Xamarin.forms: [Bug] CollectionView Dynamic resizing of items not working properly on Xamarin Forms IOS

[eyacoub]

Description

on Item tapped in the collection view, we are changing the visibility of a layout. it's working fine on Android while on IOS it's changing the size of all the items below the one tapped.

Steps to Reproduce

1. 
   
   
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Expected Behavior

it should only change the size of the tapped item

Actual Behavior

it's changing the size of all the items below the one selected.

Basic Information

• Version with issue: Xamarin.Forms 4.3.0.991211
• Last known good version:None
• IDE:Visual Studio For MAc and For Windows
• Platform Target Frameworks:
  
  
  
  • iOS:
  
  
  • Android:
  
  

Screenshots

[samhouts]

@eyacoub Can you please attach a small project that demonstrates this issue? Thanks!

[eyacoub]

Archive.zip
please find attached.

[PureWeen]

Possibly related

https://github.com/xamarin/Xamarin.Forms/issues/6852

[NiknakSi]

Any news on when this might get resolved? Or if there's a workaround for the time being? It seems to fix itself when the CollectionView gets scrolled.

[bondarenkod]

I've updated nugets and templates in the example from the top of this thread
I've also added fixes from the #10842
It seems like solved the issue.
[updated example TestCollectionViewExpandable.iOS.zip] (https://github.com/xamarin/Xamarin.Forms/files/5015794/TestCollectionViewExpandable.iOS.zip)

[lafritay]

@samhouts In case it helps, here's another repro that doesn't even require user interaction. It's just a simple form that is barely changed from the sample that comes with a new project.

When it first loads, it looks like this (notice the extra space after the third item):

If you scroll down and then back up, it fixes itself:

Here's the repro:

Bugs 2.zip