App crashes on iOS 14 GM (and beta versions) for EKCalendarChooser

When I try to present EKCalendarChooser to display the calendars, the app crashes every time inside EventKit framework after the latest iOS 14 update. I was seeing this crash in Beta version and was hoping this would be fixed in iOS 14 GM but still the crash seems to be present.

The below is a simple code to present EKCalendarChooser. I have tried subclassing as well both the approaches work in iOS 13 and below and crashes in iOS 14 only -

Code Block 
let store = EKEventStore()
store.requestAccess(to: .reminder) { success, error in
    DispatchQueue.main.async {
        let chooser = EKCalendarChooser(selectionStyle: .multiple, displayStyle: .allCalendars, entityType: .reminder, eventStore: store)
        self.present(chooser, animated: true, completion: nil)
    }
}


The below is the crash report for the same in iOS 14 -

  • Terminating app due to uncaught exception 'NSUnknownKeyException', reason: '[<EKFrozenReminderCalendar 0x600003724960> valueForUndefinedKey:]: this class is not key value coding-compliant for the key publishURL.'

* First throw call stack:

(

0   CoreFoundation                      0x000000010d35a4b2 _exceptionPreprocess + 242

1   libobjc.A.dylib                     0x000000010b3cd26e objcexceptionthrow + 48

2   CoreFoundation                      0x000000010d35a153 -[NSException init] + 0

3   Foundation                          0x000000010aebfad8 -[NSObject(NSKeyValueCoding) valueForUndefinedKey:] + 225

4   Foundation                          0x000000010aebe86e -[NSObject(NSKeyValueCoding) valueForKey:] + 317

5   EventKit                            0x000000010b4d6042 -[EKObject(Shared) singleChangedValueForKey:] + 457

6   EventKit                            0x000000010b4e4e84 -[EKCalendar publishURL] + 44

7   EventKitUI                          0x000000010b707e4b -[EKCalendarInfo isPublished] + 23

8   EventKitUI                          0x000000010b829ee7 -[EKCalendarChooser tableView:cellForRowAtIndexPath:] + 1342

9   UIKitCore                           0x000000011f5b1e6a -[UITableView createPreparedCellForGlobalRow:withIndexPath:willDisplay:] + 866

10  UIKitCore                           0x000000011f57b80c -[UITableView updateVisibleCellsNow:] + 2971

11  UIKitCore                           0x000000011f59b52b -[UITableView layoutSubviews] + 194

12  UIKitCore                           0x000000011f8d6269 -[UIView(CALayerDelegate) layoutSublayersOfLayer:] + 2465

13  QuartzCore                          0x000000011a225357 -[CALayer layoutSublayers] + 258

14  QuartzCore                          0x000000011a22b809 ZN2CA5Layer16layoutifneededEPNS11TransactionE + 575

15  UIKitCore                           0x000000011f8c1c39 -[UIView(Hierarchy) layoutBelowIfNeeded] + 573

16  UIKitCore                           0x000000011eb54703 -[UISheetPresentationController sheetLayoutInfoLayout:] + 48

17  UIKitCore                           0x000000011eb51850 -[UISheetLayoutInfo layout] + 360

18  UIKitCore                           0x000000011eb56580 54-[UISheetPresentationController transitionWillBegin:]blockinvoke2 + 52

19  UIKitCore                           0x000000011f8c90c9 +[UIView(Animation) performWithoutAnimation:] + 84

20  UIKitCore                           0x000000011eb564bd 54-[UISheetPresentationController transitionWillBegin:]blockinvoke.358 + 120

21  UIKitCore                           0x000000011ec8fc82 -[UIViewControllerTransitionCoordinator applyBlocks:releaseBlocks:] + 294

22  UIKitCore                           0x000000011ec8c13d -[UIViewControllerTransitionContext runAlongsideAnimations] + 263

23  UIKitCore                           0x000000011f8c8ef2 63+[UIView(Animation) setAlongsideAnimations:toRunByEndOfBlock:]blockinvoke + 16

24  UIKitCore                           0x000000011f89aa94 -[UIViewAnimationState _runAlongsideAnimations] + 24

25  UIKitCore                           0x000000011f899897 -[UIViewAnimationState pop] + 37


Also, the crash happens only when entityType is reminder. It works fine for event.

Can someone please help me with any workaround for this, since calendar selection is the main feature within our app.
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varunpm
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Also, the crash happens only when entityType is reminder. It works fine for event.
Posted by
varunpm
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Yes we are seeing the same issue.

I had reported this to Apple about 3 beta versions ago and still no fix in the GM.

P.S.
Nice for developers to get a massive 24 hours with the GM before iOS 14 gets released to the general public!!!!
Absolutely no time for final testing and getting iOS 14 built updates through app review!!!!!!!!!!!!!!
There aren't going to be any new style Widgets for iOS 14 people to set up (other than Apple native ones).
Have Apple thought this one through properly...
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Steve T
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I had reported this to Apple about 3 beta versions ago and still no
fix in the GM.

What was your bug number?

Share and Enjoy
—
Quinn “The Eskimo!” @ Developer Technical Support @ Apple
let myEmail = "eskimo" + "1" + "@apple.com"
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eskimo
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What was your bug number?

I had also raised a bug for the same in GM seed version. The bug number for GM version is - 8698771
Posted by
varunpm
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The bug number for GM version is - FB8698771

Thanks for that.

It’s possible that you’re hitting a known bug here (r. 67882969). It’s not fixed in the current iOS 14.2 beta so I recommend that you continue to test with 14.2 beta seeds as they are released.

Share and Enjoy
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Quinn “The Eskimo!” @ Developer Technical Support @ Apple
let myEmail = "eskimo" + "1" + "@apple.com"
Posted by
eskimo
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  • I know this is a year old....but was there a resolution for this? Looks like this may still be happening in ios 15.2 xcode 13.2.1

    —
    Cai001
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but was there a resolution for this?

The specific bug mentioned above (r. 67882969) was reported as fixed in iOS 14.2. Of course there’s no guarantee that the patch stuck, or that the problem you’re seeing is exactly the same issue.

Looks like this may still be happening in ios 15.2 xcode 13.2.1

Please post an Apple crash report of the problem. See Posting a Crash Report for hints and tips on how to do that.

Share and Enjoy
—
Quinn “The Eskimo!” @ Developer Technical Support @ Apple
let myEmail = "eskimo" + "1" + "@" + "apple.com"

Posted by
eskimo
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