Function: A CoreGraphics context for PDF specific functions.
This class defines functions to create and get information about a Quartz PDF context. A CGPDFContext object is a type of CGContext that is used for drawing PDF content. The functions in this reference operate only on Quartz PDF graphics contexts created using the functions CGPDFContextCreate or CGPDFContextCreateWithURL.
When you draw to the PDF context using CGContext functions the drawing operations are recorded in PDF format. The PDF commands that represent the drawing are written to the destination specified when you create the PDF graphics context.
Subclass of the CGContextMBS class.