Flutter commonly uses keys when it needs to uniquely identify specific widgets within a collection . Using keys also helps Flutter preserve the state of StatefulWidget s while they’re being replaced with other widgets or just moved in the widget tree.
Read moreWhy is state in Flutter?
State is information that (1) can be read synchronously when the widget is built and (2) might change during the lifetime of the widget. It is the responsibility of the widget implementer to ensure that the State is promptly notified when such state changes, using State. setState.
Read moreWhat is Flutter build context?
A handle to the location of a widget in the widget tree . This class presents a set of methods that can be used from StatelessWidget. build methods and from methods on State objects. BuildContext objects are passed to WidgetBuilder functions (such as StatelessWidget. build), and are available from the State.
Read moreHow do you call a build method in Flutter?
Calling the setState() method in a stateful widget in Flutter calls the build() method first. Not only that, the build() method rebuilds all the descendant widgets. To enhance your fluttering performance, you need to understand the inner mechanism of Flutter.22 May 2021
Read moreWhat is the use of setState () method in flutter?
setState is a way to dynamically change the UI . We call it inside the State Object class of the StatefulWidget. Calling setState marks the corresponding Widget dirty .20 Haz 2021
Read moreWhat is the use of build in Flutter?
Flutter widgets are built using a modern framework that takes inspiration from React . The central idea is that you build your UI out of widgets. Widgets describe what their view should look like given their current configuration and state.
Read moreWhat is state in stateful widget?
The State is the information that can be read synchronously when the widget is built and might change during the lifetime of the widget.
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