So I'm reworking couple things in my app. And I noticed I had this old code that does the following: Creates a temporary directory. Writes a file in the temporary directory. After the file is written moves the file out of the temporary location and places it in its final destination. Okay so I was not creating the temporary directory using the recommended API. I was simply doing something like this: NSURL *tempDirectory = [NSURL fileURLWithPath:[NSTemporaryDirectory() stringByAppendingPathComponent:[NSProcessInfo processInfo].globallyUniqueString]]; // Create tempDirectory and write files inside it. Now I just changed the code to use the recommended API which takes the the volume of the target destination into account: -URLForDirectory:inDomain:appropriateForURL:create:error:) and I pass in NSItemReplacementDirectory and a url to appropriateForURL so the destination volume is taken into account. Now I have external storage mounted and I use the recommended approach. I discovered NSFileManager simply writes a directory right in a user facing location titled: **(A Document Being Saved By App Name) ** and the folder is not hidden. Is this intended behavior for this API? Are temporary files supposed to be user facing? I know it is good practice to clean up temporary stuff when you are done but in crashes or just forgetting to clean up will leave these behind which isn't the behavior I expect for "temporary files." Also if the user is viewing the folder in Finder they'll see these A Document Being Saved By App Name folders appear and disappear in the window as my app does this work.

The documentation says: The caching behavior of the NSURL and CFURL APIs differ. For NSURL, all cached values (not temporary values) are automatically removed after each pass through the run loop. You only need to call the removeCachedResourceValueForKey: method when you want to clear the cache within a single execution of the run loop. The CFURL functions, on the other hand, do not automatically clear cached resource values. The client has complete control over the cache lifetimes, and you must use CFURLClearResourcePropertyCacheForKey or CFURLClearResourcePropertyCache to clear cached resource values. https://developer.apple.com/documentation/foundation/nsurl/removeallcachedresourcevalues()?language=objc Is this really true? In my experience I've had to explicitly remove cached resource values via -removeAllCachedResourceValues or removeCachedResourceValueForKey: otherwise the URL contains stale values. For example on a URL that no longer exists I attempted to read NSURLIsHiddenKey and the last value was already cached. Instead of getting a NSFileNoSuchFileError I get the old cache value unless explicitly call -removeCachedResourceValueForKey: first and I'm fairly certain the value was cached on a previous run loop churn.

When I appendAttributedString to [textView textStorage] it does not appear on the scrollable TextView. However when I NSLog the [textView textStorage] the Attributed string is outputted, and is therefore stored in the textView, see below. Occurs every time I ask to see the AttributedString I send to the textView. [textView textStorage] attributedString I need to see the attributedString displayed on the ScrollableTextView, but I don't know why I cannot see it.

Running print operation on WKWebView I hit EXC_BREAKPOINT and there is all kinds of console spew that looks concerning: ERROR: The NSPrintOperation view's frame was not initialized properly before knowsPageRange: returned. (WKPrintingView) ** CGContextClipToRect: invalid context 0x0. If you want to see the backtrace, please set CG_CONTEXT_SHOW_BACKTRACE environmental variable.** WebContent[7743] networkd_settings_read_from_file Sandbox is preventing this process from reading networkd settings file at "/Library/Preferences/com.apple.networkd.plist", please add an exception. CRASHSTRING: XPC_ERROR_CONNECTION_INVALID from launchservicesd CRASHSTRING: rdar://problem/28724618 Process unable to create connection because the sandbox denied the right to lookup com.apple.coreservices.launchservicesd and so this process cannot talk to launchservicesd. WebContent[7921] The sandbox in this process does not allow access to RunningBoard. Safe to ignore all this?

Hello, I'm trying to make a white-Label sort of thing for my app, that is: a script runs before the app launches, sets a certain LaunchAgent command that sets and environment variable, and based on that variable's value tha main app's icon changes to a certain logo (change only happens in the dock because changing the icon on disk breaks the signature) When the app launches it takes a noticeable time until the dock icon changes to what I want, so I worked around that by setting the app's plist property to hide the dock icon and then when the app is launched I call an objc++ function to display the icon in the dock again (this time it displays as the new icon) The showing happens through [NSApp setActivationPolicy:NSApplicationActivationPolicyRegular]; The problem happens when I try to close the app, it returns back to the old logo before closing which is what I want to prevent. I tried hiding the app dock icon before closing but even the hiding itself changes the icon before hiding The hiding happens through [NSApp setActivationPolicy:NSApplicationActivationPolicyProhibited]; My goal is that the main app icon doesn't appear to the user through the dock, and that the icon that is only visible is the other one that changes during runtime The reason for this is that I have an app that should be visible differently depending on an environment variable that I set using an installer app. The app is the same for all users with very minor UI adjustments depending on that env variable's value. So instead of creating different versions of the app I'd like to have just 1 version that adjusts differently depending on the env variable's value. Somehow this is the only step left to have a smooth experience Feel free to ask more clarification questions I'd be happy to help Thank you

Introduction: I’m encountering a consistent crash in production on iOS 26.2 (build 23C55). The crash occurs deep within libicucore when calling [NSDateFormatter dateFromString:]. Crash Summary: Exception Type: SIGSEGV (SEGV_ACCERR) Fault Address: 0xffffffff Thread: Crashed on Main Thread (Thread 0) Library: libicucore.A.dylib Code Snippet: The crash is triggered by the following method. It converts a string to an NSDate using a specific format and locale: // 获取日期date - (NSDate *)getDateWithTime:(NSString *)time formatter:(NSString *)formatterStr { NSDateFormatter *formatter = [[NSDateFormatter alloc] init]; [formatter setDateFormat:formatterStr]; formatter.timeZone = [NSTimeZone timeZoneWithName:@"Asia/Shanghai"]; formatter.locale = [[NSLocale alloc] initWithLocaleIdentifier:@"en_US_POSIX"]; return [formatter dateFromString:time]; } Backtrace: Here is the relevant part of the crash report: Incident Identifier: E24485B6-C53E-4115-A6CF-A7E4A952AD50 CrashReporter Key: 21FAC1CF-F56B-409A-98AA-351D3D2EB06C Hardware Model: iPhone18,2 Code Type: ARM-64 Parent Process: [1] Date/Time: 2026-01-12T01:32:25Z OS Version: iPhone OS 26.2 (23C55) Report Version: 105 SDK Version: 0.0.4 Exception Type: SIGSEGV Exception Codes: SEGV_ACCERR at 0xffffffff Crashed Thread: 0 Thread 0 Crashed: 0 libicucore.A.dylib 0x000000019b81def8 0x19b74a000 + 868088 1 libicucore.A.dylib 0x000000019b7da91c 0x19b74a000 + 592156 2 libicucore.A.dylib 0x000000019b8d8340 0x19b74a000 + 1631040 3 libicucore.A.dylib 0x000000019b8eae18 0x19b74a000 + 1707544 4 libicucore.A.dylib 0x000000019b8eb600 0x19b74a000 + 1709568 5 libicucore.A.dylib 0x000000019b878be4 0x19b74a000 + 1240036 6 libicucore.A.dylib 0x000000019b87ae84 0x19b74a000 + 1248900 7 libicucore.A.dylib 0x000000019b87b2dc 0x19b74a000 + 1250012 8 libicucore.A.dylib 0x000000019b9564ac 0x19b74a000 + 2147500 9 libicucore.A.dylib 0x000000019b954afc 0x19b74a000 + 2140924 10 libicucore.A.dylib 0x000000019b952794 0x19b74a000 + 2131860 11 libicucore.A.dylib 0x000000019b98689c 0x19b74a000 + 2345116 12 CoreFoundation 0x00000001895dbfe0 0x18953d000 + 651232 13 CoreFoundation 0x00000001895dbaa0 0x18953d000 + 649888 14 Foundation 0x0000000186d2029c 0x186b88000 + 1671836 15 Foundation 0x00000001874a62dc 0x186b88000 + 9560796 16 Foundation 0x00000001874a6384 0x186b88000 + 9560964 17 xxxx 0x0000000105ea6e30 -[xxxxx getDateWithTime:formatter:] + 168 and Thread 0 crashed with ARM-64 Thread State: pc: 0x000000019b81def8 fp: 0x000000016f96bc10 sp: 0x000000016f96bbd0 x0: 0x00000000ffffffff x1: 0x000000019ba1e8e0 x2: 0x0000000000000002 x3: 0x000000000000000b x4: 0x0000000000000074 x5: 0x0000000000000069 x6: 0x0000000000000000 x7: 0xfffff0003ffff800 x8: 0x000000009ba18014 x9: 0x00000001148dffd0 x10: 0x0000000000000002 x11: 0x0000000000000004 x12: 0x0000000000000220 x13: 0x0000000000000030 x14: 0x000000015b6f36b8 x15: 0x000000015cfe0000 x16: 0x00000002a19d0ff0 x17: 0x00000001f5590a70 x18: 0x0000000000000000 x19: 0x000000016f96bc30 x20: 0x0000000000000000 x21: 0x000000015cfe3200 x22: 0x000000019ba18014 x23: 0x0000000000000000 x24: 0x000000015cfe32a0 x25: 0x0000000000000003 x26: 0x0000000000000000 x27: 0x0000000000000000 x28: 0x000000015cfe3200 lr: 0x000000019b7da958 cpsr: 0x00000000a0000000

Hello, I'm currently working on an app that will have a different name (and UI) depending on an environment variable that is set by that app's custom installer that I also wrote. I'm trying to change the app name that is displayed in the menu bar (top left) programmatically. I've done some research and found that it's probably not possible to do so because it's fetched from the app's Info.plist The answer is probably already there but I'll ask the question: Is it possible to change the app's name in the menu bar without tampering with the Info.plist (as it will break the signature at runtime, and it can't be done at compile time) The use case here is that I'm shipping a single app with multiple installers, because the app will be the same for all sets of users but it will have minor UI changes (which in my opinion, don't need an entire separate release), the installers will set a flag that the app will, based on, change its UI to the corresponding set of users. For the most part it's been successful but only small issue remain like this one. The reason it's done like that is when updating I'll ship 1 release for all users to update rather than having to ship multiple releases with no difference between them

When I call this method on a thread that isn`t thread. And chose main thread check on target, The Console show the world : Main Thread Checker: UI API called on a background thread: -[UIApplication canOpenURL:] PID: 8818, TID: 10191278, Thread name: (none), Queue name: com.myqueue.canopen, QoS: 0 Backtrace: 4 TestDemo 0x0000000102f6c068 __39-[AppTools isExists:]_block_invoke_3 + 892 5 CoreFoundation 0x000000019e22995c 7519E999-1053-3367-B9D5-8844F6D3BDC6 + 1042780 6 CoreFoundation 0x000000019e12ec98 7519E999-1053-3367-B9D5-8844F6D3BDC6 + 15512 7 TestDemo 0x0000000102f6bba0 __39-[AppTools isExists:]_block_invoke_2 + 424 8 libdispatch.dylib 0x0000000103a4d7fc _dispatch_call_block_and_release + 24 9 libdispatch.dylib 0x0000000103a4ebd8 _dispatch_client_callout + 16 10 libdispatch.dylib 0x0000000103a55b48 _dispatch_lane_serial_drain + 744 11 libdispatch.dylib 0x0000000103a566e4 _dispatch_lane_invoke + 448 12 libdispatch.dylib 0x0000000103a61adc _dispatch_workloop_worker_thread + 1324 13 libsystem_pthread.dylib 0x000000019df72b88 _pthread_wqthread + 276 14 libsystem_pthread.dylib 0x000000019df75760 start_wqthread + 8

When trying to open an encrypted CoreML model file on a system with SIP disabled, the error message is Failed to generate key request for <...> with error: -42187 This should state that SIP is disabled and needs to be enabled.

This is a continuation of https://developer.apple.com/forums/thread/795348 I rambled too much and did not understand the underlaying problem. The problem is that I have a C function in a iOS library. I want to call this C function from a dylib that this library loads on runtime. When running directly from Xcode (either in debug or release mode) this works correctly. However, when the app is uploaded to testflight or distributed for debugging then the function is stripped and a null function pointer exception crashes the app. In the last post it was really hard to explain and I was pressed on time but I've created a minimal reproducible example: https://github.com/ospfranco/dylib_crash The instructions to run and reproduce the crash are on the README.

Hi, I have started facing an issue with Xcode since updating to macOS 26.1. The debugger is not stopping at breakpoints in Objective-C code, however breakpoints in Swift file are working fine. I am using Xcode 16.4. For breakpoints in Objective-C files I have started to get this message since the OS update - 'Xcode won't pause at this breakpoint because it has not been resolved.' I have already tried cleaning derived data and build folder. I do not want to upgrade to Xcode 26. Could someone help with the fix? Thanks

I am developing an iOS application that supports screen mirroring to Google TV (or Chromecast with Google TV). My goal is to mirror the iPhone/iPad screen in real time to a Google TV device. What I Have Tried So Far I have explored multiple approaches but haven't found a direct way to achieve low-latency screen mirroring. Here are some of my findings: Google Cast SDK: Google Cast SDK is primarily designed for casting media (videos, images, audio) rather than real-time mirroring. It supports custom receiver applications, but there are no direct APIs for full screen mirroring. Casting a recorded video is possible, but it introduces latency and is not real-time. ReplayKit for Screen Capture: RPScreenRecorder.shared().startCapture(handler: ...) allows capturing the iPhone screen as a video stream. However, sending this stream to Google TV in real time is a challenge. I could potentially encode the video as HLS and stream it, but the delay is significant. RTSP/UDP Streaming: Some third-party libraries support RTSP/UDP streaming for real-time screen sharing. Google TV does not natively support RTSP, making this approach difficult. My Questions: Is it possible to achieve real-time screen mirroring on Google TV using Google Cast SDK? Does Google TV support WebRTC or any low-latency streaming protocol that can be used from iOS? Are there any alternative approaches to mirror an iOS screen to Google TV with minimal latency? I would appreciate any guidance, code examples, or references to relevant documentation.

Recently, we have adapted the passkey function on the Mac, but we always encounter the error message "Unable to verify the web credentials association of xxx with domain aaa. Please try again in a few seconds." We can confirm that https://aaa/.well-known/apple-app-site-association has been configured and is accessible over the public network. Additionally, the entitlements in the app have also been set with webcredentials:aaa. This feature has been experiencing inconsistent performance. When I restart my computer or reinstall the pkg, this feature may work or it may still not work. I believe this is a system issue. Here is feed back ID: FB20876945 In the feedback, I provided the relevant logs. If you have any suggestions or assistance, please contact me. I would be extremely grateful!

I'm reading a bit outdated book about Cocoa/Objective-C applications development and I'm trying to code some examples. And so I ended up with an almost empty NSDocument-based app with runtime errors like that: Internal inconsistency in menus - menu <NSMenu: 0xbc726d040> Title: Window Supermenu: 0xbc726d080 (Main Menu), autoenable: YES Previous menu: 0x0 (None) Next menu: 0x0 (None) Items: ( "<NSMenuItem: 0xbc6fcd9a0 Minimize, ke='Command-M'>", "<NSMenuItem: 0xbc6fcda40 Zoom, ke mask=''>", "<NSMenuItem: 0xbc6fcdae0, separator, ke mask=''>", "<NSMenuItem: 0xbc6fcd900 Bring All to Front, ke mask=''>" ) believes it has <NSMenu: 0xbc726d080> Title: Main Menu Supermenu: 0x0 (None), autoenable: YES Previous menu: 0x0 (None) Next menu: 0x0 (None) Items: ( ) as a supermenu, but the supermenu does not seem to have any item with that submenu It looks like as if the menu tries to include itself as a submenu. Am I right? I have no ideas what led to this. If I'm not mistaken this has started since macOS Tahoe. The code that is not a boilerplate one I have: // Document.m #import "Document.h" @implementation Document @synthesize text; - (NSString *)windowNibName { return @"SampleDocument"; } - (void)windowControllerDidLoadNib:(NSWindowController *)aController { [super windowControllerDidLoadNib:aController]; if (self.text == nil) { self.text = @""; } self.textField.stringValue = self.text; } - (NSData *)dataOfType:(NSString *)typeName error:(NSError **)outError { self.text = self.textField.stringValue; return [self.text dataUsingEncoding:NSUTF8StringEncoding]; } - (BOOL)readFromData:(NSData *)data ofType:(NSString *)typeName error:(NSError **)outError { if ([data length] > 0) { NSString * string = [[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding]; self.text = string; } else { self.text = @""; } return YES; } + (BOOL)autosavesInPlace { return YES; } @end There are two xib's: MainMenu.xib and Document.xib but I won't include them here. Please advise how to fix this menu issue.

The MXCrashDiagnostic and MXHangDiagnostic reports are not being returned via MXMetricManager on the next app launch in iOS 17.2, 17.3, 17.4, and 17.5. This issue prevents collection of crash and hang diagnostics through the MetricKit framework, which worked as expected on earlier and later (18, 26) iOS versions. Steps to Reproduce:- Integrate MetricKit in an iOS app using: MXMetricManager.shared.add(self) and implement: func didReceive(_ payloads: [MXDiagnosticPayload]) Install and run the app on a device running iOS 17.2 or later. Cause a crash or hang scenario (e.g., dereference a null pointer or block the main thread). Relaunch the app after the system terminates it. Observe the callback for diagnostic payloads. Expected Behavior MXMetricManager.shared.didReceive(_:) should be invoked on the next launch, returning diagnostic payloads that include MXCrashDiagnostic or MXHangDiagnostic objects. Actual Behavior: No diagnostics are returned on subsequent launches. didReceive(_:) is not triggered, or the diagnostic payloads array is empty. This behavior is reproducible across multiple devices and iOS versions (17.2–17.5). iOS Versions: 17.2, 17.3, 17.4, 17.5 Devices Tested: iPhone 14, iPhone 15 Pro Xcode Version: 15.2 / 15.3 Framework: MetricKit Diagnostic Type: Crash and Hang

Hello, I have a question about data deserialization using NSKeyedUnarchiver in iOS SDK development. Current Situation: Previously, we were using the NSKeyedUnarchiver.unarchiveObject(with: Data) function We have changed to using the NSKeyedUnarchiver.unarchivedObject(ofClasses:from:) method to deserialize complex objects stored in UserDefaults We need to include all types in the ofClasses parameter, including Swift primitive types as well as various custom classes and structs within the project Questions: Implementation Approach: Is it correct pattern to include all classes defined in the project in the ofClasses array? Is this approach recommended? Runtime Stability: When using this approach, is there a possibility of runtime crashes? Are there any performance issues? Alternative Methods: If the current approach is not the correct pattern, what alternatives should we consider? Current Code Structure: All model classes conform to the NSSecureCoding protocol We use the requiringSecureCoding: true parameter We use a whitelist approach, explicitly listing only allowed classes I would like to know if this structure is appropriate, or if we should consider a different approach. Thank you.

Hi, I’m trying to open a GPX file (route.gpx) from the Files app on my iPhone using my app (e.g., Aqua Map). Since the latest iOS update (iOS 26), when I long-press the file and tap “Open with…”, my app does not appear in the list anymore. I’ve checked that my app has the correct permissions for Files and Folders. I’m wondering: Is this a user-side issue (Settings on iPhone)? Or does it require developer-side changes in the app (Info.plist / UTI declarations) to make .gpx files appear in “Open with…” or “Share” menus? What is the proper way to make my app appear as an option to open GPX files in Files.app on iOS 26? Thanks in advance!

I have a custom object which gets passed back to the main app from XPC. I whitelist it like so: NSSet *expectedClass = [NSSet setWithObjects:[NSArray class], [MyCustomClass class], nil]; [interface setClasses:expectedClass forSelector:@selector(myMethodNameHere:withCompletion:) argumentIndex:0 ofReply:YES]; Now my custom class conforms to NSSecureCoding. It does have an array property of another custom class. @property (nonatomic,readonly) NSArray *arraypropertyOfOtherClass; Which is decoded in -initWithCoder: using: -decodeArrayOfObjectsOfClasses:forKey: Now on macOS Tahoe this is all walking fine. But I just tested on macOS Monterey and I get the following error: Exception: decodeObjectForKey: too many nested collections when explicitly decoding a single collection. How should I handle this for earlier versions of macOS?

To establish a privileged helper daemon from a command line app to handle actions requiring root privileges I still use the old way of SMJobBless. But this is deprecated since OSX 10.13 and I want to finally update it to the new way using SMAppService. As I'm concerned with securing it against malicious exploits, do you have a recommended up-to-date implementation in Objective-C establishing a privileged helper and verifying it is only used by my signed app? I've seen the suggestion in the documentation to use SMAppService, but couldn't find a good implementation covering security aspects. My old implementation in brief is as follows: bool runJobBless () { // check if already installed NSFileManager* filemgr = [NSFileManager defaultManager]; if ([filemgr fileExistsAtPath:@"/Library/PrivilegedHelperTools/com.company.Helper"] && [filemgr fileExistsAtPath:@"/Library/LaunchDaemons/com.company.Helper.plist"]) { // check helper version to match the client // ... return true; } // create authorization reference AuthorizationRef authRef; OSStatus status = AuthorizationCreate (NULL, kAuthorizationEmptyEnvironment, kAuthorizationFlagDefaults, &authRef); if (status != errAuthorizationSuccess) return false; // obtain rights to install privileged helper AuthorizationItem authItem = { kSMRightBlessPrivilegedHelper, 0, NULL, 0 }; AuthorizationRights authRights = { 1, &authItem }; AuthorizationFlags flags = kAuthorizationFlagDefaults | kAuthorizationFlagInteractionAllowed | kAuthorizationFlagPreAuthorize | kAuthorizationFlagExtendRights; status = AuthorizationCopyRights (authRef, &authRights, kAuthorizationEmptyEnvironment, flags, NULL); if (status != errAuthorizationSuccess) return false; // SMJobBless does it all: verify helper against app and vice-versa, place and load embedded launchd.plist in /Library/LaunchDaemons, place executable in /Library/PrivilegedHelperTools CFErrorRef cfError; if (!SMJobBless (kSMDomainSystemLaunchd, (CFStringRef)@"com.company.Helper", authRef, &cfError)) { // check helper version to match the client // ... return true; } else { CFBridgingRelease (cfError); return false; } } void connectToHelper () { // connect to helper via XPC NSXPCConnection* c = [[NSXPCConnection alloc] initWithMachServiceName:@"com.company.Helper.mach" options:NSXPCConnectionPrivileged]; c.remoteObjectInterface = [NSXPCInterface interfaceWithProtocol:@protocol (SilentInstallHelperProtocol)]; [c resume]; // call function on helper and wait for completion dispatch_semaphore_t semaphore = dispatch_semaphore_create (0); [[c remoteObjectProxy] callFunction:^() { dispatch_semaphore_signal (semaphore); }]; dispatch_semaphore_wait (semaphore, dispatch_time (DISPATCH_TIME_NOW, 10 * NSEC_PER_SEC)); dispatch_release (semaphore); [c invalidate]; [c release]; }

This topic area is about the programming languages themselves, not about any specific API or tool. If you have an API question, go to the top level and look for a subtopic for that API. If you have a question about Apple developer tools, start in the Developer Tools & Services topic. For Swift questions: If your question is about the SwiftUI framework, start in UI Frameworks > SwiftUI. If your question is specific to the Swift Playground app, ask over in Developer Tools & Services > Swift Playground If you’re interested in the Swift open source effort — that includes the evolution of the language, the open source tools and libraries, and Swift on non-Apple platforms — check out Swift Forums If your question is about the Swift language, that’s on topic for Programming Languages > Swift, but you might have more luck asking it in Swift Forums > Using Swift. General: Forums topic: Programming Languages Swift: Forums subtopic: Programming Languages > Swift Forums tags: Swift Developer > Swift website Swift Programming Language website The Swift Programming Language documentation Swift Forums website, and specifically Swift Forums > Using Swift Swift Package Index website Concurrency Resources, which covers Swift concurrency How to think properly about binding memory Swift Forums thread Other: Forums subtopic: Programming Languages > Generic Forums tags: Objective-C Programming with Objective-C archived documentation Objective-C Runtime documentation Share and Enjoy — Quinn “The Eskimo!” @ Developer Technical Support @ Apple let myEmail = "eskimo" + "1" + "@" + "apple.com"