Calling setState notifies the framework that the internal state of this object has changed in a way that might impact the user interface in this subtree , which causes the framework to schedule a build for this State object.
Read moreWhich method is called to Rerender the widget tree once state is changed?
The setState() method notifies the framework that the internal state of the current object is “dirty,” which means that it has been changed in a way that might impact the UI. After this notification, the framework will call the build() method to update and rebuild a widget.
Read moreWhat can I use instead 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.
Read moreWhy do you need to call setState (() }) in a stateful widget when changing some internal data )?
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 moreCan a stateless widget contain a stateful widget in flutter?
A stateful widget is defined as any widget which changes its state within its lifetime. But it is a very common practice for a StatelessWidget to have a StatefulWidget as one of its children .9 Eyl 2018
Read moreWhat is DART key?
A Key is an identifier for Widgets, Elements and SemanticsNodes . A new widget will only be used to update an existing element if its key is the same as the key of the current widget associated with the element.
Read moreWhen should I use stateful widgets?
Stateful widgets are useful when the part of the user interface you are describing can change dynamically , e.g. due to having an internal clock-driven state, or depending on some system state.
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