How to edit and load tile maps in Swift?

Question

I work in a scroller with the Sprite Kit. I want to create different levels, but I don’t know how to edit, save and load level maps.

I found a good answer on how to store level information in a plist file. Storing Sprite Set Level Data I think it’s not very difficult to save all nodes in the plist file and load them. However, I still have to create my own left editor, and I'm not sure if I want to do this.

Any thoughts?