In iOS development with UIKit, every UIViewController goes through a clear and predictable life cycle. It all starts when the controller’s view is first loaded into memory, continues as it appears on screen, and ends when it’s no longer visible or needed. Understanding this life cycle helps you know the right place to set up your UI, load data, and clean up resources. Each phase from viewDidLoad to viewWillAppear, viewDidAppear, and eventually viewWillDisappear and viewDidDisappear gives you a chance to hook into what’s happening and respond appropriately.
Dive into the UI ViewController life cycle in iOS: from viewDidLoad() to viewDidAppear(), learn when to load data, update UI and release resources.
