Picker component unimplemented

[eugbash]

It would be great to have the Picker component on macos that renders the native picker component (https://facebook.github.io/react-native/docs/picker.html).
Do you have any plans to implement this?

[ptmt]

Do you mean https://developer.apple.com/documentation/appkit/nscombobox? As far as I know, I tried to implement it before, need to investigate if it's available.

[eugbash]

Exactly.
Yes, I found it at /Libraries/Picker/PickerIOS.macos.js
I was confused as the render method in /Libraries/Components/Picker/Picker.js returned <UnimplementedView />.

Updating its condition to
if (Platform.OS === 'ios' || Platform.OS === 'macos') {
// $FlowFixMe found when converting React.createClass to ES6
return <PickerIOS {...this.props}>{this.props.children}</PickerIOS>;
}
fixed the issue.

However, NSComboBox seems to render not quite right (please, see the image below).

[ptmt]

Thanks for your feedback!
If you had time to send PR with this (even unfinished) that would be extremely helpful, I'll try to see what's happening with the rendering.