CupertinoNavigationBarBackButton class Null safety

A nav bar back button typically used in CupertinoNavigationBar.

This is automatically inserted into CupertinoNavigationBar and CupertinoSliverNavigationBar's leading slot when automaticallyImplyLeading is true.

When manually inserted, the CupertinoNavigationBarBackButton should only be used in routes that can be popped unless a custom onPressed is provided.

Shows a back chevron and the previous route's title when available from the previous CupertinoPageRoute.title. If previousPageTitle is specified, it will be shown instead.

Inheritance

Constructors

CupertinoNavigationBarBackButton({Key? key, Color? color, String? previousPageTitle, VoidCallback? onPressed})
Construct a CupertinoNavigationBarBackButton that can be used to pop the current route.
const

Properties

color → Color?
The Color of the back button.
final
hashCode → int
The hash code for this object.
nonVirtual">@nonVirtualread-onlyinherited
key → Key?
Controls how one widget replaces another widget in the tree.
finalinherited
onPressed → VoidCallback?
An override callback to perform instead of the default behavior which is to pop the Navigator.
final
previousPageTitle → String?
An override for showing the previous route's title. If null, it will be automatically derived from CupertinoPageRoute.title if the current and previous routes are both CupertinoPageRoutes.
final
runtimeType → Type
A representation of the runtime type of the object.
read-onlyinherited

Methods

build(BuildContext context) → Widget
Describes the part of the user interface represented by this widget.
override
createElement() → StatelessElement
Creates a StatelessElement to manage this widget's location in the tree.
inherited
debugDescribeChildren() → List<DiagnosticsNode>
Returns a list of DiagnosticsNode objects describing this node's children.
protected">@protectedinherited
debugFillProperties(DiagnosticPropertiesBuilder properties) → void
Add additional properties associated with the node.
inherited
noSuchMethod(Invocation invocation) → dynamic
Invoked when a non-existent method or property is accessed.
inherited
toDiagnosticsNode({String? name, DiagnosticsTreeStyle? style}) → DiagnosticsNode
Returns a debug representation of the object that is used by debugging tools and by DiagnosticsNode.toStringDeep.
inherited
toString({DiagnosticLevel minLevel = DiagnosticLevel.info}) → String
A string representation of this object.
inherited
toStringDeep({String prefixLineOne = '', String? prefixOtherLines, DiagnosticLevel minLevel = DiagnosticLevel.debug}) → String
Returns a string representation of this node and its descendants.
inherited
toStringShallow({String joiner = ', ', DiagnosticLevel minLevel = DiagnosticLevel.debug}) → String
Returns a one-line detailed description of the object.
inherited
toStringShort() → String
A short, textual description of this widget.
inherited

Operators

operator ==(Object other) → bool
The equality operator.
nonVirtual">@nonVirtualinherited