I have a similar question that when layout, some attributes of NSAttributedString make no effect and some others make effects not expected, so how to deal with them? In my app, I need to increase the line space in paragraphs. Therefore, I set the paragraphStyle like this let paragraphStyle = NSMutableParagraphStyle() paragraphStyle.alignment = .justified paragraphStyle.lineHeightMultiple = 1.6 paragraphStyle.paragraphSpacing = defaultFontSize * 2.0 paragraphStyle.hyphenationFactor = 1           for range in allMyRanges { attributedString.removeAttribute(NSAttributedString.Key.paragraphStyle, range: range) attributedString.addAttribute(NSAttributedString.Key.paragraphStyle, value: paragraphStyle, range: range) } When layout, all paragraphs with this paragraphStyle had the wrong frames and were also half covered by the paragraphs following them, like this: Is there a way to control the frame of layoutFragments?

I figured out a clumsy way to convert NSTextRange to NSRange, of cause by researching the development documents for ages. let offset = textContentStorage!.offset(from: textLayoutManager!.documentRange.location, to: textRange.location) let length = textContentStorage!.offset(from: textRange.location, to: textRange.endLocation) let nsRange = NSRange(location: offset, length: length)