Fix Issue #1238

[cat0363]

If you rotate the screen while the Popup is displayed, the Popup will be displayed
in an unintended position. This PR ensures that the popup appears in the correct
position after screen rotation.

Description of Change

This issue was resolved by overriding MauiPopup's ViewWilTransitionToSize method and
calling the PopupExtension's SetSize and SetLayout methods after rotation.
Because the anchor is not set again after screen rotation. By setting this anchor again,
the Popup will be displayed at the intended location.

[MauiPopup.macios.cs]

public override void ViewWillTransitionToSize(CGSize toSize, IUIViewControllerTransitionCoordinator coordinator)
{
    coordinator.AnimateAlongsideTransition((IUIViewControllerTransitionCoordinatorContext obj) => {			
        // Before screen rotate
    }, (IUIViewControllerTransitionCoordinatorContext obj) => {
        // After screen rotate
        if (VirtualView is not null)
        {
            PopupExtensions.SetSize(this, VirtualView);
            PopupExtensions.SetLayout(this, VirtualView);
        }
    });
    base.ViewWillTransitionToSize(toSize, coordinator);
}

Linked Issues

• Fixes [BUG] Popup is not displayed in the intended position when the terminal is rotated on iOS. #1238

PR Checklist

• Has a linked Issue, and the Issue has been approved(bug) or Championed (feature/proposal)
• Has tests (if omitted, state reason in description)
• Has samples (if omitted, state reason in description)
• Rebased on top of main at time of PR
• Changes adhere to coding standard
• Documentation created or updated: https://github.com/MicrosoftDocs/CommunityToolkit/pull/XYZ

Additional information

Below is the execution result.

When Requires full request in info.plist is OFF.

[iOS 13.7]

iPad.7th.generation.iOS.13.7.2023-06-14.13-56-07.mp4

[iOS 14.5]

iPad.8th.generation.iOS.14.5.2023-06-14.13-41-18.mp4

[iOS 15.5]

iPad.9th.generation.iOS.15.5.2023-06-14.13-33-06.mp4

[iOS 16.4]

iPad.10th.generation.iOS.16.4.2023-06-14.13-26-39.mp4

When Requires full request in info.plist is ON.

[iOS 13.7]

iPad.7th.generation.iOS.13.7.2023-06-14.14-07-43.mp4

[iOS 14.5]

iPad.8th.generation.iOS.14.5.2023-06-14.14-25-09.mp4

[iOS 15.5]

iPad.9th.generation.iOS.15.5.2023-06-14.14-27-53.mp4

[iOS 16.4]

iPad.10th.generation.iOS.16.4.2023-06-14.14-30-15.mp4

By applying this solution, the position of the popup after screen rotation became as intended.