Tutorial for Quick Look Generator not associated with .app

I've checked out Apple's Quick Look Progra开发者_Python百科mming Guide: Introduction to Quick Look page in the Mac Dev Center, but as a more of a science programmer rather than an Apple programmer, it is a little over my head (but I could get through it in a weekend if I bash my head against it long enough).

Does anyone know of a good basic Quick Look Generators tutorial that is simple enough for someone with only very modest experience with Xcode?

For those that are curious, I have a filetype called .evt that has an xml header and then binary info after the header. I'm trying to write a generator to display the xml header. There's no application bundle that it belongs to. Thanks!

---

You might want to start with looking at sample code. Some people learn faster from seeing an example. Here's a generator example:

https://developer.apple.com/library/content/samplecode/QuickLookSketch/Introduction/Intro.html