I know neither. I'd skip Objective-C and learn Swift to actually make a thing. If you want general language knowledge, a really hairy production language and

I know neither. I'd skip Objective-C and learn Swift to actually make a thing. If you want general language knowledge, a really hairy production language and toolset isn't the place to look. You'll be fighting with lots of incidental stuff along the way. Learning different kinds of languages will help you learn more languages.