iPhone CoreText: Find the pixel coordinates of a substring

Question

Here\'s a screenshot of the twitter app for reference: http://screencast.com/t/YmFmYmI4M

What I want to do is place a floating pop-over on top of a substring in an NSAtt

Answer 1

I've been working on a small library that does exactly that. You can find it here: https://github.com/pothibo/CMFramework

However, this library is in its alpha stage, there's optimization needed and some feature are lacking (line height is one of the urgent feature I want to add)

If you decide to use it and find issue, don't hesitate to post issues on github!