How can I create a PDF file programmatically in an iOS application?

Question

How to generate a PDF file on a user action?

Answer 1

As an example of creating a PDF from the contents of a CALayer, you can refer to the -dataForPDFRepresentationOfLayer method within the CPLayer class in the Core Plot framework. You can do something similar to extract the content from a CALayer-backed UIView, although we had to subclass CALayer in order to get vector elements to render to a PDF properly.