ios – Swift TextKit2 get substring from an NSTextRange

I’ve a UITextView and a NSTextRange. How can I get a easy String akin to the vary?

I can solely see uiTextView.textual content(in: UITextRange) however I’m not positive if NSTextRange and UITextRange are even comparable, or map one to the opposite.

Context on why I am attempting to do that:
I’ve some textual content within the UITextView and I need to work out what portion of the textual content did match the body and which portion didn’t. So I do:

let textLayoutManager = textView.textLayoutManager!
let rangeOfRenderedText: NSTextRange = textLayoutManager.textLayoutFragment(for: CGPointZero)!.rangeInElement
let rangeOfRemainderText: NSTextRange = NSTextRange(location: rangeOfRenderedText.endLocation)

let stringThatFit: String = // use rangeOfRenderedText by some means
let stringThatDidNotFit: String = // use rangeOfRemainderText by some means