Why is my app crashing on iOS 12 ?

I've created a new xcode project in Xcode 11, I've removed the scene delegate from the info plist and replaced the app delegate methods with some from Xcode 10 .When I run the project in the iOS 13 simulator the app work completly fine, but when I run it on an older iPhone on iOS 12.4 the app crashes and I get this in the log

Terminating app due to uncaught exception 'NSUnknownKeyException', reason: '[<UINavigationBar 0x143d13aa0> valueForUndefinedKey:]: this class is not key value coding-compliant for the key ibShadowedLargeTitleTextAttributes.'

*** First throw call stack:

(0x238e8a98c 0x2380639f8 0x238da7e10 0x2398738fc 0x2397e7e1c 0x2398051a4 0x265454384 0x265454a3c 0x265455970 0x265454b74 0x2651ea590 0x2651ea6e0 0x265c2cfc4 0x23d3c7c60 0x23d3ccc08 0x23d32f3e4 0x23d35d620 0x2657ae85c 0x238e1c578 0x238e1be7c 0x238e16ee0 0x238e167c0 0x23b01779c 0x265795c38 0x100181b4c 0x2388da8e0)

libc++abi.dylib: terminating with uncaught exception of type NSException


How should I solve this ?

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Dave19
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Could you show the code and tell exactly where it crashes ? Show the crash log as well.


Have a look here, could be a named color issue

Try removing the named colors (if any) in the navigation bar

https://stackoverflow.com/questions/49833678/xcode-error-this-class-is-not-key-value-coding-compliant-for-the-key-ibshado


Note: normally, no need to remove the scene delegate.


If you have the func present in AppDelegate, iOS will select them when no scene delegate (iOS 12)

Posted by
Claude31
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Thanks solved my problem

Posted by
Dave09
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How did you fixed this problem?

I'm too having the same issue for a single View controller

Posted by
S A R
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I'm too having the same issue for a single View controller

It’s unlikely that Dave19’s experience will help you much here. That’s because this is a very generic error symptom, with lots of different potential causes.

My advice is that you start a new thread that covers your specific case. Please:

  • Tag it with Debugger so that I see it.

  • Include a full Apple crash report. Use the text attachment feature (the paperclip icon) to avoid clogging up the timeline.

Share and Enjoy
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eskimo
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