How do we measure the visible borders of text in Cocoa?

Question

None of the methods listed below give exact visible text boundaries in Cocoa. How do we get it?

• NSString boundingRectWithSize:options:attributes:
• NSAttributedString boundingRectWithSize:options:
• NSLayoutManager usedRectForTextContainer:

To illustrate this, here is a screenshot of the result of using the second method above, as shown in this code snippet example .

Answer 1

Here's the solution I have encoded. Any suggestions for improvement are welcome. code snippet: http://pastebin.com/qJMKwvau
Screenshot: http://ScrnSht.com/jskyqs

Answer 2

Actually, from a typographic point of view, the field is correct, but the font exceeds its own border. You can try the NSStringDrawingUsesDeviceMetrics option, which uses glyph borders instead of typographic borders.