The UIViewController Lifecycle: From Creation to On-Screen
Think of a UIViewController as an actor with cues to enter, perform, and exit. Its lifecycle methods are your script for setting up data, updating the UI, and cleaning up resources.
A UIViewController is like an actor following stage directions for a screen's life. Its lifecycle methods are automatic hooks iOS calls, giving you precise moments to prepare, present, and tear down your view. You use them to fetch data, configure UI, start animations, and save state. It's fundamental to building any iOS interface. The biggest footgun is putting one-time setup logic in `viewWillAppear` instead of `viewDidLoad`, causing it to run multiple times and creating bugs or performance drains.
Read the original → developer.apple.com
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