Sometimes it can be a pain moving around code in Xcode especially with long method and property names. Then I discovered an Xcode keyboard shortcut that rocks – move back and forward through camel case sub-words!
Use Control→ and Control← to skip through camel case. Hold down shift to highlight as you go:
You may be wondering why this isn’t working on your machine – this does take a tweak to achieve, as the Xcode shortcut is usually usurped by an OS keyboard shortcut preference to move through full screen windows.
If you can handle removing full screen keyboard shortcuts to go left and right (you can just as easily swipe four keys on the trackpad) then open System Preferences > Keyboard > Shortcuts and deactivate the ‘Move left a space’ and ‘Move right a space’ shortcuts:
Alernatively, if you’re not keen on losing those shortcuts, you can always change the shortcut in Xcode – just look for Move Subword Back and MoveSubword Forward in Xcode Key Bindings Preferences.
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... 
I just set up a new Mac and couldn’t figure out why this shortcut wasn’t working. Love that camelcase navigation.