NullPointer from SearchHandlerAppearanceTracker on iOS

[Larhei]

Description

Im getting a null pointer on iOS when navigating back to a page containing a Shell.Searchhandler.
CallStack is
Unhandled managed exception: Object reference not set to an instance of an object. (System.NullReferenceException) at Microsoft.Maui.Platform.ColorExtensions.ToPlatform(Color color) at Microsoft.Maui.Controls.Platform.Compatibility.SearchHandlerAppearanceTracker.UpdateClearPlaceholderIconColor(Color targetColor) at Microsoft.Maui.Controls.Platform.Compatibility.SearchHandlerAppearanceTracker.UpdateTextColor(UITextField textField) at Microsoft.Maui.Controls.Platform.Compatibility.SearchHandlerAppearanceTracker.UpdateSearchBarColors() at Microsoft.Maui.Controls.Platform.Compatibility.ShellPageRendererTracker.SetAppeared() at Microsoft.Maui.Controls.Platform.Compatibility.ShellPageRendererTracker.PageAppearing(Object sender, EventArgs e) at Microsoft.Maui.Controls.Page.SendAppearing() at Microsoft.Maui.Controls.Shell.SendPageAppearing(Page page) at Microsoft.Maui.Controls.ShellContent.SendPageAppearing(Page page) at Microsoft.Maui.Controls.ShellContent.SendAppearing() at Microsoft.Maui.Controls.ShellSection.PresentedPageAppearing() at Microsoft.Maui.Controls.ShellSection.OnPopAsync(Boolean animated)

Well I guess this is the reason for the error
Line

It should be
uiButton.TintColor = targetColor?.ToPlatform() ?? _defaultPlaceholderTintColor;

Also there is an other interesting code segments.
Here

In short. All calls to ToPlatform() for color should be xxx?.ToPlatform() in case there is no null check ;-)

Steps to Reproduce

No response

Link to public reproduction project repository

No response

Version with bug

8.0.3

Is this a regression from previous behavior?

Not sure, did not test other versions

Last version that worked well

Unknown/Other

Affected platforms

iOS

Affected platform versions

iOS

Did you find any workaround?

No

Relevant log output

No response

[PureWeen]

Related to #14442

[ghost]

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