Why don't my selector functions get called when I clicked on my radio buttons in my Xcode Swift project - swift

Question

I have a custom UIView class called SortView with two radio buttons and neither of their respective selector functions are being called when I click on them. I have added an instance of the SortView class to a parent class with view.addView(). Here is my custom class:
class SortView: UIView {
// MARK: - Properties
lazy var driverSortRadioButton: UIButton = {
let button = UIButton(type: .system)
button.setImage(UIImage(named: "Radio Button - Unselected"), for: .normal)
button.setDimensions(height: 25, width: 25)
button.backgroundColor = .clear
button.contentMode = .scaleAspectFill
button.addTarget(self, action: #selector(handleDriverSortRadioButton), for: .touchUpInside)
return button
}()
lazy var pickupTimeSortRadioButton: UIButton = {
let button = UIButton(type: .system)
button.setImage(UIImage(named: "Radio Button - Unselected"), for: .normal)
button.setDimensions(height: 25, width: 25)
button.backgroundColor = .clear
button.contentMode = .scaleAspectFill
button.addTarget(self, action: #selector(handlePickupTimeSortRadioButton), for: .touchUpInside)
return button
}()
private let driverSortTitleLabel: UILabel = {
let label = UILabel()
label.text = "Sort by driver:"
label.textAlignment = .left
label.textColor = .white
label.font = UIFont(name: "AvenirNext-DemiBold", size: 18)
label.backgroundColor = .clear
return label
}()
private let pickupTimeSortTitleLabel: UILabel = {
let label = UILabel()
label.text = "Sort by pickup time:"
label.textAlignment = .left
label.textColor = .white
label.font = UIFont(name: "AvenirNext-DemiBold", size: 18)
label.backgroundColor = .clear
return label
}()
private let driverSortTextField: UITextField = {
let tf = UITextField()
tf.textColor = .black
tf.textAlignment = .center
tf.placeholder = "Louise"
tf.font = UIFont(name: "AvenirNext-DemiBold", size: 15)
tf.backgroundColor = UIColor(white: 0.95, alpha: 1.0)
tf.setWidth(width: 150)
tf.layer.cornerRadius = 5
return tf
}()
private let pickupTimeSortTextField: UITextField = {
let tf = UITextField()
tf.textColor = .black
tf.textAlignment = .center
tf.placeholder = "2:00pm"
tf.font = UIFont(name: "AvenirNext-DemiBold", size: 15)
tf.backgroundColor = UIColor(white: 0.95, alpha: 1.0)
tf.setWidth(width: 150)
tf.layer.cornerRadius = 5
return tf
}()
private enum radioButtonStates {
case driver
case pickupTime
}
private var radioButtonState = radioButtonStates.driver
// MARK: - Lifecycle
override init(frame: CGRect) {
super.init(frame: frame)
configureUI()
}
required init?(coder: NSCoder) {
fatalError("init(coder:) has not been implemented")
}
// MARK: - Selectors
#objc func handleDriverSortRadioButton() {
print("DEBUG: driver sort radio button clicked")
if radioButtonState != .driver {
pickupTimeSortRadioButton.setImage(UIImage(named: "Radio Button - Unselected"), for: .normal)
pickupTimeSortTextField.isEnabled = false
pickupTimeSortTextField.text = ""
radioButtonState = .driver
driverSortRadioButton.setImage(UIImage(named: "Radio Button - Selected"), for: .normal)
driverSortTextField.isEnabled = true
driverSortTextField.text = ""
}
}
#objc func handlePickupTimeSortRadioButton() {
print("DEBUG: pickup time sort radio button clicked")
if radioButtonState != .pickupTime {
driverSortRadioButton.setImage(UIImage(named: "Radio Button - Unselected"), for: .normal)
driverSortTextField.isEnabled = false
driverSortTextField.text = ""
radioButtonState = .pickupTime
pickupTimeSortRadioButton.setImage(UIImage(named: "Radio Button - Selected"), for: .normal)
pickupTimeSortTextField.isEnabled = true
pickupTimeSortTextField.text = ""
}
}
// MARK: - Helper Functions
private func configureUI() {
let driverSortStackView = UIStackView(arrangedSubviews: [driverSortRadioButton,
driverSortTitleLabel,
driverSortTextField])
driverSortStackView.axis = .horizontal
driverSortStackView.distribution = .fill
driverSortStackView.spacing = 5
let pickupTimeSortStackView = UIStackView(arrangedSubviews: [pickupTimeSortRadioButton,
pickupTimeSortTitleLabel,
pickupTimeSortTextField])
pickupTimeSortStackView.axis = .horizontal
pickupTimeSortStackView.distribution = .fill
pickupTimeSortStackView.spacing = 5
let stackView = UIStackView(arrangedSubviews:[driverSortStackView,
pickupTimeSortStackView])
stackView.axis = .vertical
stackView.distribution = .fill
stackView.spacing = 10
self.addSubview(stackView)
stackView.centerX(inView: self)
stackView.centerY(inView: self)
}
}
The functions which are not being called are handleDriverSortRadioButton and handlePickupTimeSortRadioButton. Here is instantiation:
private lazy var sortView = SortView()
and here is where I use it in my parent UIViewController class:
view.addSubview(sortView)
sortView.anchor(top:tableView.bottomAnchor,
left: view.leftAnchor,
right: view.rightAnchor,
paddingTop: 40,
paddingLeft: 32,
paddingRight: 32)

Answer 1

I'm going to guess that the problem is that a containing view (perhaps one of the stack views) has zero size. The result would be that its subviews are visible but not tappable.
Here is a debugging utility method you can use to track down this sort of thing:
extension UIView {
#objc func reportSuperviews(filtering:Bool = true) {
var currentSuper : UIView? = self.superview
print("reporting on \(self)\n")
while let ancestor = currentSuper {
let ok = ancestor.bounds.contains(ancestor.convert(self.frame, from: self.superview))
let report = "it is \(ok ? "inside" : "OUTSIDE") \(ancestor)\n"
if !filtering || !ok { print(report) }
currentSuper = ancestor.superview
}
}
}
Wait until your interface is all set up and the buttons are untappable, and then call that on one of the untappable buttons to get a report in the console.

Answer 2

Fixed it by adding with and height to the bottom stack view
sortView.anchor(top:tableView.bottomAnchor,
left: view.leftAnchor,
right: view.rightAnchor,
paddingTop: 40,
paddingLeft: 32,
paddingRight: 32,
width: view.frame.width,
height: 100)