Document Information           

To edit document information, refer to the following method in the CPDFDocument class.

typedef NSString *CPDFDocumentAttribute NS_STRING_ENUM;
​
extern CPDFDocumentAttribute const CPDFDocumentTitleAttribute;             // NSString containing document title.
extern CPDFDocumentAttribute const CPDFDocumentAuthorAttribute;            // NSString containing document author.
extern CPDFDocumentAttribute const CPDFDocumentSubjectAttribute;           // NSString containing document title.
extern CPDFDocumentAttribute const CPDFDocumentCreatorAttribute;           // NSString containing name of app that created document.
extern CPDFDocumentAttribute const CPDFDocumentProducerAttribute;          // NSString containing name of app that produced PDF data.
extern CPDFDocumentAttribute const CPDFDocumentKeywordsAttribute;          // NSString containing document keywords.
extern CPDFDocumentAttribute const CPDFDocumentCreationDateAttribute;      // NSString representing document creation date.
extern CPDFDocumentAttribute const CPDFDocumentModificationDateAttribute;  // NSString representing last document modification date.
​
/**
* A dictionary of document metadata.
*
* @discussion Metadata is optional for PDF documents. The dictionary may be empty, or only some of the keys may have associated values.
*/
- (NSDictionary<CPDFDocumentAttribute, id> *)documentAttributes;
- (void)setDocumentAttributes:(NSDictionary<CPDFDocumentAttribute, id> *)documentAttributes;