连接：http://www.danandcheryl.com/2010/05/how-to-print-a-pdf-file-using-cocoa
Mac OS X is well known for its great support for PDF files. You can create a PDF file from anything you can print. I thought that using Apple’s PDFKit framework would make it easy to program a way to print an existing PDF file. That turned out not to be the case.
Sending a file to a printer using the lp command is easy. However, this approach does not work for PDF files formatted for landscape printing. You can specify landscape orientation, but I wanted a way to detect the orientation automatically.
PDFKit has a PDFView object that has a printWithInfo:autoRotate: method. However, adding aPDFDocument to a PDFView and telling it to print doesn’t work. I eventually stumbled onto the fact thatPDFDocumenthas a secret method that makes printing easy. So here is the code:
#import <Quartz/Quartz.h>- (void)printPDF:(NSURL *)fileURL {// Create the print settings.NSPrintInfo *printInfo = [NSPrintInfo sharedPrintInfo];[printInfo setTopMargin:0.0];[printInfo setBottomMargin:0.0];[printInfo setLeftMargin:0.0];[printInfo setRightMargin:0.0];[printInfo setHorizontalPagination:NSFitPagination];[printInfo setVerticalPagination:NSFitPagination];// Create the document reference.PDFDocument *pdfDocument = [[[PDFDocument alloc] initWithURL:fileURL] autorelease];// Invoke private method.// NOTE: Use NSInvocation because one argument is a BOOL type. Alternately, you could declare the method in a category and just call it.BOOL autoRotate = YES;NSMethodSignature *signature = [PDFDocument instanceMethodSignatureForSelector:@selector(getPrintOperationForPrintInfo:autoRotate:)];NSInvocation *invocation = [NSInvocation invocationWithMethodSignature:signature];[invocation setSelector:@selector(getPrintOperationForPrintInfo:autoRotate:)];[invocation setArgument:&printInfo atIndex:2];[invocation setArgument:&autoRotate atIndex:3];[invocation invokeWithTarget:pdfDocument];// Grab the returned print operation.NSPrintOperation *op = nil;[invocation getReturnValue:&op];// Run the print operation without showing any dialogs.[op setShowsPrintPanel:NO];[op setShowsProgressPanel:NO];[op runOperation];
}
I consider this code to be in the public domain. Please feel free to copy and paste. And let me know if you find any problems or have suggestions.