Our app crashes when compiled with the iOS 27 beta 3 SDK and run as an iOS app on Mac, on both macOS 26 and macOS 27, as soon as a UISearchBar receives focus.
The crash is due to this exception:
*** Assertion failure in BOOL _screenBasedFocusUnsupported(void)(), UIScreen.m:3.725
Accessing the focus system through UIScreen is no longer supported.
(
0 CoreFoundation 0x000000018bea31c0 __exceptionPreprocess + 176
1 libobjc.A.dylib 0x000000018b91e91c objc_exception_throw + 88
2 Foundation 0x000000018e092644 -[NSMutableDictionary(NSMutableDictionary) initWithContentsOfFile:] + 0
3 UIKitCore 0x00000001c5dae8ec _screenBasedFocusUnsupported + 272
4 UIKitCore 0x00000001c5dae960 -[UIScreen _preferredFocusedWindow] + 24
5 UIKitCore 0x00000001c4ea3a60 -[UIScreen _mainSceneReferenceBounds] + 200
6 UIKitCore 0x00000001c4ea3914 -[UIScreen _mainSceneBoundsForInterfaceOrientation:] + 40
7 UIKitCore 0x00000001c5708134 +[UINavigationBar defaultSizeForOrientation:] + 76
8 UIKitCore 0x00000001c6222c88 -[_UISearchPresentationController _layoutPresentationWithSize:transitionCoordinator:] + 704
9 UIKitCore 0x00000001c622296c -[_UISearchPresentationController containerViewWillLayoutSubviews] + 84
10 UIKitCore 0x00000001c549304c block_destroy_helper.13 + 25112
11 UIKitCore 0x00000001c549344c block_destroy_helper.13 + 26136
12 UIKitCore 0x00000001c4ea26a8 -[UIView(CALayerDelegate) layoutSublayersOfLayer:] + 1648
13 QuartzCore 0x0000000196103dbc _ZN2CA5Layer15perform_update_EPS0_P7CALayerjNS_17LayerUpdateReasonEPNS_11TransactionE + 460
14 QuartzCore 0x000000019610390c _ZN2CA5Layer17update_if_needed_EPNS_11TransactionENS_17LayerUpdateReasonE + 692
15 QuartzCore 0x0000000196035d2c _ZN2CA7Context18commit_transactionEPNS_11TransactionEdPd + 608
16 QuartzCore 0x0000000195e69520 _ZN2CA11Transaction6commitEv + 652
17 AppKit 0x0000000190fe116c __37+[NSDisplayCycle currentDisplayCycle]_block_invoke.7 + 44
18 CoreFoundation 0x000000018be34ad0 __CFRUNLOOP_IS_CALLING_OUT_TO_A_BLOCK__ + 28
19 CoreFoundation 0x000000018be34a10 __CFRunLoopDoBlocks + 396
20 CoreFoundation 0x000000018be33e54 __CFRunLoopRun + 2356
21 CoreFoundation 0x000000018bf06234 _CFRunLoopRunSpecificWithOptions + 532
22 HIToolbox 0x0000000198c1f560 RunCurrentEventLoopInMode + 320
23 HIToolbox 0x0000000198c228bc ReceiveNextEventCommon + 488
24 HIToolbox 0x0000000198dac14c _BlockUntilNextEventMatchingListInMode + 48
25 AppKit 0x00000001909163d0 _DPSBlockUntilNextEventMatchingListInMode + 228
26 AppKit 0x000000019026a084 _DPSNextEvent + 576
27 AppKit 0x0000000190dff96c -[NSApplication(NSEventRouting) _nextEventMatchingEventMask:untilDate:inMode:dequeue:] + 688
28 AppKit 0x0000000190dff678 -[NSApplication(NSEventRouting) nextEventMatchingMask:untilDate:inMode:dequeue:] + 72
29 AppKit 0x000000019025d13c -[NSApplication run] + 368
30 AppKit 0x00000001902357b0 NSApplicationMain + 880
31 AppKit 0x000000019047c958 +[NSWindow _savedFrameFromString:] + 0
32 UIKitMacHelper 0x00000001aa2651bc UINSApplicationMain + 972
33 UIKitCore 0x00000001c4e1aed4 UIApplicationMain + 144
34 UIKitCore 0x00000001c548bda0 block_destroy_helper.31 + 8880
35 DigitalConcertHall.debug.dylib 0x0000000106e41bd8 $sSo21UIApplicationDelegateP5UIKitE4mainyyFZ + 128
36 DigitalConcertHall.debug.dylib 0x0000000106e41b4c $s18DigitalConcertHall11AppDelegateC5$mainyyFZ + 32
37 DigitalConcertHall.debug.dylib 0x0000000106e4afc0 __debug_main_executable_dylib_entry_point + 28
38 dyld 0x000000018b9ac4e4 start + 6992
)
I could not test with the iOS 27 beta 4 SDK due to this blocking issue: https://developer.apple.com/forums/thread/839012
However, when I tried to set up a simple sample project, I could not reproduce the issue.
Does anybody know what might be causing this?
I filed feedback FB24201508