My app is crashing in CoreGraphics. As per the observations, it started crashing for Mac OS 14.4 and 14.4.1 on Arm machines. It is observed on multiple machines. Can someone please help on this? Following is the backtrace: Process: MyApp [1300] Path: /Applications/MyApp.app/Contents/MacOS/MyApp Identifier: com.MyCompany.MyApp Version: 7.2.3 (???) Code Type: ARM-64 (Native) Parent Process: launchd [1] User ID: 502 Date/Time: 2024-04-23 20:48:08.7647 +0530 OS Version: macOS 14.4.1 (23E224) Report Version: 12 Anonymous UUID: 6DAE9C94-37AC-96D0-7221-3AAA99D9E5F6 Sleep/Wake UUID: 03812728-62F0-45A4-86FC-07E151462C11 Time Awake Since Boot: 11000 seconds Time Since Wake: 1385 seconds System Integrity Protection: enabled Crashed Thread: 0 Dispatch queue: com.apple.main-thread Exception Type: EXC_BAD_ACCESS (SIGSEGV) Exception Codes: KERN_INVALID_ADDRESS at 0x0000000000000008 Exception Codes: 0x0000000000000001, 0x0000000000000008 Termination Reason: Namespace SIGNAL, Code 11 Segmentation fault: 11 Terminating Process: exc handler [1300] VM Region Info: 0x8 is not in any region. Bytes before following region: 4338843640 REGION TYPE START - END [ VSIZE] PRT/MAX SHRMOD REGION DETAIL UNUSED SPACE AT START ---> __TEXT 1029d8000-1029e4000 [ 48K] r-x/r-x SM=COW /Applications/MyApp.app/Contents/MacOS/MyApp Thread 0 Crashed:: Dispatch queue: com.apple.main-thread 0 CoreGraphics 0x186aabdac shape_union + 656 1 CoreGraphics 0x186aababc shape_union_with_bounds + 128 2 CoreGraphics 0x186aab9f4 CGRegionCreateUnionWithRect + 240 3 AppKit 0x184b439dc 0x18473e000 + 4217308 4 AppKit 0x184b2ad4c 0x18473e000 + 4115788 5 AppKit 0x184dc358c -[NSViewBackingLayer setNeedsDisplayInRect:] + 176 6 AppKit 0x184790874 -[NSView setNeedsDisplayInRect:] + 396 7 Foundation 0x182070914 __NSThreadPerformPerform + 264 8 CoreFoundation 0x180f21eb0 __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION__ + 28 9 CoreFoundation 0x180f21e44 __CFRunLoopDoSource0 + 176 10 CoreFoundation 0x180f21bb4 __CFRunLoopDoSources0 + 244 11 CoreFoundation 0x180f207a0 __CFRunLoopRun + 828 12 CoreFoundation 0x180f1fe0c CFRunLoopRunSpecific + 608 13 HIToolbox 0x18b6bb000 RunCurrentEventLoopInMode + 292 14 HIToolbox 0x18b6bae3c ReceiveNextEventCommon + 648 15 HIToolbox 0x18b6bab94 _BlockUntilNextEventMatchingListInModeWithFilter + 76 16 AppKit 0x184778970 _DPSNextEvent + 660 17 AppKit 0x184f6adec -[NSApplication(NSEventRouting) _nextEventMatchingEventMask:untilDate:inMode:dequeue:] + 700 18 AppKit 0x18476bcb8 -[NSApplication run] + 476 19 libffi.dylib 0x191df8050 ffi_call_SYSV + 80 20 libffi.dylib 0x191e00ae0 ffi_call_int + 1212 21 _objc.cpython-39-darwin.so 0x10700a47c PyObjCFFI_Caller_SimpleSEL + 1204 22 _objc.cpython-39-darwin.so 0x107034e94 objcsel_vectorcall_simple + 768 23 Python 0x104312ddc call_function + 124 24 Python 0x104311ac0 _PyEval_EvalFrameDefault + 29288 25 Python 0x10427a720 _PyFunction_Vectorcall + 628 26 Python 0x104312ddc call_function + 124 27 Python 0x104311ac0 _PyEval_EvalFrameDefault + 29288 28 Python 0x10427a57c _PyFunction_Vectorcall + 208 29 Python 0x104312ddc call_function + 124 30 Python 0x104311a4c _PyEval_EvalFrameDefault + 29172 31 Python 0x10427a57c _PyFunction_Vectorcall + 208 32 Python 0x104312ddc call_function + 124 33 Python 0x104311ac0 _PyEval_EvalFrameDefault + 29288 34 Python 0x10427a57c _PyFunction_Vectorcall + 208 35 Python 0x104312ddc call_function + 124 36 Python 0x104311aec _PyEval_EvalFrameDefault + 29332 37 Python 0x10427a57c _PyFunction_Vectorcall + 208 38 Python 0x104312ddc call_function + 124 39 Python 0x104311aec _PyEval_EvalFrameDefault + 29332 40 Python 0x1043131a0 _PyEval_EvalCode + 620 41 Python 0x10430a7d0 PyEval_EvalCode + 80 42 MyApp 0x1029dd440 0x1029d8000 + 21568 43 MyApp 0x1029dd7c0 0x1029d8000 + 22464 44 dyld 0x180aba0e0 start + 2360

Hello, I'm trying to simulate miscellaneous crashes to test my handlers. Things works as expected with NSException and C++ exceptions, however I cannot find a way to trig a C signal. I tried with this code: NSArray *runningApplications = [NSRunningApplication runningApplicationsWithBundleIdentifier:@"com.myCompany.myApp"]; NSRunningApplication *app = runningApplications[0]; UInt32 pid = [app processIdentifier]; kill(pid, SIGABRT); It is caught by my handler, but it doesn't crash the app (although it's detached from the debugger), I can even continue using the app normally. I'm wondering if this could be related to something wrong in my handler (especially on how it ends): signal(sig, SIG_IGN); dispatch_source_t source = dispatch_source_create(DISPATCH_SOURCE_TYPE_SIGNAL, sig, 0, dispatch_get_global_queue(0, 0)); dispatch_source_set_event_handler(source, ^{ // I write some logs on disk here, then uninstall the handlers associated with this or that signal: for(int i=0; i<SignalSourceCount; i++) { if (_signalSources[i]) { dispatch_source_cancel(_signalSources[i]); _signalSources[i] = NULL; } } }); dispatch_resume(source); I've seen some examples finishing rather with exit() or abort(). Abort crashes the app as expected, however the Crash Report produced by Apple then focuses on the handler instead of the code triggering the signal... Any help appreciated, thanks

Hi, I am experience crashes with my application after code signing, this didn't happen before. Does OpenGL require special permissions? GSequencer stack-trace gtk4 crash by, Joël

Hi, I have codesigned my application and after this macos won't run the binary anymore. codesign -f -o runtime --timestamp -s "Developer ID Application: YOUR NAME (TEAM_ID)" --entitlements $HOME/workspace/GSequencer-cocoa/gsequencer-macos/macos-contrib/GSequencer.entitlements -i com.gsequencer.GSequencer --deep $HOME/workspace/GSequencer-cocoa/gsequencer-macos/build/universal/GSequencer.app Verify signature works. codesign -vv $HOME/workspace/GSequencer-cocoa/gsequencer-macos/build/universal/GSequencer.app The same for the DMG file, still doesn't work anymore. codesign -f -o runtime --timestamp -s "Developer ID Application: YOUR NAME (TEAM_ID)" $HOME/workspace/GSequencer-cocoa/gsequencer-macos/build/arm64/GSequencer-6.9.1.dmg I would love to distribute my application with code signing. Note all libraries are built using clang or clang++. I figured out that when I leave entitlements away it would launch but complains about library signatures. regards, Joël

I tried doing the outlets for all the controls, then making a nsview in the method for a button that declares a view, then I set initwithframe to be sent to a variable typed 'id' and accessing that variable I was able to add nsbuttoncell to the variable, then I added the subview to the. main tableview here's the code I used: NSView *viewptr = [[NSView alloc]init]; NSButtonCell *bCell1 = [[NSButtonCell alloc]init]; NSRect rect; [bCell1 setTitle:@"click"]; rect.size.width = 2; rect.size.height = 1; id temp,x; temp = [viewptr initWithFrame:rect]; [temp addObject:bCell1]; [_cocoa_test_scrollview addSubview:temp]; is there anything im missing? the app keeps crashing and spiting out debug messages, like: -[NSView addObject:]: unrecognized selector sent to instance 0x12ee0ae60 ( 0 CoreFoundation 0x0000000186efaccc __exceptionPreprocess + 176 1 libobjc.A.dylib 0x00000001869e2788 objc_exception_throw + 60 2 CoreFoundation 0x0000000186fad02c -[NSObject(NSObject) __retain_OA] + 0 3 CoreFoundation 0x0000000186e64cdc forwarding + 1580 4 CoreFoundation 0x0000000186e645f0 _CF_forwarding_prep_0 + 96 5 objc_cocoa_test_image_3 0x0000000100608ca4 -[AppDelegate cocoa_test_button1_add:] + 264 6 AppKit 0x000000018a881c70 -[NSApplication(NSResponder) sendAction:to:from:] + 460 7 AppKit 0x000000018a881a74 -[NSControl sendAction:to:] + 72 8 AppKit 0x000000018a8819b8 __26-[NSCell _sendActionFrom:]_block_invoke + 100 9 AppKit 0x000000018a8818e0 -[NSCell _sendActionFrom:] + 204 10 AppKit 0x000000018a881804 -[NSButtonCell _sendActionFrom:] + 88 11 AppKit 0x000000018a87ee38 NSControlTrackMouse + 1480 12 AppKit 0x000000018a87e844 -[NSCell trackMouse:inRect:ofView:untilMouseUp:] + 144 13 AppKit 0x000000018a87e6fc -[NSButtonCell trackMouse:inRect:ofView:untilMouseUp:] + 488 14 AppKit 0x000000018a87dbd0 -[NSControl mouseDown:] + 448 15 AppKit 0x000000018a87c99c -[NSWindow(NSEventRouting) _handleMouseDownEvent:isDelayedEvent:] + 3472 16 AppKit 0x000000018a807f78 -[NSWindow(NSEventRouting) _reallySendEvent:isDelayedEvent:] + 364 17 AppKit 0x000000018a807c38 -[NSWindow(NSEventRouting) sendEvent:] + 284 18 AppKit 0x000000018aecde70 -[NSApplication(NSEventRouting) sendEvent:] + 1604 19 AppKit 0x000000018ab1b8cc -[NSApplication _handleEvent:] + 60 20 AppKit 0x000000018a6cfcdc -[NSApplication run] + 512 21 AppKit 0x000000018a6a6f54 NSApplicationMain + 880 22 objc_cocoa_test_image_3 0x0000000100608a68 main + 60 23 dyld 0x0000000186a1e0e0 start + 2360 ) can anyone point me in the right direction?

In StoreKit 1 and Objective-C, how do I obtain currently active subscriptions? I'm trying to obtain this information: The currently active (i.e. valid and not refunded) subscription in a subscription group A "pending" subscription, if any (when changing subscription types mid-period), and its starting date Sadly, all StoreKit 1 documents are buried deep under StoreKit 2 docs. Using StoreKit 2 is not an option.

I'm implementing a bitonic sort in Metal with a Swift app. This requires 100's kernel dispatch calls for each of the swap stages which touch the whole array, the work required by the GPU is small. I haven't been able to get this to run fast enough in Swift and it seems its due to a high overhead for each dispatchThread command. I rewrote the test program in Objective C with a super-simple kernel function and its runs 25x faster from Objective C! Kernel function kernel void fill(device uint8_t *array [[buffer(0)]], const device uint32_t &N [[buffer(1)]], const device uint8_t &value [[buffer(2)]], uint i [[thread_position_in_grid]]) { if (i < N) { array[i] = value; } } The Swift code is: func fill(pso:MTLComputePipelineState, buffer:MTLBuffer, N: Int, passes: Int) { guard let commandBuffer = commandQueue.makeCommandBuffer() else { return } let gridSize = MTLSizeMake(N, 1, 1) var threadGroupSize = pso.maxTotalThreadsPerThreadgroup if (threadGroupSize > N) { threadGroupSize = N; } let threadgroupSize = MTLSizeMake(threadGroupSize, 1, 1); for pass in 0..<passes { guard let computeEncoder = commandBuffer.makeComputeCommandEncoder() else { return } var value:UInt8 = UInt8(pass); var NN:UInt32 = UInt32(N); computeEncoder.setComputePipelineState(pso) computeEncoder.setBuffer(buffer, offset: 0, index: 0) computeEncoder.setBytes(&NN, length: MemoryLayout<UInt32>.size, index: 1) computeEncoder.setBytes(&value, length: MemoryLayout<UInt8>.size, index: 2) computeEncoder.dispatchThreadgroups(gridSize, threadsPerThreadgroup: threadgroupSize) computeEncoder.endEncoding() } commandBuffer.commit() commandBuffer.waitUntilCompleted() } let device = MTLCreateSystemDefaultDevice()! let library = device.makeDefaultLibrary()! let commandQueue = device.makeCommandQueue()! let funcFill = library.makeFunction(name: "fill")! let pso = try? device.makeComputePipelineState(function: funcFill) var N = 16384 let passes = 100 let buffer = device.makeBuffer(length:N, options: [.storageModePrivate])! for _ in 1...10 { let startTime = DispatchTime.now() fill(pso:pso!, buffer:buffer, N:N, passes:passes) let endTime = DispatchTime.now() let elapsedTime = endTime.uptimeNanoseconds - startTime.uptimeNanoseconds print("Elapsed time:", Float(elapsedTime)/1_000_000, "ms"); } and the Objective C code (which should be almost identical) is void fill(id<MTLCommandQueue> commandQueue, id<MTLComputePipelineState> funcPSO, id<MTLBuffer> A, uint32_t N, int passes) { id<MTLCommandBuffer> commandBuffer = [commandQueue commandBuffer]; MTLSize gridSize = MTLSizeMake(N, 1, 1); NSUInteger threadGroupSize = funcPSO.maxTotalThreadsPerThreadgroup; if (threadGroupSize > N) { threadGroupSize = N; } MTLSize threadgroupSize = MTLSizeMake(threadGroupSize, 1, 1); for(uint8_t pass=0; pass<passes; pass++) { id<MTLComputeCommandEncoder> computeEncoder = [commandBuffer computeCommandEncoder]; [computeEncoder setComputePipelineState:funcPSO]; [computeEncoder setBuffer:A offset:0 atIndex:0]; [computeEncoder setBytes:&N length:sizeof(uint32_t) atIndex:1]; [computeEncoder setBytes:&pass length:sizeof(uint8_t) atIndex:2]; [computeEncoder dispatchThreads:gridSize threadsPerThreadgroup:threadgroupSize]; [computeEncoder endEncoding]; } [commandBuffer commit]; [commandBuffer waitUntilCompleted]; } int main() { NSError *error; id<MTLDevice> device = MTLCreateSystemDefaultDevice(); id<MTLLibrary> library = [device newDefaultLibrary]; id<MTLCommandQueue> commandQueue = [device newCommandQueue]; id<MTLFunction> funcFill = [library newFunctionWithName:@"fill"]; id<MTLComputePipelineState> pso = [device newComputePipelineStateWithFunction:funcFill error:&error]; // Prepare data int N = 16384; int passes = 100; id<MTLBuffer> bufferA = [device newBufferWithLength:N options:MTLResourceStorageModePrivate]; for(int it=1; it<=10; it++) { CFTimeInterval startTime = CFAbsoluteTimeGetCurrent(); fill(commandQueue, pso, bufferA, N, passes); CFTimeInterval duration = CFAbsoluteTimeGetCurrent() - startTime; NSLog(@"Elapsed time: %.1f ms", 1000*duration); } } The Swift output is: Elapsed time: 89.35556 ms Elapsed time: 63.243744 ms Elapsed time: 62.39568 ms Elapsed time: 62.183224 ms Elapsed time: 63.741913 ms Elapsed time: 63.59463 ms Elapsed time: 62.378654 ms Elapsed time: 61.746098 ms Elapsed time: 61.530384 ms Elapsed time: 60.88774 ms The objective C output is 2024-04-18 19:27:45.704 compute_test[3489:92754] Elapsed time: 3.6 ms 2024-04-18 19:27:45.706 compute_test[3489:92754] Elapsed time: 2.6 ms 2024-04-18 19:27:45.709 compute_test[3489:92754] Elapsed time: 2.6 ms 2024-04-18 19:27:45.712 compute_test[3489:92754] Elapsed time: 2.6 ms 2024-04-18 19:27:45.714 compute_test[3489:92754] Elapsed time: 2.7 ms 2024-04-18 19:27:45.717 compute_test[3489:92754] Elapsed time: 2.8 ms 2024-04-18 19:27:45.720 compute_test[3489:92754] Elapsed time: 2.8 ms 2024-04-18 19:27:45.723 compute_test[3489:92754] Elapsed time: 2.7 ms 2024-04-18 19:27:45.726 compute_test[3489:92754] Elapsed time: 2.5 ms 2024-04-18 19:27:45.728 compute_test[3489:92754] Elapsed time: 2.5 ms I compile the Swift code for Release, optimised for speed. I can't believe there should be a difference here, so what could be different, and what might I be doing wrong? thanks Adrian

Hi, In Windows and Linux, it's possible to ask a printer to print content programmatically in Black & White. This may be referred to as "Monochrome", "Grayscale", "B&W", depending on the device driver. For feature parity with other operating systems, I'd like to do the same -- programmatically -- in macOS using Objective-C or Swift. Is this possible? If not, what's the best, formal way to request this useful OS feature to Apple so that it may be added in a future release? More context about this request: https://github.com/openjdk/jdk/pull/18195

Instruments reveals that the following simple code leaks memory on each delegate invoke: - (void)start { [_urlSession dataTaskWithURL:_url]; } - (void)URLSession:(NSURLSession *)session dataTask:(NSURLSessionDataTask *)dataTask didReceiveData:(NSData *)data { [_data appendData:data]; } I don't have any clue on this leak, it should not happen. What should I do to avoid this?

Domain: com.apple.dt.CoreDeviceError Code: 3002 User Info: { DVTErrorCreationDateKey = "2024-04-12 13:00:55 +0000"; IDERunOperationFailingWorker = IDEInstallCoreDeviceWorker; NSURL = "file:///Users/Username/Library/Developer/Xcode/DerivedData/project-dwlcjztonmnjygafwwnxdjtbzkwe/Build/Products/Debug-iphoneos/target.app/"; } -- Failed to install the app on the device. Domain: com.apple.dt.CoreDeviceError Code: 3002 User Info: { IDERunOperationFailingWorker = IDEInstallCoreDeviceWorker; NSURL = "file:///Users/Username/Library/Developer/Xcode/DerivedData/project-dwlcjztonmnjygafwwnxdjtbzkwe/Build/Products/Debug-iphoneos/target.app/"; } -- The item at target.app is not a valid bundle. Domain: com.apple.dt.CoreDeviceError Code: 3000 Failure Reason: The path to the provided bundle's main executable could not be determined. Recovery Suggestion: Ensure that your bundle's Info.plist contains a value for the key CFBundleExecutable. User Info: { NSURL = "file:///Users/Username/Library/Developer/Xcode/DerivedData/project-dwlcjztonmnjygafwwnxdjtbzkwe/Build/Products/Debug-iphoneos/target.app/"; ProvidedBundle = "file:///Users/Username/Library/Developer/Xcode/DerivedData/project-dwlcjztonmnjygafwwnxdjtbzkwe/Build/Products/Debug-iphoneos/target.app/"; } -- Event Metadata: com.apple.dt.IDERunOperationWorkerFinished : { "device_isCoreDevice" = 1; "device_model" = "iPhone12,1"; "device_osBuild" = "17.4.1 (21E236)"; "device_platform" = "com.apple.platform.iphoneos"; "dvt_coredevice_version" = "355.24"; "dvt_mobiledevice_version" = "1643.100.58"; "launchSession_schemeCommand" = Run; "launchSession_state" = 1; "launchSession_targetArch" = arm64; "operation_duration_ms" = 2486; "operation_errorCode" = 3000; "operation_errorDomain" = "com.apple.dt.CoreDeviceError.3002.com.apple.dt.CoreDeviceError"; "operation_errorWorker" = IDEInstallCoreDeviceWorker; "operation_name" = IDERunOperationWorkerGroup; "param_debugger_attachToExtensions" = 0; "param_debugger_attachToXPC" = 1; "param_debugger_type" = 3; "param_destination_isProxy" = 0; "param_destination_platform" = "com.apple.platform.iphoneos"; "param_diag_MainThreadChecker_stopOnIssue" = 0; "param_diag_MallocStackLogging_enableDuringAttach" = 0; "param_diag_MallocStackLogging_enableForXPC" = 1; "param_diag_allowLocationSimulation" = 1; "param_diag_checker_tpc_enable" = 1; "param_diag_gpu_frameCapture_enable" = 0; "param_diag_gpu_shaderValidation_enable" = 0; "param_diag_gpu_validation_enable" = 0; "param_diag_memoryGraphOnResourceException" = 0; "param_diag_queueDebugging_enable" = 1; "param_diag_runtimeProfile_generate" = 0; "param_diag_sanitizer_asan_enable" = 0; "param_diag_sanitizer_tsan_enable" = 0; "param_diag_sanitizer_tsan_stopOnIssue" = 0; "param_diag_sanitizer_ubsan_stopOnIssue" = 0; "param_diag_showNonLocalizedStrings" = 0; "param_diag_viewDebugging_enabled" = 1; "param_diag_viewDebugging_insertDylibOnLaunch" = 1; "param_install_style" = 0; "param_launcher_UID" = 2; "param_launcher_allowDeviceSensorReplayData" = 0; "param_launcher_kind" = 0; "param_launcher_style" = 99; "param_launcher_substyle" = 8192; "param_runnable_appExtensionHostRunMode" = 0; "param_runnable_productType" = "com.apple.product-type.application"; "param_structuredConsoleMode" = 1; "par[tag:am_testing_launchedForTesting" = 0; "param_testing_suppressSimulatorApp" = 0; "param_testing_usingCLI" = 0; "sdk_canonicalName" = "iphoneos17.4"; "sdk_osVersion" = "17.4"; "sdk_variant" = iphoneos; } System Information macOS Version 14.4.1 (Build 23E224) Xcode 15.3 (22618) (Build 15E204a) Timestamp: 2024-04-12T18:30:55+05:30 The project is running on the simulator properly with no errors. But while running on the real device (the iPhone), the build is successful but getting the mentioned issue. Also, while creating the.ipa file, we are getting the error mentioned below. I have tried following thing to resolve the issue but nothing is worked. Clean project and try to run the app on the real device. Disconnect iPhone from Mac On iPhone: Settings &gt; Developer &gt; Clear Trusted Computers Uninstall the application Reconnect iPhone to Mac In Xcode Window &gt; Devices &amp; Simulators You should see your device in the left sidebar Re-pair the device In the project Target -&gt; Build Settings search for: search for Excluded Architectures add arm64 there. Change the archive destination directory to a location on the local SSD (and not an external HDD). Go to settings &gt;&gt; Select Privacy &amp; Security &gt;&gt; Turn developer mode off if on &gt;&gt; Turn developer mode back on an follow instrctions &gt;&gt; The run your app on xcode ` Please help me find the solution. Thank you in advance.

The Drawing fully immersive content using Metal guide describes how to use Metal for visionOS immersive experiences, but seemingly requires swift to bring up the required CompositorLayer. @main struct MyApp: App { var body: some Scene { ImmersiveSpace(id: "MyContent") { CompositorLayer { layerRenderer in let renderThread = Thread { let engine = myEngineCreate(layerRenderer) myEngineRenderLoop(engine) } renderThread.name = "Render Thread" renderThread.start() } } } The ImmersiveSpace scene can presumably be replaced with a call to [UIApplication.sharedApplication activateSceneSessionForRequest:[UISceneSessionActivationRequest requestWithRole:UISceneSessionRoleImmersiveSpaceApplication] errorHandler:nil] But is there a replacement for CompositorLayer? Or some other way to produce a cp_layer_renderer? Perhaps it would be possible to write a small swift helper for this, but given the swift interface for CompositorLayer how would that be tied to an existing UIScene as created above? @available(visionOS 1.0, *) public struct CompositorLayer : SwiftUI.ImmersiveSpaceContent { public init(configuration: any _CompositorServices_SwiftUI.CompositorLayerConfiguration = .default, renderer: @escaping (CompositorServices.LayerRenderer) -> Swift.Void) public var body: Swift.Never { get } public typealias Body = Swift.Never }

I have created a custom input field by conforming to UITextInput. It is setup to use UITextInteraction. Everything works very well. If the user taps on the custom field, the cursor (provided by UITextInteraction) appears. The user can type, select, move the cursor, etc. But I'm stumped trying to get the cursor to appear automatically. With a normal UITextField or UITextView you simply call becomeFirstResponder(). But doing that with my custom UITextInput does not result in the cursor appearing. It only appears if the user taps on the custom field. I don't know what I'm missing. I don't see any API in UITextInteraction that can be called to say "activate the cursor layer". Does anyone know what steps are required with a custom UITextInput using UITextInteraction to activate the cursor programmatically without the user needing to tap on the custom field?

Hello, I have received 3 almost identical crash reports from the App Store. They all come from the same user, and they are spaced just ± 45 seconds apart. This is the backtrace of the crashed thread: Crashed Thread: 3 Exception Type: EXC_CRASH (SIGABRT) Exception Codes: 0x0000000000000000, 0x0000000000000000 Termination Reason: Namespace SIGNAL, Code 6 Abort trap: 6 Terminating Process: Ssssssss [46033] Thread 3 Crashed: 0 libsystem_kernel.dylib 0x00007ff81b90f196 __pthread_kill + 10 1 libsystem_pthread.dylib 0x00007ff81b946ee6 pthread_kill + 263 (pthread.c:1670) 2 libsystem_c.dylib 0x00007ff81b86dbdf __abort + 139 (abort.c:155) 3 libsystem_c.dylib 0x00007ff81b86db54 abort + 138 (abort.c:126) 4 libc++abi.dylib 0x00007ff81b901282 abort_message + 241 5 libc++abi.dylib 0x00007ff81b8f33fb demangling_terminate_handler() + 267 6 libobjc.A.dylib 0x00007ff81b5c67ca _objc_terminate() + 96 (objc-exception.mm:498) 7 libc++abi.dylib 0x00007ff81b9006db std::__terminate(void (*)()) + 6 8 libc++abi.dylib 0x00007ff81b900696 std::terminate() + 54 9 libdispatch.dylib 0x00007ff81b7a6047 _dispatch_client_callout + 28 (object.m:563) 10 libdispatch.dylib 0x00007ff81b7a87c4 _dispatch_queue_override_invoke + 800 (queue.c:4882) 11 libdispatch.dylib 0x00007ff81b7b5fa2 _dispatch_root_queue_drain + 343 (queue.c:7051) 12 libdispatch.dylib 0x00007ff81b7b6768 _dispatch_worker_thread2 + 170 (queue.c:7119) 13 libsystem_pthread.dylib 0x00007ff81b943c0f _pthread_wqthread + 257 (pthread.c:2631) 14 libsystem_pthread.dylib 0x00007ff81b942bbf start_wqthread + 15 (:-1) In the backtrace of the main thread, I can see that the error is caught by the app delegate which tries to display an alert, but obviously the message has no time to appear. Incidentally (but it's not my main question), I would like to know if it would be possible in such a case to block the background thread for the time the alert is displayed (e.g. using a dispatch queue)? ... (many other related lines) 72 SSUuuuIIIIIIIIIUUuuuu 0x000000010e8089f2 +[NSAlert(Ssssssss) fatalError:] + 32 73 Ssssssss 0x000000010dd5e75b __universalExceptionHandler_block_invoke (in Ssssssss) (SQAppDelegate.m:421) + 333659 74 libdispatch.dylib 0x00007ff81b7a4d91 _dispatch_call_block_and_release + 12 (init.c:1518) 75 libdispatch.dylib 0x00007ff81b7a6033 _dispatch_client_callout + 8 (object.m:560) 76 libdispatch.dylib 0x00007ff81b7b2fcf _dispatch_main_queue_drain + 954 (queue.c:7794) 77 libdispatch.dylib 0x00007ff81b7b2c07 _dispatch_main_queue_callback_4CF + 31 (queue.c:7954) 78 CoreFoundation 0x00007ff81ba62195 __CFRUNLOOP_IS_SERVICING_THE_MAIN_DISPATCH_QUEUE__ + 9 (CFRunLoop.c:1780) 79 CoreFoundation 0x00007ff81ba21ebf __CFRunLoopRun + 2452 (CFRunLoop.c:3147) 80 CoreFoundation 0x00007ff81ba20ec1 CFRunLoopRunSpecific + 560 (CFRunLoop.c:3418) 81 HIToolbox 0x00007ff8254a5f3d RunCurrentEventLoopInMode + 292 (EventLoop.c:455) 82 HIToolbox 0x00007ff8254a5d4e ReceiveNextEventCommon + 657 (EventBlocking.c:384) 83 HIToolbox 0x00007ff8254a5aa8 _BlockUntilNextEventMatchingListInModeWithFilter + 64 (EventBlocking.c:171) 84 AppKit 0x00007ff81eabfb18 _DPSNextEvent + 858 (CGDPSReplacement.m:818) 85 AppKit 0x00007ff81eabe9c2 -[NSApplication(NSEvent) _nextEventMatchingEventMask:untilDate:inMode:dequeue:] + 1214 (appEventRouting.m:407) 86 AppKit 0x00007ff81eab1037 -[NSApplication run] + 586 (NSApplication.m:3432) 87 AppKit 0x00007ff81ea85251 NSApplicationMain + 817 (NSApplication.m:9427) 88 dyld 0x00007ff81b5ec41f start + 1903 (dyldMain.cpp:1165) In all 3 reports, another thread indicates that it is sending or receiving a MIDI data (it's exactly the same backtrace in the 3 reports): Thread 1: 0 libsystem_kernel.dylib 0x00007ff81b908552 mach_msg2_trap + 10 1 libsystem_kernel.dylib 0x00007ff81b9166cd mach_msg2_internal + 78 (mach_msg.c:201) 2 libsystem_kernel.dylib 0x00007ff81b90f584 mach_msg_overwrite + 692 (mach_msg.c:0) 3 libsystem_kernel.dylib 0x00007ff81b90883a mach_msg + 19 (mach_msg.c:323) 4 CoreMIDI 0x00007ff834adfd50 XServerMachPort::ReceiveMessage(int&amp;, void*, int&amp;) + 94 (XMachPort.cpp:62) 5 CoreMIDI 0x00007ff834b118c5 MIDIProcess::MIDIInPortThread::Run() + 105 (MIDIClientLib.cpp:204) 6 CoreMIDI 0x00007ff834af9c44 CADeprecated::XThread::RunHelper(void*) + 10 (XThread.cpp:21) 7 CoreMIDI 0x00007ff834afae9f CADeprecated::CAPThread::Entry(CADeprecated::CAPThread*) + 77 (CAPThread.cpp:324) 8 libsystem_pthread.dylib 0x00007ff81b9471d3 _pthread_start + 125 (pthread.c:893) 9 libsystem_pthread.dylib 0x00007ff81b942bd3 thread_start + 15 (:-1) I wonder if this MIDI activity may be related to the crash, even if it doesn't occur in the crashed thread. I also wonder if the dispatch block starting the backtrace of the thread 3 is the same that leads to the thread 1 (to open the NSAlert), which would mean that it's after the error, or if it's a dispatch block into which the error occurs. Finally, 2024-03-25_13-04-40.6314.crash I wonder if std::terminate() could indicate a problem in C++ codes because I have some part of the application written in C++, and it would be a clue. More generally, is it something in these backtraces that can help me to find what's the problem ? Any help greatly appreciated, thanks! -dp

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