View using DefaultRadioButton

MyViewUsingDefaultRadioButton.swift

class MyView: UIView, RadioButtonDelegate {
  let radioButton = DefaultRadioButton()
  
  override init(frame: CGRect) {
    super.init(frame: frame)
    radioButton.delegate = self
  }
  
  .
  .
  .
  
  func onClick(_ sender: UIView) {
    guard let sender = sender as? DefaultRadioButton else {
      return
    }
    radioButton.isChecked = !radioButton.isChecked
    // Take note of which radioButtons are selected if you need here.
    // Possibly unselect the other radio buttons if this is a single choice question for e.g.
  }
}