime), serverParameters ({ RequestedBuild = 23C54;}) Domain: DVTDownloadsUtilitiesErrorDomain. Code: -1. Download failed due to a bad URL. (Catalog download for com.apple.MobileAsset.iOSSimulatorRuntime) Domain: com.apple.MobileAssetError.Download Code: 49 User Info: {checkConfiguration = 1;} macOS & Xcode Info: macOS Version: 26.1 (Build 25B78) Xcode Version: 26.2 (24553) (Build 17C52) What I've tried so far: Formatted my Mac and reinstalled Xcode multiple times. Completely deleted Xcode and its related files several times (/Applications/Xcode.app, caches, preferences). Tried different internet connections from multiple locations. Checked Apple servers and verified network. Attempted downloading other si
Topic: Developer Tools & Services SubTopic: Xcode Tags:
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SpeechAnalyzer error "asset not found after attempted download" for certain languages
I am trying to use the new SpeechAnalyzer framework in my Mac app, and am running into an issue for some languages. When I call AssetInstallationRequest.downloadAndInstall() for some languages, it throws an error: Error Domain=SFSpeechErrorDomain Code=1 transcription.ar asset not found after attempted download. The .ar appears to be the language code, which in this case was Arabic. When I call AssetInventory.status(forModules:) before attempting the download, it is giving me a status of downloading (perhaps from an earlier attempt?). If this language was completely unsupported, I would expect it to return a status of unsupported, so I'm not sure what's going on here. For other languages (Polish, for example) SpeechTranscriber.supportedLocale(equivalentTo:) is returning nil, so that seems like a clearly unsupported language. But I can't tell if the languages I'm trying, like Arabic, are supported and something is going wrong, or if this error represents something I can work around. Here's the
Topic: Media Technologies SubTopic: Audio Tags:
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Reply to APNS always returning "discarded as device was offline"
gateway.push.apple.com is the legacy APNs endpoint which has been shutdown earlier in 2025. So, if that's the endpoint you are using your notifications will not work at all. But it would have stopped working back in the spring, not on December 13th. But in any case, if that is indeed the endpoint you are using, you need to update your push servers to use the new HTTP/2 protocol and the new endpoints. You can read more about the new APNs Provider API here: https://developer.apple.com/documentation/usernotifications/setting_up_a_remote_notification_server/sending_notification_requests_to_apns/ If you have issues after migrating to the new interface, or have technical questions about the migration, we are happy to help troubleshoot your push requests once you have started using the HTTP/2 protocol. Please understand that we are unable to help with the specifics of your server side implementation. Unfortunately we also cannot make recommendations on which 3rd party resources to use to make this
Topic: App & System Services SubTopic: Notifications Tags:
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In need of a sample receipt file that uses the SHA-256 hash
My app that's been around since the dawn of the Mac App Store, and which uses its own receipt validation code for 15 years now, recently sometimes triggers a does not support the latest receipt validation requirements error message with my app's users. But I cannot reproduce it, even if I freshly install the app on a M4 Mac running macOS 26.2. So I have a hard time testing my fix. Does someone have a sample receipt file they could share with me (including the MAC from en0 / GUID device ID), or do you know where I can find one that uses the new SHA-256 hash? In fact - when reading https://developer.apple.com/documentation/appstorereceipts/validating-receipts-on-the-device it seems that there's only a SHA-1 after all. So why do some users get the receipt validation requirements message at all? I'm only reading the receipt, decoding the ASN.1 fields and then validate the hash from the receipt (field 5) against the SHA-1 from the GUID+receipt, as always, calling libCrypto's SHA1() function. So, what woul
Topic: App Store Distribution & Marketing SubTopic: General Tags:
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Reply to In need of a sample receipt file that uses the SHA-256 hash
Ahh, finally found the right answer here: https://github.com/iterate-ch/cyberduck/issues/16031 Basically, the default behavior of hiding the actual Mac's MAC address is the cause for the problem (Privaty Wi-Fi Address): If the Mac rotates or replaces the primary network interface's MAC address, and my code still uses the old code that would fetch the MAC from the higher level APIs, it would get the wrong MAC, and then fail the receipt check. To fix this, the MAC has to be fetched from IOKit registry, e.g. as shown in https://developer.apple.com/documentation/appstorereceipts/validating-receipts-on-the-device or https://lapcatsoftware.com/articles/2023/11/4.html
Topic: App Store Distribution & Marketing SubTopic: General Tags:
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Reply to In need of a sample receipt file that uses the SHA-256 hash
I can't seem to edit the message now that I know a bit more. So, here's a reply instead. Turns out that the basic receipt validation does not use SHA-256. The message rather seems to come up when my app quits with exit code 173 due to the receipt being invalid (as in when the app was copied from a different Mac, and now the GUID doesn't match). Whereas older macOS versions would then re-fetch a new receipt (and optionally ask the user to authenticate again), this doesn't apparently happen any more (WhyTF not? Why not keep the old method and only use the new method when the app makes it known to support the new method?!) Forcing a re-fetch of the receipt by simply deleting and re-installing the app from the MAS doesn't appear to work either as the receipt appears to be cached somewhere (again WTF - why isn't macOS being cautious here and falls back to downloading it when the app keeps returning 173???) It appears the app now has to explicitly request a new receipt. With SKReceiptRefreshRequest, which
Topic: App Store Distribution & Marketing SubTopic: General Tags:
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SwiftData CloudKit sync broken on iOS 26
Hi everyone, I’m running into a breaking issue with SwiftData automatic CloudKit syncing on iOS 26, and I'm trying to determine if this is a known regression or a new configuration requirement I missed. The Setup: My setup is extremely standard; I am using the default configuration exactly as described in Apple's documentation here: https://developer.apple.com/documentation/swiftdata/syncing-model-data-across-a-persons-devices The schema is very simple: A single @Model class. No relationships. The Issue: Prior to iOS 26, this exact app was successfully syncing data between devices and to iCloud without issues. Immediately after the iOS 26 update, syncing stopped completely. I haven't changed any code, but when I check the CloudKit Console, I am seeing some BAD_REQUEST errors during sync attempts. Since I am using the default SwiftData sync (and not manual CKRecord handling), I’m not sure how my client code could be triggering a bad request unless the schema requirements have changed under th
Topic: App & System Services SubTopic: iCloud & Data Tags:
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SwiftUI navigationTransition(.zoom) glitches during interactive swipe-back
Hi everyone 👋 I’m fairly new to iOS development and I’ve been stuck on a SwiftUI issue for a while now, so I’m hoping someone here can spot what I’m doing wrong. I’m using navigationTransition(.zoom) together with matchedTransitionSource to animate navigation between views. The UI consists of a grid of items (currently a LazyVGrid, though the issue seems unrelated to laziness). Tapping an item zooms it into its detail view, which is structurally the same view type and can contain further items. All good expect that interactive swipe-back sometimes causes the item to disappear from the grid once the parent view is revealed. This only happens when dismissing via the drag gesture; it does not occur when using the back button. I’ve attached a short demo showing the issue and the Swift file containing the relevant view code. Is there something obvious I’m doing wrong with navigationTransition / matchedTransitionSource, or is this a known limitation or bug with interactive swipe-back? Thanks in advance. i
Topic: UI Frameworks SubTopic: SwiftUI
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