StatefulWidgets are separated into 2 classes because one part is entirely immutable . Widget subclass cannot store any mutable field. We are not in React where “Components” are mutable and the instance stays the same for the whole life of the component.
Read moreWhat’s the role of runApp ()?
The runApp() function should return widget that would be attached to the screen as a root of the widget Tree that will be rendered .20 Tem 2020
Read moreWhat is Flutter widget?
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 moreWhy are StatefulWidget and state separate classes flutter?
There are multiple reasons : Widgets are immutable . Since StatefulWidget extends Widget it therefore must be immutable too. Splitting the declaration into two classes allows both StatefulWidget to be immutable and State to be mutable.
Read moreWhat is flutter build method?
The flutter build method in flutter describes the user interface represented by this widget when it is inserted in the build context provided in the widget tree and the dependency of the widget is changed .
Read moreDoes a new state object is created if the widget re build?
The State object consists of values that can change. The State object contains its associated widget’s ‘mutable state . ‘ — it stores values that can change over time. When those values have changed, more often than not, the associated StatefulWidget is re-created.
Read moreWhat’s the job of the build () method?
build method Null safety Describes the part of the user interface represented by this widget . The framework calls this method when this widget is inserted into the tree in a given BuildContext and when the dependencies of this widget change (e.g., an InheritedWidget referenced by this widget changes).
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