Cannot create PDF document with 400+ pages on iOS

Question

I am using the following pseudocode to generate a PDF document:

CGContextRef context = CGPDFContextCreateWithURL(url, &rect, NULL);

for (int i = 1; i &l         


        

Answer 1

What about using a memory mapped file to back your CG data consumer? Then it doesn't necessarily have to fit in RAM all at once.

I created an example here: https://gist.github.com/3748250

Use it like this:

NSURL * url = [ NSURL fileURLWithPath:@"pdf.pdf"] ;
MemoryMappedDataConsumer * consumer = [ [ MemoryMappedDataConsumer alloc ] initWithURL:url ] ;

CGDataConsumerRef cgDataConsumer = [ consumer CGDataConsumer ] ;

CGContextRef c = CGPDFContextCreate( cgDataConsumer, NULL, NULL ) ;
CGDataConsumerRelease( cgDataConsumer ) ;

// write your PDF to context `c`

CGPDFContextClose( c ) ;
CGContextRelease( c ) ;

return 0;