iOS 13: Searchbar crashing when cancel is hit repeatedly - ios

Question

I'm getting a crash when users click the cancel button repeatedly:
Terminating app due to uncaught exception 'NSInternalInconsistencyException', reason: 'Nested internal _UISearchBar transitions not yet supported. This is an internal UIKit bug.'
Steps:
Launch a window with the search bar showing.
Make the search bar text field the first responder. I have the cancel button enabled, so it shows up.
Tap on the location of the cancel button a few times.
Watch the app crash.
Log:
*** First throw call stack:
(
0 CoreFoundation 0x00007fff23b98bde __exceptionPreprocess + 350
1 libobjc.A.dylib 0x00007fff503b5b20 objc_exception_throw + 48
2 CoreFoundation 0x00007fff23b98958 +[NSException raise:format:arguments:] + 88
3 Foundation 0x00007fff255eb6f5 -[NSAssertionHandler handleFailureInMethod:object:file:lineNumber:description:] + 191
4 UIKitCore 0x00007fff468697ba -[_UISearchBarVisualProviderIOS prepareForTransitionToSearchLayoutState:] + 1306
5 UIKitCore 0x00007fff46869174 -[_UISearchBarVisualProviderIOS driveTransitionToSearchLayoutState:] + 180
6 UIKitCore 0x00007fff471c046a __68-[_UISearchControllerTransplantSearchBarAnimator animateTransition:]_block_invoke.98 + 107
7 UIKitCore 0x00007fff4762a1e6 +[UIView(UIViewAnimationWithBlocks) _setupAnimationWithDuration:delay:view:options:factory:animations:start:animationStateGenerator:completion:] + 528
8 UIKitCore 0x00007fff4762a795 +[UIView(UIViewAnimationWithBlocks) animateWithDuration:delay:options:animations:completion:] + 99
9 UIKitCore 0x00007fff471bfc15 -[_UISearchControllerTransplantSearchBarAnimator animateTransition:] + 862
10 UIKitCore 0x00007fff46b2c49e ___UIViewControllerTransitioningRunCustomTransition_block_invoke_2 + 54
11 UIKitCore 0x00007fff46c41ece +[UIInputResponderController _pinInputViewsForInputResponderController:onBehalfOfResponder:duringBlock:] + 99
12 UIKitCore 0x00007fff46b2c432 ___UIViewControllerTransitioningRunCustomTransition_block_invoke.645 + 180
13 UIKitCore 0x00007fff47628751 +[UIView(Animation) _setAlongsideAnimations:toRunByEndOfBlock:] + 175
14 UIKitCore 0x00007fff46b2c2b8 _UIViewControllerTransitioningRunCustomTransition + 553
15 UIKitCore 0x00007fff46a0fccb __56-[UIPresentationController runTransitionForCurrentState]_block_invoke.452 + 2632
16 UIKitCore 0x00007fff4716b85a _runAfterCACommitDeferredBlocks + 352
17 UIKitCore 0x00007fff4715c63c _cleanUpAfterCAFlushAndRunDeferredBlocks + 248
18 UIKitCore 0x00007fff4718bc6e _afterCACommitHandler + 85
19 CoreFoundation 0x00007fff23afaeb7 __CFRUNLOOP_IS_CALLING_OUT_TO_AN_OBSERVER_CALLBACK_FUNCTION__ + 23
20 CoreFoundation 0x00007fff23af594e __CFRunLoopDoObservers + 430
21 CoreFoundation 0x00007fff23af5fca __CFRunLoopRun + 1514
22 CoreFoundation 0x00007fff23af56b6 CFRunLoopRunSpecific + 438
23 GraphicsServices 0x00007fff3815cbb0 GSEventRunModal + 65
24 UIKitCore 0x00007fff47162a67 UIApplicationMain + 1621
25 Properly 0x000000010d3426d2 main + 80
26 libdyld.dylib 0x00007fff5123bcf5 start + 1
27 ??? 0x0000000000000001 0x0 + 1
)
libc++abi.dylib: terminating with uncaught exception of type NSException

Answer 1

Simple solution could be disable cancel button upon tapping once. And then perform the operation under it and when process gets completed you can enable it if you want.

Answer 2

find the below fix for this issue.
var isSeachBarAnimationCompleted: Bool = false
func didPresentSearchController(_ searchController: UISearchController) {
DispatchQueue.main.async(execute:
{
self.isSeachBarAnimationCompleted = true
searchController.searchBar.becomeFirstResponder()
})
}
func searchBarCancelButtonClicked(_ searchBar: UISearchBar)
{
guard self.isSeachBarAnimationCompleted else
{
return
}
self.isSeachBarAnimationCompleted = false
//Do you code here...
}
Hope this will resolve the issue.