My app uses PDFKit, but I don't know how to solve this bug at all. Under the same IOS system and device model, some users' devices may experience crashes, while our own devices are functioning normally. The following is the stack information for crashing: 0 libsystem_platform.dylib__os_unfair_lock_recursive_abort + 36 1 libsystem_platform.dylib__os_unfair_lock_lock_slow + 308 2 CoreGraphics_CGPDFPageCopyRootTaggedNode + 56 3 PDFKit-[PDFPageViewAccessibility accessibilityElements] + 76 4 UIAccessibility-[NSObject(AXPrivCategory) _accessibilityElements] + 56 5 UIAccessibility-[NSObjectAccessibility accessibilityElementCount] + 68 6 UIAccessibility-[NSObject(AXPrivCategory) _accessibilityHasOrderedChildren] + 44 7 UIAccessibility-[NSObject(AXPrivCategory) _accessibilityFrameForSorting] + 216 8 UIAccessibility-[NSObject _accessibilityCompareGeometry:] + 116 9 UIAccessibility-[NSObject(AXPrivCategory) accessibilityCompareGeometry:] + 52 10 CoreFoundation___CFSimpleMergeSort + 100 11 CoreFoundation___CFSimpleMergeSort + 248 12 CoreFoundation_CFSortIndexes + 260 13 CoreFoundation-[NSArray sortedArrayFromRange:options:usingComparator:] + 732 14 CoreFoundation-[NSMutableArray sortedArrayFromRange:options:usingComparator:] + 60 15 CoreFoundation-[NSArray sortedArrayUsingSelector:] + 168 16 UIAccessibility___57-[NSObject(AXPrivCategory) _accessibilityFindDescendant:]_block_invoke + 268 17 UIAccessibility___96-[NSObject(AXPrivCategory) _accessibilityEnumerateAXDescendants:passingTest:byYieldingElements:]_block_invoke + 140 18 UIAccessibility-[NSObject _accessibilityEnumerateAXDescendants:passingTest:byYieldingElements:] + 244 19 UIAccessibility-[NSObject _accessibilityFindFirstAXDescendantPassingTest:byYieldingElements:] + 272 20 UIAccessibility-[NSObject(AXPrivCategory) _accessibilityFindDescendant:] + 100 21 UIAccessibility__axuiElementForNotificationData + 276 22 UIAccessibility__massageAssociatedElementBeforePost + 36 23 UIAccessibility__UIAXBroadcastMainThread + 292 24 libdispatch.dylib__dispatch_call_block_and_release + 32 25 libdispatch.dylib__dispatch_client_callout + 20 26 libdispatch.dylib__dispatch_main_queue_drain + 980 27 libdispatch.dylib__dispatch_main_queue_callback_4CF + 44 28 CoreFoundation___CFRUNLOOP_IS_SERVICING_THE_MAIN_DISPATCH_QUEUE__ + 16 29 CoreFoundation___CFRunLoopRun + 1996 30 CoreFoundation_CFRunLoopRunSpecific + 572 31 GraphicsServices_GSEventRunModal + 164 32 UIKitCore-[UIApplication _run] + 816 33 UIKitCore_UIApplicationMain + 340 34 SwiftUIclosure #1 (Swift.UnsafeMutablePointer<Swift.UnsafeMutablePointer<Swift.Int8>?>) -> Swift.Never in SwiftUI.(KitRendererCommon in _ACC2C5639A7D76F611E170E831FCA491)(Swift.AnyObject.Type) -> Swift.Never + 168 35 SwiftUI SwiftUI.runApp(A) -> Swift.Never + 100 36 SwiftUI static (extension in SwiftUI):SwiftUI.App.main() -> () + 180

I got a UIControl, and I want to make it behavior like a custom UIAccessibilityElement. UIControl *control = [[UIControl alloc] init]; control.isAccessibilityElement = NO; CustomAccessibilityElement *elem = [[CustomAccessibilityElement alloc] initWithAccessibilityContainer:control]; elem.isAccessibilityElement = YES; // some custom setting here control.accessibilityElements = @[elem]; It worked well with an iPhone 13, iOS 15.5.1, but crashed with an iPhone SE, iOS 15.4.1 and the crash msg is : "-[UIAccessibilityElement _addAccessibilityElementsAndOrderedContainersWithOptions:toCollection:]: unrecognized selector sent to instance 0x283b7c680" Can you tell me the reason ? Thanks a lot.

I have an issue while unlocking the app from Single App mode. Device Dock is popping up on top of my app and this is disturbing the experience of my app. I have already done MDM configuration and the indented functionality is working fine with the below code, the app is successfully switching to single app mode and back. The sample code below reproduces the issue. Tap on Lock, the completion blocks returns true and the app is successfully switched to single app mode. Tap on Unlock, the completion block returns true and the app is successfully switched from the single app mode. Now the device dock is popped up on top of the app. struct LockApp: App { var body: some Scene { WindowGroup { VStack { Button("Lock", systemImage: "lock") { UIAccessibility.requestGuidedAccessSession(enabled: true) { success in print("App has been locked", success) } } .buttonStyle(.borderedProminent) Button("UnLock", systemImage: "lock.open") { UIAccessibility.requestGuidedAccessSession(enabled: false) { success in print("App has been unlocked", success) } } .buttonStyle(.borderedProminent) } } } } Xcode Version: 16.0 Device: iPad Pro 12.9 inch 6th gen. OS: 18.1 Is this intended behaviour? Has anyone come across this issue?