title: What is the best way to manipulate an existing PDF-Document under iOS?
body: <p>I need to individualize documents within an iOS-App. I could provide the origin-documents as DOCX, PDF, PPT etc. The output-format has to be PDF.</p>
  
  <p>My minimun requirement is to fill some text-fields. Nice to have would be to replace an image, too.</p>
  
  <p>I´m quite used to generate PDFs programmatically using <code>UIGraphicsBeginPDFContextToFile</code> etc. But in my current case I don´t want to create the whole document programmatically, I just want to replace some content.</p>
  
  <p>Any hints / tipps?</p>
  
  <p>Thank you in advance.</p>