How can I scan links in a PDF Document? Do I have to use Quartz? Which methods/functions?
Yes, you need to use Quartz. You have to parse it out from the PDF. This guide can help you.
I recommend reading the PDF specification so you will know what to look for.
The links are stored in the Annotations object so you will need some software to parse those.
来源：https://stackoverflow.com/questions/3717775/how-to-scan-links-in-a-pdf-document