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I need to annotate a PDF in my application. Is there any API for PDF annotation in iPhone/iPad ? Any suggestions?
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Draw and take notes on a PDF file with Apple Pencil.Launch the Acrobat Reader app using the link and open your PDF. Tap the blue pencil icon and select Comment. Select the pencil icon from the bottom toolbar to start the Draw tool. Draw or make notes on the PDF with your Apple Pencil.
Draw, annotate, and use Scribble to turn handwriting into text with an Apple Pencil on iPad. You can also draw and annotate with your finger on iPhone, iPad, or iPod touch. You can also use Select and Scroll with Apple Pencil to select objects and scroll in your document.
You can draw an existing PDF onto a new PDF graphics context and then add whatever you like. See the answer to a similar question for iPhone.
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You could use the PoDoFo Library to add, read or delete the Annotations. But you will need to write your own viewer to display the pdf including the annotations.
I recently wrote a simple viewer for the iPad with the integration of the PoDoFo Library. You can find the very simple sample code on GitHub. There you can work with Square and FreeText annotations.
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