BottomNavigation class
The bottom navigation displays icons and optional text at the bottom of the screen for switching between different primary destinations in an app.
It's usually used on ScaffoldPage.bottomBar
See also:
- BottomNavigationItem, the items used by this widget
- BottomNavigationThemeData, used to style this widget
- ScaffoldPage, used to layout pages
- Inheritance
-
- Object
- DiagnosticableTree
- Widget
- StatelessWidget
- BottomNavigation
- Available Extensions
Constructors
-
Creates a bottom navigation
const
Properties
- hashCode → int
-
The hash code for this object.
no setterinherited
- index → int
-
The current selected index. This must be in the range of 0 to
items.lengthfinal -
items
→ List<
BottomNavigationItem> -
The items displayed by this widget. There must be at least 2
items in the list.
final
- key → Key?
-
Controls how one widget replaces another widget in the tree.
finalinherited
-
onChanged
→ ValueChanged<
int> ? -
Called when the current index should be changed. If null, the bottom
navigation items are considered disabled.
final
- runtimeType → Type
-
A representation of the runtime type of the object.
no setterinherited
- style → BottomNavigationThemeData?
-
Used to style this bottom navigation bar. If non-null,
it's mescled with FluentThemeData.bottomNavigationTheme
final
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
DiagnosticsNodeobjects describing this node's children.inherited -
debugFillProperties(
DiagnosticPropertiesBuilder properties) → void -
Add additional properties associated with the node.
inherited
-
noSuchMethod(
Invocation invocation) → dynamic -
Invoked when a nonexistent 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.
inherited