Xcode 10 - Scroll View is not allowing scrolling when adding button programmatically - ios

Question

I'm getting data from a database and trying to display the data as buttons, I have got this working but when I run the app on the Xcode simulator the buttons are showing and I can see they are off the screen but I can't scroll.
I have tried adding a "view" inside the "scroll view" with a fixed height and then adding the buttons to that view and still nothing.
// Adding the scroll view and the view
#IBOutlet weak var scroll: UIScrollView!
#IBOutlet weak var content: UIView!
// Button Settings
var buttonX = 100
var buttonY = 0
let buttonWidth = 200
let buttonHeight = 50
let image = UIImage(named: "button") as UIImage?
override func viewDidLoad() {
super.viewDidLoad()
for element in contentsArray {
// Adding a button for each client name
let button = UIButton(type: .system)
button.setTitle(element, for: .normal)
button.tintColor = .white
button.titleLabel?.font = UIFont.boldSystemFont(ofSize: 22)
button.setBackgroundImage(image, for: .normal)
button.centerXAnchor.constraint(equalTo: button.centerXAnchor).isActive = true
button.addTarget(self, action: #selector(buttonClicked), for: .touchUpInside)
button.frame = CGRect(x: buttonX, y: buttonY, width: buttonWidth, height: buttonHeight)
content.addSubview(button)
buttonY = buttonY + 70
}
}
I am not getting any errors in the console when running the app.

Answer 1

Once your finish adding buttons, set the scrollView.contentSize.height to your calculated buttonY
scrollView.contentSize.width = self.view.frame.size.width // non scrollable content width
for element in contentsArray {
...
buttonY = buttonY + 70
}
scrollView.contentSize.height = buttonY // scrollable content height