Option Picker Control

[bcylin]

Add an easy to use OptionPickerControl that displays a UIPickerView with given options:

An example type that conforms to OptionDescriptive:

extension String: OptionDescriptive {

  var title: String {
    return self
  }

  static var titleForOptionalValue: String {
    return "(optional)"
  }

}

Initialize OptionPickerControl with CGRect.zero and add it to the view hierarchy:

let optionPicker = OptionPickerControl<String>()
optionPicker.options = [Option<String>.optional(), Option("Option 1"), Option("Option 2")]
optionPicker.addTarget(self, action: #selector(didChangeOption(_:)), for: .valueChanged)
view.addSubview(optionPicker)

To show the UIPickerView:

optionPicker.becomeFirstResponder()

The specified selector didChangeOption(_:) will be called when the selected row in UIPickerView changes.