how to open the url from a .pdf file through xcode programming

开发者_开发百科i'm trying to get the url from a pdf files so that if a user double taps the url on the pdf file, it opens in a new web page.... how can i do it ? any suggestions ? i'm using Xcode 3.2 version.

Apple provide the PDFKit API which you might want to use rather than wrting your own PDF parser.