Why Xcode code completion for core location classes is not working

Question

I'm new to iOS and I'm trying to build a simple location base app. I have an issue with Xcode 6.1 (6A1046a) which is not showing CoreLocation classes and methods in the code completion.

I've tried to link the CoreLocation framework to the project but it still not working. It's really a pain because I have to check the doc for every constructor or methods.

Here is a screenshot:

I've tried to delete the Derived Data in the organizer (Window > Organiser > Derived Data -> delete) But it's not changing anything and of course I've tried to restart Xcode 10 times. Anyone can help with this issue? Thanks

Answer 1

I've managed to fix this manually deleting all the file in ~/Library/Developer/Xcode/DerivedData

$ rm -Rf ~/Library/Developer/Xcode/DerivedData/* 

And now I get the code completion correctly: