The build method is called any time you call setState , your widget’s dependencies update, or any of the parent widgets are rebuilt (when setState is called inside of those). Your widget will depend on any InheritedWidget you use, e.g. Theme. of(context) , MediaQuery. of(context) etc.16 Ağu 2019
Read moreWhat is the build method?
The build method is called any time you call setState , your widget’s dependencies update, or any of the parent widgets are rebuilt (when setState is called inside of those). Your widget will depend on any InheritedWidget you use, e.g. Theme. of(context) , MediaQuery. of(context) etc.16 Ağu 2019
Read moreWhat is widget tree and element tree in Flutter?
So that means that the widget tree has all the widget configuration and the element tree has all rendered widgets on the screen . There is one more tree named render tree, but the user doesn’t have to interact with it. Render tree is basically a low-level layout, painting system that inherits from the render objects.14 May 2021
Read moreWhat are the trees available in Flutter?
Under the hood, Flutter uses 3 instances of trees. Yes, you guessed it, these are: Widget tree, Element tree and Render Object tree . Each one of them has slightly different purposes, but combined together they allow for fast UI rendering and great performance.
Read moreHow do you find the widget tree Flutter?
Inspecting a widget Click any widget in the app’s UI ; this selects the widget on the app’s screen, and scrolls the widget tree to the corresponding node. Toggle the Select Widget Mode button again to exit widget select mode. When debugging layout issues, the key fields to look at are the size and constraints fields.
Read moreWhat is a stateless widget in flutter?
According to Flutter’s official website, which is the very first resource for learning about anything Flutter, ” a Stateless widget is a widget that describes part of the user interface by building a constellation of other widgets that describe the user interface more concretely “.
Read moreWhy do you need to call setState (() }) in a StatefulWidget 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
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