UILabel doesn't show inputView

Question

I would use a UILabel to allow users to select a date with UIDatePicker.

To do this, I created an UILabel subclass overwriting the inputView and the inputAccessoryVi

Answer 1

Here is the UILabel that shows PickerView, in Swift 4

final class DatePickerLabel: UILabel {
  private let pickerView: UIPickerView
  private let toolbar: UIToolbar

  required init(pickerView: UIPickerView, toolbar: UIToolbar) {
    self.pickerView = pickerView
    self.toolbar = toolbar
    super.init(frame: .zero)

    let recogniser = UITapGestureRecognizer(target: self, action: #selector(tapped))
    addGestureRecognizer(recogniser)
  }

  required init?(coder aDecoder: NSCoder) {
    fatalError()
  }

  override var inputView: UIView? {
    return pickerView
  }

  override var inputAccessoryView: UIView? {
    return toolbar
  }

  override var canBecomeFirstResponder: Bool {
    return true
  }

  @objc private func tapped() {
    becomeFirstResponder()
  }
}