How to show start animation in uiview?

I want to show an animation after the my OnboardingController with container – Page with image view is opened. I use this code for to do it, but the animation doesn’t work in my app:

My code in ViewController class:

class ViewController: UIViewController {
    
    lazy var button: UIButton = {
        let button = UIButton()
        button.backgroundColor = .darkGray
        button.translatesAutoresizingMaskIntoConstraints = false
        button.addTarget(self, action: #selector(setupViews), for: .touchUpInside)
        return button
    }()
    
    override func viewDidLoad() {
        super.viewDidLoad()
        view.addSubview(button)
        button.frame = CGRect(x: 400, y: 100, width: 100, height: 50)
    }
    
    @objc func setupViews() {
        let detailController = OnboardingController()
        self.present(detailController, animated: true, completion: nil)
    }
    
}

My code in OnboardingController class:

class OnboardingController: UIViewController {
    
    let container: UIView = {
        let view = UIView()
        view.backgroundColor = .blue
        view.translatesAutoresizingMaskIntoConstraints = false
        return view
    }()
    let views: Page = {
        let view = Page()
        view.backgroundColor = .red
        view.translatesAutoresizingMaskIntoConstraints = false
        return view
    }()
        
    override func viewDidLoad() {
        super.viewDidLoad()
        view.addSubview(container)
        container.addSubview(views)
        
        container.topAnchor.constraint(equalTo: view.topAnchor, constant: 0.0).isActive = true
        container.bottomAnchor.constraint(equalTo: view.bottomAnchor, constant: 0.0).isActive = true
        container.leadingAnchor.constraint(equalTo: view.leadingAnchor, constant: 0.0).isActive = true
        container.trailingAnchor.constraint(equalTo: view.trailingAnchor, constant: 0.0).isActive = true

        views.topAnchor.constraint(equalTo: container.topAnchor).isActive = true
        views.bottomAnchor.constraint(equalTo: container.bottomAnchor).isActive = true
        views.leadingAnchor.constraint(equalTo: container.leadingAnchor).isActive = true
        views.trailingAnchor.constraint(equalTo: container.trailingAnchor).isActive = true
    }
    
}

My code in Page class:

class Page: UIView {
        
    private let imageView: UIImageView = {
        let image = UIImageView()
        image.image = UIImage(named: "1")
        image.translatesAutoresizingMaskIntoConstraints = false
        return image
    }()
    
    override init(frame: CGRect) {
        super.init(frame: frame)
        addSubview(imageView)
        
        imageView.topAnchor.constraint(equalTo: topAnchor).isActive = true
        imageView.bottomAnchor.constraint(equalTo: bottomAnchor).isActive = true
        imageView.leadingAnchor.constraint(equalTo: leadingAnchor, constant: -120).isActive = true
        imageView.trailingAnchor.constraint(equalTo: trailingAnchor, constant: 0).isActive = true
        
        self.imageView.transform = CGAffineTransformTranslate(.identity, 0, 0)
        UIView.animate(withDuration: 7.0, delay: 0, animations: {
            self.imageView.transform = CGAffineTransformTranslate(.identity, 120, 0)
        }, completion: nil)
    }
    
    required init?(coder: NSCoder) {
        fatalError("error")
    }
}

How to solve this problem?