ValueChanged<T> = void Function(T value) Signature for callbacks that report that an underlying value has changed . See also: ValueSetter, for callbacks that report that a value has been set.
Read moreWhat is widget class flutter?
Widget class Null safety Widgets are the central class hierarchy in the Flutter framework . A widget is an immutable description of part of a user interface. Widgets can be inflated into elements, which manage the underlying render tree. Widgets themselves have no mutable state (all their fields must be final).
Read moreWhat is ValueChanged in flutter?
ValueChanged<T> = void Function(T value) Signature for callbacks that report that an underlying value has changed . See also: ValueSetter, for callbacks that report that a value has been set.
Read moreWhat is the use of addListener in Flutter?
Adds a listener callback that is called whenever a new concrete ImageInfo object is available . If a concrete image is already available, this object will call the listener synchronously.
Read moreHow do I add ChangeNotifierProvider?
DO create a new ChangeNotifier inside create .
Read moreWhat is Valuelistenablebuilder in Flutter?
A widget whose content stays synced with a ValueListenable . Given a ValueListenable<T> and a builder which builds widgets from concrete values of T , this class will automatically register itself as a listener of the ValueListenable and call the builder with updated values when the value changes.
Read moreWhat is the alternative of setState in Flutter?
The short answer is that just add currentIndex as one of the parameter inside your navBarSection . Inside home. dart , just pass the currentIndex of the page.
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