How to add files from a folder to an Xcode project?

Question

Apple Xcode

I'm making a test application in LandMarks in Xcode and I ran into a simple situation that for some reason I can't solve.

1) There is a blueprint of the project and its files arranged in folders.
2) I delete some folder
3) I try to create it and the system does not allow me to create it. Writes that such a folder already exists.

I open the project source and see that yes - there really is a folder with files and at the same time I don’t see it in Xcode. If you put some files in the source folder, Xcode does not see them either.

How can I add them to the project so that xcode can see them?

After the JetBrains product family, it's somehow not obvious.

Answer 1

unlike other ide ixcode does not display or operate on a real file structure.
this allows you to arbitrarily organize the structure / group files in the project without touching the files themselves on disk.
https://help.apple.com/xcode/mac/current/#/dev81ce1d383