ViewController life cycle?

Question

Accepted Answer

ViewController life cycle refers to the sequence of events that occur during the creation, loading, and unloading of a view controller.

viewDidLoad() is called when the view controller's content view is created and loaded into memory.
viewWillAppear(_:) is called just before the view controller's content view is added to the app's view hierarchy.
viewDidAppear(_:) is called after the view controller's content view has been added to the app's view hierarchy.
viewWillDisappear(_:) is called just before the view controller's content view is removed from the app's view hierarchy.
viewDidDisappear(_:) is called after the view controller's content view has been removed from the app's view hierarchy.

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