[Bug] - XF 5 CarouselView PeekAreaInsets crashing

[Pandu-V]

Description

Steps to Reproduce

1. We are using CarouselView with PeekAreaInsets
2. When we remove PeekAreaInsets there is no crash, but we add PeekAreaInsets with any thickness its getting crashed
   .

Expected Behavior

CarouselView with PeekAreaInsets should work

Actual Behavior

Crashing while using PeekAreaInsets in CarouselView

Basic Information

• Version with issue:
• Last known good version:
• Platform Target Frameworks:
  • iOS:
  • Android:
  • UWP:
• Android Support Library / AndroidX Version:
• NuGet Packages:
• Affected Devices:

Environment

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Build Logs

Screenshots

Reproduction Link

Workaround

[rachelkang]

Hi, @Pandu-V - thanks for submitting this issue. I tested with our CarouselView samples, and wasn't able to reproduce the issue. Which version of XF 5 exactly are you experiencing this on? And on which devices/platforms?

[Pandu-V]

Hi Team, I have this issue only on iOS[All phones] when we set PeakAreaInsets property in CarouselView for XF v5.0.0.2.
Thanks,
Pandu

[rachelkang]

Hi, @Pandu-V - would you be able to share a sample? I just tested again on an iOS device, with XF 5.0.0.2, but wasn't able to reproduce any issues

[jsuarezruiz]

Tried but cannot reproduce the issue. Could you attach a small sample?
Issue14555.zip

[DamienDoumer]

I still have this bug in version 5.0.0.7775 of Xamarin Forms

[AdamEssenmacher]

Just hit this myself.

UIKitCore error message is: negative or zero item sizes are not supported in the flow layout

MonoTouchException: Objective-C exception thrown. Name: NSInternalInconsistencyException Reason: negative sizes are not supported in the flow layout.

In my case, I was experiencing this when PeekAreaInsets was set > 0 AND the view was also rotated around the Y-axis, which is common enough in animations.

[softlion]

Maybe linked to #15191

[ac2112]

I'm having a similar problem with the CarouselView. If set PeekAreInsets I get the following failure: *** Assertion failure in -[Xamarin_Forms_Platform_iOS_CarouselViewLayout _getSizingInfosWithExistingSizingDictionary:], UICollectionViewFlowLayout.m:1501

[bbenetskyy]

@ac2112 Facing the same issue with iOS Simulators, fix from #15191 helps to solve as a temporary solution

[grounch]

@rachelkang facing the same issue with XF 5.0.0.2012 only on iOS.
If i start the app and PeekAreInsets is defined (in xaml or code) the app crashes with the errors everyone mention above.
If i start the app and i define PeekAreInsets in runtime, it seems to set it well with HotReload. However, with no surprise, if then i close the app and open it again: crash.

I tried to set it after page load without success.
Not using the feature as @bbenetskyy suggests from this post isn't really a workaround but just closing your eyes on it.

I tried with the CarouselViewDemos sample and it's actually working fine.
The only difference i see with my project is that i retrieve the content of the ObservableCollection from a server, and in the sample it's hardcoded.

It's really annoying as it's a nice UI feature and having it completely crashing the app was not expected..
Could you have a look at the issue? It seems to exist since a long time.

[grounch]

Looks like it's not gonna be handled anytime soon, used collectionview instead it looks similar...