Getting adjusted to keyboard shortcuts takes some work, but they can boost your productivity significantly. I’ve put together a cheat sheet for a number of frequently used keyboard shortcuts in Xcode 10. I recommend you print it out, stick it on your wall, and in no time you’ll have them committed to memory!
iOS development with Swift - book: https://manning.com/books/ios-development-with-swift video course: https://www.manning.com/livevideo/ios-development-with-swift-lv
Before I forget... 
thank you for sharing this – sharing back something that I discovered lately.
https://www.mediaatelier.com/CheatSheet/