[iOS/macCatalyst] [Candidate Fix] Editor shadow and theme regression caused by BackgroundColor reset on initial handler connection#35343
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kubaflo merged 2 commits intoMay 7, 2026
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It would be very helpful if you could test the resulting artifacts from this PR and let us know in a comment if this change resolves your issue. Thank you!
Root Cause of the Regression
PR #34741's MapBackground overrides call platformView.BackgroundColor = null during initial handler connection (when Background is null by default), making Editor controls transparent at startup — breaking shadow rendering and app-theme color bindings.
Description of Change
In EditorHandler.iOS.cs, replaced platformView.BackgroundColor = null with platformView.BackgroundColor = ColorExtensions.BackgroundColor (UIColor.SystemBackground) so the Editor restores the system's adaptive default color instead of becoming transparent. This preserves shadow rendering on initial load and correctly responds to light/dark theme changes.
Issues Fixed
UI Test
iOS:
VerifyEditorPlaceholderWithShadow, VerifyEditor_WithShadow, ShadowsDontRespectControlShape
Mac:
VerifyEditorPlaceholderWithShadow, VerifyEditor_WithShadow, ShadowsDontRespectControlShape, EditorAndEntryInputFieldsShouldChangeColorsOnAppThemeChange, EntryAndEditorPlaceholderTextColorAppThemeBindingUpdatesOnThemeChange, EntryAndEditorTextColorAppThemeBindingUpdatesOnThemeChange - Fails due to this PR - #34741