Programming Tutorials

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Printing in Mac Cocoa Programming

By: Aaron Hillegass in Cocoa Tutorials on 2010年09月24日 [フレーム]

Code to handle printing is always relatively hard to write. Many factors are at play: pagination, margins, and page orientation, or landscape versus portrait.

Compared to most operating systems, Mac OS X makes writing print routines considerably easier. After all, your views already know how to generate PDF, and Mac OS X knows how to print PDF. If you have a document-based application and a view that knows how to draw itself, you simply implement printOperationWithSettings:error:. In this method, you create an NSPrintOperation object using a view and return it. The code, in your NSDocument subclass, would look like this:

- (NSPrintOperation *)printOperationWithSettings:(NSDictionary *)ps
 error:(NSError **)e;
{
 NSPrintInfo *printInfo = [self printInfo];
 NSPrintOperation *printOp
 = [NSPrintOperation printOperationWithView:aView
 printInfo:printInfo];
 return printOp;
}



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