Change width & height at UIView()

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Hello from NY o/

On the many projects, I was working out with Storyboards.
From now on, I'm beginning with View Code and I'm trying to change the size of the UIView as something like that: e.g

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class ViewController: UIViewController {
// MARK: - Subviews 
	private lazy var containerView: UIView = {
		let view = UIView() 
  	view.backgroundColor = UIColor.green
		view.frame.size.height = 200.0
		view.frame.size.width = 300.0 
 		view.sizeToFit()
		view.translatesAutoresizingMaskIntoConstraints = false
	
		return view 
	}()
// MARK: - Lifecycle 
	override func viewDidLoad() {
		super.viewDidLoad()
		view.backgroundColor = UIColor.white
     
		view.addSubview(containerView)
	
		containerView.centerXAnchor.constraint(equalTo: view.centerXAnchor).isActive = true
		containerView.centerYAnchor.constraint(equalTo: view.centerYAnchor).isActive = true
	}
}

And the size of the View is not sizing. I need use CGRect to change the size of the UIView? But how to center with auto layout when CGRect(x: 0, y: 0, height: 200, width: 350)?
The x & y stay to hard to keep center x & center y at any screen size?

Thanks a lot for you help.

Cheers.

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