OS X / iOS: How do I create a PDF that can't get printed?

Question

I want to create a PDF document, that can't get printed. I am using the Quartz framework for that. This is what I do (shorted):

    PDFDocument *pdfDocument = ...

    NSMutableDictionary *options = [[NSMutableDictionary alloc] init];
    [options setValue:@"test-password" forKey:(NSString *)kCGPDFContextUserPassword];
    [options setValue:@0 forKey:(NSString *)kCGPDFContextAllowsPrinting];

    [pdfDocument writeToFile:savePath withOptions:options];

But I can still print the resulting file with Preview.app without having to type in a password.

If I set a kCGPDFContextOwnerPassword, the document is locked with the password (but not the print function)

What am I doing wrong?

Thanks!

CGPDFContext Reference

Answer 1

After using CFMutableDictionaryRef instead of NSMutableDictionary, it finally works. Don't ask me why... :D

Answer 2

Set kCGPDFContextAllowsPrinting value to kCFBooleanFalse but by The default value of this key is kCFBooleanTrue.

Whether the document allows printing when unlocked with the user password.