NestedScrollViewState class Null safety

The State for a NestedScrollView.

The ScrollControllers, innerController and outerController, of the NestedScrollView's children may be accessed through its state. This is useful for obtaining respective scroll positions in the NestedScrollView.

If you want to access the inner or outer scroll controller of a NestedScrollView, you can get its NestedScrollViewState by supplying a GlobalKey<NestedScrollViewState> to the NestedScrollView.key parameter).

NestedScrollViewState can be obtained using a GlobalKey. Using the following setup, you can access the inner scroll controller using globalKey.currentState.innerController.
To create a local project with this code sample, run:
flutter create --sample=widgets.NestedScrollViewState.1 mysample





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
innerController ScrollController
The ScrollController provided to the ScrollView in NestedScrollView.body.
mounted bool
Whether this State object is currently in a tree.
read-only, inherited
outerController ScrollController
The ScrollController provided to the ScrollView in NestedScrollView.headerSliverBuilder.
runtimeType Type
A representation of the runtime type of the object.
read-only, inherited
widget NestedScrollView
The current configuration.
read-only, inherited


activate() → void
Called when this object is reinserted into the tree after having been removed via deactivate.
@mustCallSuper, @protected, inherited
build(BuildContext context) Widget
Describes the part of the user interface represented by this widget.
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 NestedScrollView oldWidget) → void
Called whenever the widget configuration changes.
dispose() → void
Called when this object is removed from the tree permanently.
initState() → void
Called when this object is inserted into the tree.
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
setState(VoidCallback fn) → void
Notify the framework that the internal state of this object has changed.
@protected, inherited
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.