how to know the PDF file name using a CGPDFDictionaryRef object reference

Question

I have an object of type CGPDFDictionaryRef returned somehow from a method that is considered as a part of a static library (so I do not have access to its code to modify it), however, I want to know the name of the PDF file that this dictionary object holds ? how can I query it to get the name of the file?

Answer 1

There are two functions that take a CGPDFDocumentRef and return a CGPDFDictionaryRef. They are CGPDFDocumentGetInfo and CGPDFDocumentGetCatalog. Neither function returns a dictionary that contains the name of the original file. Neither does the array returned by CGPDFDocumentGetID.

This makes sense, because you can create a CGPDFDocumentRef without a file, from data you get over a socket or by drawing into a CGPDFContext with Quartz 2D.

If you want the name of the file, you'll have to get it some other way.