Which are the pdf operators needed to do a search feature in a PDF in iphone sdk?

Question

I have a been trying to do a search feature in a PDF application. I read the Quartz 2d guide in iphone reference library. And so much has been said about the \"pdf operators

Answer 1

I've been searching for the same thing and today I found this post that has some clues:

http://www.random-ideas.net/posts/42

Looks like the operators are "TJ" and "Tj".