Can you describe the lifecycle stages of UIViewController and their purpose?

The lifecycle of UIViewController includes several key stages that allow managing the loading, displaying, and unloading of the controller:

• init — initialization of the controller, creating an instance.
• loadView — creating and configuring the controller's root view, called if the view is not yet loaded.
• viewDidLoad — called after the view has been loaded into memory; this is a good place to initialize data and set up the UI.
• viewWillAppear — called before the view appears on the screen; you can update the UI or prepare for display.
• viewDidAppear — called after the view has appeared; you can start animations or load data here.
• viewWillDisappear — called before the view disappears; you can save state or cancel operations.
• viewDidDisappear — called after the view has disappeared; resources can be released.
• deinit — the destructor of the controller, called when the object is deallocated.

These stages help manage resources and display logic in an iOS application.