Do you use UIKit or SwiftUI in your work?

Yes, I use both frameworks depending on the project requirements.

UIKit is a mature framework suitable for projects with a long history, complex customization of interface elements, integration with low-level iOS components, and cases where maximum backward compatibility is needed.

SwiftUI is a declarative approach that simplifies interface development, especially for new projects, cross-platform applications (iOS, macOS, watchOS, tvOS), and prototyping. It allows writing more concise and understandable code.

Projects often use a combination of these frameworks, for example, using UIHostingController to embed SwiftUI views into UIKit and vice versa.

When choosing a framework, I consider the following factors:

• Support for older OS versions: UIKit is better for older iOS versions.
• UI/Animation complexity: SwiftUI often simplifies creating complex animations and transitions.
• Team size and experience: Knowledge of UIKit is more widespread in the market.
• Future development of the project: SwiftUI is actively developing and is the future native technology of Apple.

// Example of using UIHostingController for a SwiftUI View in UIKit
import UIKit
import SwiftUI

class MyUIKitViewController: UIViewController {

    override func viewDidLoad() {
        super.viewDidLoad()

        let mySwiftUIView = MyCustomSwiftUIView()
        let hostingController = UIHostingController(rootView: mySwiftUIView)

        // Adding SwiftUI view to the UIViewController hierarchy
        addChild(hostingController)
        view.addSubview(hostingController.view)

        // Setting Constraints
        hostingController.view.translatesAutoresizingMaskIntoConstraints = false
        NSLayoutConstraint.activate([
            hostingController.view.topAnchor.constraint(equalTo: view.topAnchor),
            hostingController.view.leadingAnchor.constraint(equalTo: view.leadingAnchor),
            hostingController.view.trailingAnchor.constraint(equalTo: view.trailingAnchor),
            hostingController.view.bottomAnchor.constraint(equalTo: view.bottomAnchor)
        ])

        hostingController.didMove(toParent: self)
    }
}

struct MyCustomSwiftUIView: View {
    var body: some View {
        Text("Hello from SwiftUI!")
            .padding()
            .background(Color.blue)
            .foregroundColor(.white)
            .cornerRadius(10)
    }
}

Both frameworks have their strengths, and the choice depends on the specific task and project context.