What’s new in UIKit

// Building an "Open in New Window" action

let newSceneAction = UIWindowScene.ActivationAction({ _ in

    // Create the user activity that represents the new scene content
    let userActivity = NSUserActivity(activityType: "com.myapp.detailscene")

    // Return the activation configuration
    return UIWindowScene.ActivationConfiguration(userActivity: userActivity)

})

class AppDelegate: UIResponder, UIApplicationDelegate {

    override func buildMenu(with builder: UIMenuBuilder) {
      
        // Use the builder to modify the main menu...
    }
}

let appearance = UITabBarAppearance()
appearance.backgroundEffect = nil
appearance.backgroundColor = .blue

tabBar.scrollEdgeAppearance = appearance


let scrollView = ... // Content scroll view in your app
viewController.setContentScrollView(scrollView, for: .bottom)

// Creating a button with UIButton.Configuration

var config = UIButton.Configuration.tinted()

config.title = "Add to Cart"
config.image = UIImage(systemName: "cart.badge.plus")
config.imagePlacement = .trailing
config.buttonSize = .large
config.cornerStyle = .capsule

self.addToCartButton = UIButton(configuration: config)

// Using a hierarchical color symbol

let configuration = UIImage.SymbolConfiguration(
    hierarchicalColor: UIColor.systemOrange
)

let image = UIImage(
    systemName: "sun.max.circle.fill",
    withConfiguration: configuration
)

// New UICollectionViewCell.configurationUpdateHandler closures

let cell: UICollectionViewCell = ...

cell.configurationUpdateHandler = { cell, state in
    var content = UIListContentConfiguration.cell().updated(for: state)
    content.text = "Hello world!"
    if state.isDisabled {
        content.textProperties.color = .systemGray
    }
    cell.contentConfiguration = content
}

// Image display preparation

if let image = UIImage(contentsOfFile: pathToImage) {
    // Prepare the image for display asynchronously.
    Task {
        let preparedImage = await image.byPreparingForDisplay()

        imageView.image = preparedImage
    }
}

// Image thumbnailing

if let bigImage = UIImage(contentsOfFile: pathToBigImage) {
    // Prepare the thumbnail asynchronously.
    Task {
        let smallImage = await bigImage.byPreparingThumbnail(ofSize: smallSize)

        imageView.image = smallImage
    }
}