Modernize your UIKit app

// Use local screen references
// Access the correct screen through a windowScene
let screen = window?.windowScene?.screen

// Pass in local screen references
func generateThumbnail(_ image: UIImage, screen: UIScreen) -> UIImage {
    // existing code, replacing main screen with local screen reference
    // ...
}

// Replace the screen's scale with trait collection's displayScale
override func layoutSubviews() {
    super.layoutSubviews()

    // layoutSubviews will be called again automatically when displayScale changes
    let displayScale = traitCollection.displayScale
    // ...
}

// Manually register for trait changes
let displayScaleTrait: [UITrait] = [UITraitDisplayScale.self]
registerForTraitChanges(displayScaleTrait) {
    (view: GalleryView, previousTraitCollection: UITraitCollection) in
    view.cache.invalidate()
}

// UIWindowSceneDelegate
func windowScene(
    _ windowScene: UIWindowScene,
    didUpdateEffectiveGeometry previousEffectiveGeometry: UIWindowScene.Geometry
) {
    let geometry = windowScene.effectiveGeometry
    let availableSpace = geometry.coordinateSpace.bounds
    // ...
}

// Checking available space
override func viewDidLayoutSubviews() {
    super.viewDidLayoutSubviews()

    let availableSpace = view.bounds.size
    // ...
}

// Configure motion and heading bodies
override func viewDidLoad() {
    super.viewDidLoad()

    motionManager.deviceMotionBody = view
    locationManager.headingBody = view
}

tabBarController.sidebar.preferredPlacement = .sidebar

tabBarController.sidebar.isAvailable

// Set the prominent tab
let tabs = [
    // ...
]
let tabBarController = UITabBarController(tabs: tabs)
tabBarController.prominentTabIdentifier = "cart"

// Customize bar minimization behavior
override init(
    nibName nibNameOrNil: String?,
    bundle nibBundleOrNil: Bundle?
) {
    super.init(nibName: nibNameOrNil, bundle: nibBundleOrNil)

    navigationItem.barMinimizationBehavior = .always
    navigationItem.barMinimizationSafeAreaAdjustment = .never
}

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