Recently when I was using Xcode 10 beta 3, I tried to make a code snippet and add it to the code snippet library.
But the drag drop cannot be done as the code snippet library is detached in Xcode 10, and hides when I click on a code.
How to add code snippet in code snippet library in Xcode 10?
After some time found out.
Select the code
you want to add to library. Right-click on it and click on Create Code Snippet
from the pop-up menu.
Apparently upto Xcode 9.x.x, this option was not there.