I followed it when it was still objective c, and I can only assume it gets better each time. As long as it's still the excellent Paul Hegarthy holding it, just use the latest one.
If you use the Itunes U app on the ipad you'll get all the exercises etc in a nice format. And at least when I did it there was even a special forum for all the MOOC students to discuss the lectures and exercises.
I can't recommend this course enough, it's one of the best I've ever come across, any category.
https://itunes.apple.com/us/course/developing-ios-10-apps-wi...
https://web.stanford.edu/class/cs193p/cgi-bin/drupal/
Swift 4 and iOS 11 are coming soon, but I wouldn't wait for the course to get updated. Downside of it being a university lecture is that it'll be a while.