change UIPicker height programmatically - swift

Question

I would like to modify the height of UIPicker programmatically, I tried to do this but on the simulator the height remains as it was before, I don't see any changes.
#objc open func showPicker(title: String?, selected: String?, strings:[String], color: UIColor? = nil, completion:DPPickerValueIndexCompletion?) {
self.pickerValues = strings
let picker = UIPickerView()
picker.delegate = self
picker.dataSource = self
picker.transform = CGAffineTransformMakeScale(0.5, 0.5)
if let value = selected {
picker.reloadAllComponents()
if strings.count > 0 {
OperationQueue.current?.addOperation {
let index = strings.firstIndex(of: value) ?? 0
picker.selectRow(index, inComponent: 0, animated: false)
}
}
}
self.showPicker(title: title, view: picker, color: color) { (cancel) in
var index = -1
var value: String? = nil
if !cancel, strings.count > 0 {
index = picker.selectedRow(inComponent: 0)
if index >= 0 {
value = self.pickerValues?[index]
}
}
completion?(value, index, cancel || index < 0)
}
}

Answer 1

I don't why it's not resizing itself properly when you translate autoresizing mask into constraints, but it works properly when you use AutoLayout:
let pickerView = UIPickerView()
pickerView.translatesAutoresizingMaskIntoConstraints = false
pickerView.delegate = self
pickerView.dataSource = self
view.addSubview(pickerView)
NSLayoutConstraint.activate([
pickerView.leadingAnchor.constraint(equalTo: view.leadingAnchor),
pickerView.trailingAnchor.constraint(equalTo: view.trailingAnchor),
pickerView.centerYAnchor.constraint(equalTo: view.centerYAnchor),
pickerView.heightAnchor.constraint(equalToConstant: 500)
])