[iOS] LargeTitles deferred loading until user interacted with content

[paulober]

Description

If I have all elements that aren't layouts conditional IsVisible and they are hidden when the page starts loading then the title isn't rendered even if you then make for example the collection view visible once content loaded.
I'm not sure what it is related to but maybe the title needs a special view update once the collection view is visible to render again and this is for some reason not triggered when making the collection view with content visible only if the user interacts with it....
See for your self in the provided min repr. example.

Steps to Reproduce

See minimal repr. example.

Link to public reproduction project repository

https://github.com/paulober/maui-largetitles-bug

Version with bug

10.0.11

Is this a regression from previous behavior?

Not sure, did not test other versions

Last version that worked well

No response

Affected platforms

iOS

Affected platform versions

iOS 26.0, 26.1 and maybe more that support Large Titles

Did you find any workaround?

By placing any constant visible content above the CollectionView. In my example if I place one bellow it than it will stop you from being able to scroll it anymore so there is then no option for the user to make the title visible.

<Grid SafeAreaEdges="SoftInput">
     <Label Text="Nice"/>
 </Grid>

Relevant log output

[jfversluis]

@kubaflo you did some work around this... Rings a bell? Or maybe already fixed with one of the merged fixes?

[HarishKumarSF4517]

This issue has been validated in Visual Studio Code 1.107.0 with MAUI versions (10.0.0-preview.7, 10.0.0, 10.0.11 & 10.0.0-rc.2). It was reproducible on iOS26 platform.
Note: This issue was not reproducible in iOS 18.0

iOS 18.0	iOS 26.0
Screen.Recording.2025-12-12.at.7.31.11.PM.mov	Screen.Recording.2025-12-12.at.7.37.18.PM.mov

[kubaflo]

Hi @paulober
Would you mind testing a build from this PR?

#32081

We’ve added a support for shell for large titles, so the workaround in your custom AppShell should no longer be necessary

https://github.com/paulober/maui-largetitles-bug/blob/243daf48b14dd9a73514d41c1e1a0a33f2dca85b/Platforms/iOS/CustomAppShell.cs#L8C2-L11C6

    protected override IShellNavBarAppearanceTracker CreateNavBarAppearanceTracker()
    {
        return new LargeTitleNavBarAppearanceTracker();
    }

[paulober]

@kubaflo I tried updating the linked repo to the PR way of adding large titles to shell apps but I did not succeed. How should it work to make a maui shell app use large titles on iOS 26?

[kubaflo]

@paulober try to do it as I did in the UI test in this PR: https://github.com/dotnet/maui/pull/32081/files#diff-60aad23b36b94285b4e12185ad208e7e31b925451f7cc3fa822e7b861c7913d4

[paulober]

@kubaflo I tried adding it to the shellcontent in my shell. Did not notice that you declared the ContentPage in place. It works now though it doesn't get rid of the ugly hairline under the large title. Though I'm confused why the custom implementation did have the issue and this PR doesn't...