If you look at this nice list of preinstalled fonts that Apple compiled, you'll notice 2 things missing.

iOS and macOS System Fonts

1. Visual representation of the font. (would be nice, Apple)
2. More importantly, the actual font name that you need to use.

As an example, in Xcode/Swift if I want to use Apple SD Gothic Neo Heavy I can't use:

contactNameLabel.font = UIFont(name: "Apple SD Gothic Neo Heavy", size: 13)

I would have to use:

contactNameLabel.font = UIFont(name: "AppleSDGothicNeo-Heavy", size: 13)

Just wanted to see if anyone has a link that shows these names, or otherwise, what the best practice is for easily finding them.

I apologize that my question is not strictly code related. This is my first Stack Overflow question, and I wish it could be more technical, but I think the answer to this could be helpful to people, including myself. Thanks all.