Swift UIKIT components do not show on a working view - swift

Question

I'm turning my hand from years of Java / C++ / C to trying to learn Swift and how to develop on Apple.
I've tried a lot of tutorials and for what I want to achieve I need to use a splitview controller.
I need to have a few different detail views and can't work out how to do this via storyboard and thought I'd try to do it with code.
Following a tutorial and several google searches Im hitting a problem which I realise is me being a newbiee and ask for your help.
To keep things simple I created a test viewcontroller class and set it in the storyboard no problem.
import UIKit;
class tesctVC : UIViewController {
var scoreLabel: UILabel!
override func loadView() {
view = UIView()
view.backgroundColor = .white
scoreLabel = UILabel()
scoreLabel.translatesAutoresizingMaskIntoConstraints = false
scoreLabel.textAlignment = .right
scoreLabel.text = "Score: 0"
view.addSubview(scoreLabel)
// more code to come!
}
}
When I change to background color it shows as expected.
But when I try to add anything else, I've tried UILabels, UIButtons etc, they do not show.
Would you please give me some pointers?

Answer 1

Thanks again.
I thought this may help others.
This is still WIP but shows some hints I found along the way.
I want to add a bunch of labels & buttons etc.
This in so far as is written does the job. It needs more formatting and so on.
The extension is needed to set a stacks background color. I think someone explained its because a StackView is not a drawable object.
extension UIStackView {
func addBackground(color: UIColor) {
let subView = UIView(frame: bounds)
subView.backgroundColor = color
subView.autoresizingMask = [.flexibleWidth, .flexibleHeight]
insertSubview(subView, at: 0)
}
}
class DetailViewController: UIViewController , UIWebViewDelegate {
var usernameEdt: UITextField!
var passwordEdt: UITextField!
var statusLabel: UILabel!
var LogubButton = UIButton()
// Draw the login page
func loginPage() {
// Create the top level statck
let stackView = UIStackView()
stackView.addBackground(color: .white)
stackView.axis = .vertical
stackView.alignment = .center // .leading .firstBaseline .center .trailing .lastBaseline
stackView.distribution = .fillEqually // .fillEqually .fillProportionally .equalSpacing .equalCentering
// Add the title
let label = UILabel()
label.frame = CGRect(x: 150, y: 200, width: 200, height: 20)
label.font = UIFont.boldSystemFont(ofSize: 20.0)
label.text = "Login Details"
label.textColor = .blue
stackView.addArrangedSubview(label)
// Add Username
usernameEdt = UITextField()
usernameEdt.placeholder = "Enter Your Username"
stackView.addArrangedSubview(usernameEdt)
// Add Password
passwordEdt = UITextField()
passwordEdt.placeholder = "Enter Your Password"
stackView.addArrangedSubview(passwordEdt)
self.view = stackView
}
Thanks
Jeff