How to add a file in the the app’s main bundle ?

I'm interested in learning how to add .sks filename extension in my app's main bundle.

Do you want to add files or to add extensions to files ?

You just need to add a new SpriteKit Scene file in your project.

(sks stands for SpriteKit Scene, I think.)

How to add a file in the the app’s main bundle ?
 
 
Q