Describe the process of widget re-rendering in Flutter when using setState.
- Flutter automatically determines when to re-render widgets.
- The re-rendering process in Flutter is non-deterministic.
- Widgets marked with setState are re-rendered when the build method is called.
- Widgets using setState trigger a manual rebuild of the entire widget tree.
In Flutter, when a widget calls the setState method, it marks itself as dirty, and during the next frame, the framework schedules a rebuild for that widget. The build method is then invoked, allowing the widget to update its UI. This process is efficient because it ensures that only the necessary widgets are re-rendered, optimizing performance. Understanding how setState triggers re-rendering is essential for writing efficient and responsive Flutter applications.
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