ScaffoldMessengerState class Null safety

State for a ScaffoldMessenger.

A ScaffoldMessengerState object can be used to showSnackBar for every registered Scaffold that is a descendant of the associated ScaffoldMessenger. Scaffolds will register to receive SnackBars from their closest ScaffoldMessenger ancestor.

Typically obtained via ScaffoldMessenger.of.

Mixed in types




context BuildContext
The location in the tree where this widget builds. [...]
read-only, inherited
hashCode int
The hash code for this object. [...]
read-only, inherited
mounted bool
Whether this State object is currently in a tree. [...]
read-only, inherited
runtimeType Type
A representation of the runtime type of the object.
read-only, inherited
widget ScaffoldMessenger
The current configuration. [...]
read-only, inherited


build(BuildContext context) Widget
Describes the part of the user interface represented by this widget. [...]
clearSnackBars() → void
Removes all the snackBars currently in queue by clearing the queue and running normal exit animation on the current snackBar.
createTicker(TickerCallback onTick) Ticker
Creates a ticker with the given callback. [...]
deactivate() → void
Called when this object is removed from the tree. [...]
@mustCallSuper, @protected, inherited
debugFillProperties(DiagnosticPropertiesBuilder properties) → void
Add additional properties associated with the node. [...]
didChangeDependencies() → void
Called when a dependency of this State object changes. [...]
didUpdateWidget(covariant ScaffoldMessenger oldWidget) → void
Called whenever the widget configuration changes. [...]
@mustCallSuper, @protected, inherited
dispose() → void
Called when this object is removed from the tree permanently. [...]
hideCurrentSnackBar({SnackBarClosedReason reason = SnackBarClosedReason.hide}) → void
Removes the current SnackBar by running its normal exit animation. [...]
initState() → void
Called when this object is inserted into the tree. [...]
@mustCallSuper, @protected, inherited
noSuchMethod(Invocation invocation) → dynamic
Invoked when a non-existent method or property is accessed. [...]
reassemble() → void
Called whenever the application is reassembled during debugging, for example during hot reload. [...]
@mustCallSuper, @protected, inherited
removeCurrentSnackBar({SnackBarClosedReason reason = SnackBarClosedReason.remove}) → void
Removes the current SnackBar (if any) immediately from registered Scaffolds. [...]
setState(VoidCallback fn) → void
Notify the framework that the internal state of this object has changed. [...]
@protected, inherited
showSnackBar(SnackBar snackBar) ScaffoldFeatureController<SnackBar, SnackBarClosedReason>
Shows a SnackBar across all registered Scaffolds. [...]
toDiagnosticsNode({String? name, DiagnosticsTreeStyle? style}) DiagnosticsNode
Returns a debug representation of the object that is used by debugging tools and by DiagnosticsNode.toStringDeep. [...]
toString({DiagnosticLevel minLevel =}) String
A string representation of this object. [...]
toStringShort() String
A brief description of this object, usually just the runtimeType and the hashCode. [...]


operator ==(Object other) bool
The equality operator. [...]