Xamarin.forms: [Bug] [iOS] Horizontal Collection View Item Spacing Hiding Items

[paul-charlton]

Description

When using a horizontal orientated collection view with an item spacing then some items are hidden.

Steps to Reproduce

1. Use Xaml below, AList is a string[6]
2. Run, 3 items are shown

3. Remove ItemSpacing, rerun and 6 items are shown

           <CollectionView ItemsSource="{Binding AList}">
   
               <CollectionView.ItemsLayout>
                   <ListItemsLayout ItemSpacing="15" Orientation="Horizontal" />
               </CollectionView.ItemsLayout>
   
               <CollectionView.ItemTemplate>
                   <DataTemplate>
   
                       <Label Text="O" TextColor="Blue" />
   
                   </DataTemplate>
               </CollectionView.ItemTemplate>
   
           </CollectionView>
   

Expected Behavior

6 items always shown

Actual Behavior

only 3 shown (changing the items spacing effects the number of items)

Basic Information

• Version with issue:
  4.2.0.815419
• Last known good version: unknown
• IDE:
• Platform Target Frameworks:
  
  
  
  • iOS: 12.4
  
  
  • Android: not tested
  
  
  • UWP: not tested
  
  
• Android Support Library Version: not tested
• Nuget Packages: n/a
• Affected Devices:
  iOS 6s Simulator

Screenshots

will provide if needed

Reproduction Link

will provide if needed

[adrianknight89]

@paul-charlton It'd be easier for the team if you could attach a repro.

[StephaneDelcroix]

Reproduction Link

will provide if needed

most definitely needed

[StephaneDelcroix]

/cc @hartez @rmarinho

[paul-charlton]

there's a branch here that shows the problem. The top collection view only shows 3 items, the second one (which is working) shows 6.

https://github.com/paul-charlton/IssueSandbox/tree/XF_7605

[paul-charlton]

the same issue seems to occur if you use a gridlayout with spacing as well:
<GridItemsLayout HorizontalItemSpacing="15" Orientation="Horizontal" Span="1" />

[PureWeen]

possibly related
https://github.com/xamarin/Xamarin.Forms/issues/7309

[winterdouglas]

Facing this issue here in my horizontal list with item spacing. If I remove the spacing that works nicely.

[AbdellahOusrhireDev]

I'm facing this issue as well, removing the ItemSpacing fixes it

[winterdouglas]

Any updates on this one?

[activa]

This is still an issue. Can this get some love please?