How to get height for NSAttributedString at a fixed width

Question

I want to do some drawing of NSAttributedStrings in fixed-width boxes, but am having trouble calculating the right height they\'ll take up when drawn. So far, I\'ve tried:

Answer 1

Not a single answer on this page worked for me, nor did that ancient old Objective-C code from Apple's documentation. What I finally did get to work for a UITextView is first setting its text or attributedText property on it and then calculating the size needed like this:

let size = textView.sizeThatFits(CGSize(width: maxWidth, height: CGFloat.max))

Works perfectly. Booyah!