How to fetch the width and height of a programatically added view in Swift iOS

Question

I have added a UIView and a UIImageView programatically, but I need its width and height. Is it possible to fetch it, if yes, please share how to fetch it.

Code:

let View1: UIView = {
            let viewView = UIView()
            viewView.translatesAutoresizingMaskIntoConstraints = false
            viewView.contentMode = .scaleAspectFit
            print(UserDefaults.standard.bool(forKey: "backgroundColourSelected"))
            if UserDefaults.standard.bool(forKey: "backgroundColourSelected") {
                viewView.backgroundColor = self.viewColor
            }else {
                viewView.backgroundColor = .white
            }
            viewView.clipsToBounds = true
            return viewView
        }()
    
        self.canvasView.addSubview(View1)
        
        View1.centerXAnchor.constraint(equalTo: canvasView.centerXAnchor, constant: 0).isActive = true
        View1.centerYAnchor.constraint(equalTo: canvasView.centerYAnchor, constant: 0).isActive = true
        View1.widthAnchor.constraint(equalTo: canvasView.widthAnchor, constant: 0).isActive = true
        View1.heightAnchor.constraint(equalTo: canvasView.widthAnchor, multiplier: aspectRatio).isActive = true

Answer 1

You need to know the life cycle of view controller.

To get height of any view use viewDidLayoutSubviews.

override func viewDidLayoutSubviews() {
      super.viewDidLayoutSubviews()

      print(view1.frame.size)
}

size property will print both final height and width.