The .net maui title bar disappears and does not re-appear on iOS when using shell.searchhandler

[Kurt427]

Description

Please see the Microsoft Q&A question I submitted: Why does the .net maui title bar disappear on iOS when using shell.searchhandler?.

Wenyan Zhang (Shanghai Wicresoft Co,.Ltd.) suggested that I should report this issue.

Steps to Reproduce

1. Choose the "About" page using the flyout menu. The title bar with the menu icon and the "About" title is visible.
2. Tap into the search field. The title bar disappears.
3. Type any text into the search field and tap "Search" in the virtual keyboard.
4. An alert box appears with message "AboutSearchHandler.OnQueryConfirmed(): Query: '' IsFocused: 'False'".

So, the query was completed and focus left the search field. However, the title bar is not restored.

NOTE: The code was changed slightly from the version submitted as the Microsoft Q & A question:

1. The alert box in OnQueryConfirmed() appears with message that now shows the state of IsFocused. (Also, for simplicity, the custom ShellUtils static class is not included.)
2. The OnFocused() and OnUnfocus() overrides were added to AboutSearchHandler to confirm that in fact OnUnfocus() is getting called when/after OnQueryConfirmed() is called.

I would have preferred to use the search suggestions feature of Shell.SearchHandler. However, as stated in the comments in AboutSearchHandler.OnQueryChanged, enabling that feature on iOS, at least for me causes .NET Maui to crash. Regardless, it should be possible to use Shell.SearchHandler without search suggestions since there is a "ShowsResults" option.

Link to public reproduction project repository

https://github.com/Kurt427/ShellSearchTest

Version with bug

7.0 (current)

Last version that worked well

Unknown/Other

Affected platforms

iOS

Affected platform versions

Tested on iPhone 11 Pro iOS v15.6.1, and also on iPhone 14 iOS 16.2 simulator.

Did you find any workaround?

No.

Relevant log output

When using iPhone 14 iOS 16.2 simulator, when clicking into search field (not sure if relevant):

2023-04-06 10:00:54.792016-0700 ShellSearchTest[8294:73792] [unspecified] container_query_get_single_result: error = 2→(98) NOT_CODESIGNED
2023-04-06 10:00:54.792312-0700 ShellSearchTest[8294:73792] [unspecified] container_system_group_path_for_identifier: error = ((container_error_t)98) NOT_CODESIGNED
2023-04-06 10:00:54.792608-0700 ShellSearchTest[8294:73792] [MC] Error getting system group container for systemgroup.com.apple.configurationprofiles: 98
2023-04-06 10:00:54.793083-0700 ShellSearchTest[8294:73792] [MC] Failed to get profile system group container path. Overriding with expected path: /Users/kurt/Library/Developer/CoreSimulator/Devices/C72FA5AC-12C8-4F22-98BB-606EDCF98930/data/Containers/Shared/SystemGroup/systemgroup.com.apple.configurationprofiles
2023-04-06 10:00:54.892664-0700 ShellSearchTest[8294:73792] [SceneConfiguration] Info.plist contained no UIScene configuration dictionary (looking for configuration named "(no name)")

We've added this issue to our backlog, and we will work to address it as time and resources allow. If you have any additional information or questions about this issue, please leave a comment. For additional info about issue management, please read our Triage Process.

[jinxinjuan]

Verified this issue with Visual Studio Enterprise 17.7.0 Preview 1.0. Can repro on iOS Platform with sample project. ShellSearchTest

[BagavathiPerumal]

This issue has been verified in Visual Studio Code 1.104.0 with the latest MAUI version 9.0.110. It can be reproduced on the iOS platform.

14448-iOS.mov