[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

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

#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

[taublast]

Archive.zip
please find attached.

It's changing the size only of the selected item for me on ios simulator, forms 5.0.0.2083, can't see a problem..

[taublast]

@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

Same, on ios simulator, forms 5.0.0.2083, can't see a problem. For info all repro were using forms 4.8.