Hang when opening share sheet

Question

Created Sep ’22

Replies 4

Boosts 1

Views 1.8k

Participants 3

When I compile my app with Xcode 14, the app fails to open share sheets. The app just hangs on the call to present( the UIActivityViewController, and eventually crashes with a memory error.

I do not see this behavior when I compile with Xcode 13.4, or if I run the app on an iOS 15 device. It is just when compiled with Xcode 14 and run on an iOS 16 device.

I tried creating a dedicated view controller with nothing other than a button letting the user present a share sheet. I stripped out everything in the view controller and app delegate other than what is needed to show that view controller. I still see the behavior. But I do not see this when I create a standalone app.

I am looking for differences in build settings and Info.plist that might trigger this. Is there something else I should look for?

This is the main thread while the app is hung, before it just crashes:

Thread 1 Queue : com.apple.main-thread (serial)
#0	0x000000019f4f0378 in -[UIButtonLegacyVisualProvider updateConstraints] ()
#1	0x000000019f4f02f8 in -[UIButton updateConstraints] ()
#2	0x000000019f4778bc in -[UIView(AdditionalLayoutSupport) _sendUpdateConstraintsIfNecessaryForSecondPass:] ()
#3	0x000000019f47767c in -[UIView(AdditionalLayoutSupport) _updateConstraintsIfNeededCollectingViews:forSecondPass:] ()
#4	0x000000019f477598 in -[UIView(AdditionalLayoutSupport) _updateConstraintsIfNeededCollectingViews:forSecondPass:] ()
#5	0x00000001b7e685d8 in -[NSISEngine withBehaviors:performModifications:] ()
#6	0x000000019f477378 in __100-[UIView(AdditionalLayoutSupport) _updateConstraintsIfNeededWithViewForVariableChangeNotifications:]_block_invoke ()
#7	0x000000019f41e204 in -[UIView(AdditionalLayoutSupport) _withUnsatisfiableConstraintsLoggingSuspendedIfEngineDelegateExists:] ()
#8	0x000000019f41def4 in -[UIView(AdditionalLayoutSupport) _updateConstraintsIfNeededWithViewForVariableChangeNotifications:] ()
#9	0x000000019f4549ec in -[UIView(AdditionalLayoutSupport) _systemLayoutSizeFittingSize:withHorizontalFittingPriority:verticalFittingPriority:hasIntentionallyCollapsedHeight:] ()
#10	0x000000019f94e6c0 in -[_UIButtonBarItemLayout minimumLayoutWidthGivenMinimumSpaceWidth:] ()
#11	0x000000019f94ed70 in -[_UIButtonBarItemGroupLayout recalculateLayoutWidthsGivenItemSpaceWidth:] ()
#12	0x000000019f9476c0 in -[_UIButtonBar _widthInfoForLayout:] ()
#13	0x000000019f988330 in -[_UINavigationBarContentViewLayout _buttonBarLayoutInfo] ()
#14	0x000000019f98868c in -[_UINavigationBarContentViewLayout layoutSubviews] ()
#15	0x000000019f398414 in -[_UINavigationBarContentView layoutSubviews] ()
#16	0x000000019f395a58 in -[UIView(CALayerDelegate) layoutSublayersOfLayer:] ()
#17	0x000000019e8baa60 in CA::Layer::layout_if_needed(CA::Transaction*) ()
#18	0x000000019f45a94c in -[UIView(Hierarchy) layoutBelowIfNeeded] ()
#19	0x000000019f52595c in -[UINavigationController _positionNavigationBarHidden:edge:initialOffset:] ()
#20	0x000000019f5256a8 in -[UINavigationController _positionNavigationBarHidden:edge:] ()
#21	0x000000019f5254c0 in -[UINavigationController __viewWillLayoutSubviews] ()
#22	0x000000019f5253f4 in -[UILayoutContainerView layoutSubviews] ()
#23	0x000000019f395a58 in -[UIView(CALayerDelegate) layoutSublayersOfLayer:] ()
#24	0x000000019e8baa60 in CA::Layer::layout_if_needed(CA::Transaction*) ()
#25	0x000000019f45a94c in -[UIView(Hierarchy) layoutBelowIfNeeded] ()
#26	0x000000019f45a81c in -[UISheetPresentationController _sheetLayoutInfoLayout:] ()
#27	0x000000019f458600 in -[_UISheetLayoutInfo _layout] ()
#28	0x00000001a015e080 in __54-[UISheetPresentationController _transitionWillBegin:]_block_invoke_3 ()
#29	0x000000019f3c0478 in +[UIView(Animation) performWithoutAnimation:] ()
#30	0x000000019f6c1c08 in __54-[UISheetPresentationController _transitionWillBegin:]_block_invoke_2 ()
#31	0x000000019f6b4af4 in -[_UIViewControllerTransitionCoordinator _applyBlocks:releaseBlocks:] ()
#32	0x000000019f6b49d8 in -[_UIViewControllerTransitionContext __runAlongsideAnimations] ()
#33	0x000000019f6b48e8 in __63+[UIView(Animation) _setAlongsideAnimations:toRunByEndOfBlock:]_block_invoke ()
#34	0x000000019f45a45c in -[UIViewAnimationState _runAlongsideAnimations] ()
#35	0x000000019f459280 in -[UIViewAnimationState pop] ()
#36	0x000000019f458d3c in +[UIViewAnimationState popAnimationState] ()
#37	0x000000019f458b48 in +[UIView _setupAnimationWithDuration:delay:view:options:factory:animations:start:animationStateGenerator:completion:] ()
#38	0x000000019f42ddd4 in +[UIView(UIViewAnimationWithBlocks) animateWithDuration:delay:options:animations:completion:] ()
#39	0x000000019f80554c in __50-[UITransitionView _startTransition:withDuration:]_block_invoke_2 ()
#40	0x000000019f4d212c in +[UIView(UIViewAnimationWithBlocks) conditionallyAnimate:withAnimation:layout:completion:] ()
#41	0x000000019f62b14c in -[UITransitionView _startTransition:withDuration:] ()
#42	0x000000019f628e7c in -[UITransitionView transition:fromView:toView:removeFromView:] ()
#43	0x000000019f628054 in -[UIViewControllerBuiltinTransitionViewAnimator animateTransition:] ()
#44	0x000000019fb199f8 in ___UIViewControllerTransitioningRunCustomTransition_block_invoke_3 ()
#45	0x000000019f57f664 in +[UIKeyboardSceneDelegate _pinInputViewsForKeyboardSceneDelegate:onBehalfOfResponder:duringBlock:] ()
#46	0x000000019f627b40 in ___UIViewControllerTransitioningRunCustomTransition_block_invoke_2 ()
#47	0x000000019f571e9c in +[UIView(Animation) _setAlongsideAnimations:toRunByEndOfBlock:] ()
#48	0x000000019f571d7c in _UIViewControllerTransitioningRunCustomTransition ()
#49	0x000000019fa8e6b8 in __56-[UIPresentationController runTransitionForCurrentState]_block_invoke_3 ()
#50	0x000000019f522f30 in -[_UIAfterCACommitBlock run] ()
#51	0x000000019f522e6c in -[_UIAfterCACommitQueue flush] ()
#52	0x00000001045e808c in _dispatch_call_block_and_release ()
#53	0x00000001045e98c4 in _dispatch_client_callout ()
#54	0x00000001045f8428 in _dispatch_main_queue_drain ()
#55	0x00000001045f8080 in _dispatch_main_queue_callback_4CF ()
#56	0x000000019853cac8 in __CFRUNLOOP_IS_SERVICING_THE_MAIN_DISPATCH_QUEUE__ ()
#57	0x0000000198520754 in __CFRunLoopRun ()
#58	0x0000000198524dfc in CFRunLoopRunSpecific ()
#59	0x00000001d23da984 in GSEventRunModal ()
#60	0x000000019f707e7c in -[UIApplication _run] ()
#61	0x000000019f707af4 in UIApplicationMain ()
#62	0x00000001027e9604 in main at /Users/jbrayton/Documents/Unread/working/App/Unread/Supporting Files/main.m:14
#63	0x00000001b9be2de0 in start ()

Boost

Answer 1

Frameworks Engineer OP

Apple

Sep ’22

What is the reason for the crash as found in the crash report?

0

Answer 2

johnbrayton OP

Sep ’22

The crash report said the reason was running out of memory. The app's memory usage would climb by roughly 30MB/second until the app crashed.

I since figured out the source of the problem. I had an Objective-C extension on UIColor that implemented secondaryLabelColor. I do not know why that had the effect it did on share sheets, but removing that extension method fixed it.

Thank you for replying!

John

0

Answer 3

SeanMcMains OP

Sep ’22

We're seeing something very similar in our app; still trying to run it down.

John, how on earth did you figure out that your UIColor extension was triggering this behavior? :P

0

Answer 4

johnbrayton OP

Sep ’22

After I was still seeing the behavior when just creating an App Delegate, Scene Delegate, and View Controller that did just about nothing else, I deleted all other code in the app. I could then see the problem was gone. I then put a breakpoint in every method with a dispatch_once_t call. That led me to where my code was being called that I did not expect.

I hope this is somehow helpful, @SeanMcMains!

John

0