I am working on a Swift playground that contains multiple files in the Sources folder alongside the main file. When I type something, for instance, "UI", in the main file, I get the expected autocomplete suggestions. However, when I do the same in files in the Sources folder, I get a "dumb" autocomplete menu as seen in this question: Xcode 9 Autocomplete Not Working 100% - Partially Working
I have tried deleting DerivedData
as suggested in the above question, and have even gone to the lengths of reinstalling Xcode entirely. However, the problem has not gone away. I have created a new playground to ensure it is not specific to this project, and the same problem occurs.
Edit: I just tried the same thing on a different Mac and the same problem was observed. I suppose this is simply a bug in Xcode that has nothing to do with this particular installation or project.