ninjaprox/NVActivityIndicatorView ? reverse-engineered prompt

Build me a Swift iOS component that gives me a bunch of nice loading spinners and animations I can drop into an app.

I want it to work both from code and from Interface Builder, so I can either create it with a frame and set the animation style, color, and padding, or just change the class of a view in a storyboard and configure it there. It should have simple methods to start and stop the animation, and a way to check whether it is currently animating.

Please include a good variety of animation styles, like bouncing balls, spinning shapes, lines, pulsing effects, and a few more creative ones, so it feels like a polished library rather than just one spinner. Make it easy to use in a normal iOS project, and set it up so it could be distributed as a Swift package, CocoaPods, and Carthage compatible library. If you need to, look up current docs or best practices online before finishing.