Add an annotation on a pdf

Question

I have to develop a iPad app which can view a PDF file and draw some predefined annotations on it dynamically. It's like http://plangrid.com/ do.

I went though WWDC videos, stackoverflow and some other blogs.

But could not find a way to add a controller bar on the PDF. And drag a annotation from it and drop on the PDF.

I have an idea about to view a PDF. I followed ZoomingPDFViewer example.

Please advise me.

I'm using XCode 4 and iOS 4.3.

Answer 1

I'm not sure if you found the following stackoverflow post: Annotate PDF within iPhone SDK

The first answer shows how to add text to a pdf page at a given location. This should be helpful for your purposes.