createState()
initState()
didChangeDependencies()
build()
didUpdateWidget()
setState()
deactivate()
dispose()
The createState() method produces an instance of the state that is linked to the stateful widget.
The initState() method is triggered whenever the screen or widget joins the widget tree. This is where you can initialize variables, objects, streams, animation controllers, and more.
This phase always follows the initState() method initially. This is when you execute actions like making API requests in response to updates in parent data or resetting variables.
The build method is responsible for rendering the UI. Whenever there is a need to update the UI, such as on user interaction or during hot-reload, the Flutter framework uses the build() method to reflect those changes.
When the parent widget updates its properties or configurations, the didUpdateWidget method is triggered. This requires regenerating the child widget of the same runtime type, involving detaching the old widget and attaching the updated one with new settings.
This method informs the Flutter framework that the internal state of the widget tree has changed, prompting the framework to re-render the build method.
This method is called when the widget is temporarily not part of the widget tree but may be reattached later.
When a state object or widget is removed from the widget tree, this method is triggered. With this, you can unsubscribe from streams, cancel timers, dispose of animation controllers, close files, and release all associated resources.