systemOverlayStyle property
final
Specifies the style to use for the system overlays (e.g. the status bar on Android or iOS, the system navigation bar on Android).
If this property is null, then AppBarTheme.systemOverlayStyle of ThemeData.appBarTheme is used. If that is also null, an appropriate SystemUiOverlayStyle is calculated based on the backgroundColor.
The AppBar's descendants are built within a
AnnotatedRegion<SystemUiOverlayStyle> widget, which causes
SystemChrome.setSystemUIOverlayStyle to be called
automatically. Apps should not enclose an AppBar with their
own AnnotatedRegion.
This property is used to configure an AppBar.
Implementation
final SystemUiOverlayStyle? systemOverlayStyle;