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override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view, typically from a nib.
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
@IBAction func buttonAction(_ sender: AnyObject) {
let newView = UIView(frame: CGRect(x: 0, y: 0, width: 240, height: 128))
newView.heightAnchor.constraint(equalToConstant: 128)
newView.widthAnchor.constraint(equalToConstant: 240)
newView.backgroundColor = UIColor.green
stackOutlet.addArrangedSubview(newView)
stackOutlet.heightAnchor.constraint(equalToConstant: stackOutlet.frame.size.height + 128)
print(stackOutlet.subviews.count)
The number of subviews is increasing, but nothing is changing on the screen. I suspect that my StackView doesnt resize properly right ?
Nevermind I found a solution :
newView.widthAnchor.constraint(equalToConstant: 240).isActive = true
newView.heightAnchor.constraint(equalToConstant: 128).isActive = true
You need the .isActive = true
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