[iOS] Managed DatePicker initially shows only today's date in an empty flyout with an empty selection - After reopening, it displays a full list, but the centered date is incorrect

[agneszitte]

Current behavior

Managed Date Picker for iOS:

• First Opening: When opening the Managed DatePicker for the first time, the flyout appears mostly empty, displaying only today's date (February 19, 2025 when I tested) while the surrounding list is missing. The selection is centered in the middle of the screen but appears as an empty row.

  

• Second Opening: After closing and reopening the Managed DatePicker, it now properly displays a full list of dates, but the centered selection is not today's date (Getting June 23, 2029 when I tested, where it should be February 19, 2025).

  

---

Managed-Date-Picker-iOS-issue.mp4

Expected behavior

• On the first opening, the Managed DatePicker should show a full list of selectable dates rather than appearing empty, with today's date centered in a fully populated list. (To match the behavior of all the other platforms)
• On reopening, if no date has been selected, today's date should remain centered. If a date was selected, then the last selected date should be centered, ensuring consistency. (To match the behavior of all the other platforms)

How to reproduce it (as minimally and precisely as possible)

Solution to easily repro the issue: Issue19567.zip

1. Create a Blank Uno Platform app with uno.sdk 5.6.36.
2. Add in MainPage.xaml:

         xmlns:not_win="http://uno.ui/not_win"
         xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
         mc:Ignorable="not_win"
         ---
         <DatePicker not_win:UseNativeStyle="False" />
   

3. Launch the app for iOS
4. Open the Managed DatePicker for the first time
   Observe: The flyout appears mostly empty, displaying only today's date (February 19, 2025 when I tested) while the surrounding list is missing. The selection is centered in the middle of the screen but appears as an empty row.
5. Open the Managed DatePicker for the second time
   Observe: It now properly displays a full list of dates, but the centered selection is not today's date (June 23, 2029 when I tested).

Workaround

N/A

Works on UWP/WinUI

Yes

Environment

• Templates/SDK: 5.6.36
• VS VSIX: 5.6.31

Affected platforms

iOS

IDE

Visual Studio 2022

IDE version

(64-bit) - Version 17.13.1

[jeromelaban]

The managed date picker is not the default on iOS and is not prioritized for fixing at this time.