Xcode: how to add a file to a folder link

Question

I want to add a file to an existing folder in Xcode. I have a folder in the file system that I added to my resources. Now, when I add a file to this folder and try to drag this file into the link to the folder in Xcode, I have no luck.

Even if I delete the link and drag the entire folder again, it does not work, because it imports all the files that were in the folder when I originally imported it, but not new ones.

Any ideas on this?

Answer 1

Drag it to this folder in Finder, then right-click this blue folder in Xcode and then tap it. Or collapse and expand the folder icon (like touching it).