freeCodeCamp/guide/english/swift/view-controller/index.md

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View Controllers

View Controllers

This is an example of what a basic view in Swift looks like.

 import UIKit

 class ViewController: UIViewController {
     // 1
     override func viewDidLoad() {
         // 2
         super.viewDidLoad()
         // 3
         view.backgroundColor = .white
     }  
 }

1. Loads view after the controller loads.
2. Overrides the UIViewController class. This is a necessary step for any view controller.
3. Sets background color to white.