cocoa touch 에서의 간단한 pdf 핸드링

@interface MMPDFView : UIView {

CGPDFDocumentRef pdfDoc;

}

- (void)loadPDF:(NSURL *)url;

- (void)drawPdfPage:(int)page context:(CGContextRef)ctxt area:(CGRect)vrect isZoom:(BOOL)isZoom;

@end

@implementation MMPDFView

- (void)loadPDF:(NSURL *)url

{

if(pdfDoc != nil)

CGPDFDocumentRelease(pdfDoc);

pdfDoc = CGPDFDocumentCreateWithURL((CFURLRef)url);

[self setNeedsDisplay];

}

- (void)drawPdfPage:(int)page context:(CGContextRef)ctxt area:(CGRect)vrect

{

CGContextSetFillColorWithColor(ctxt, [UIColor whiteColor].CGColor);

CGContextFillRect(ctxt, self.frame);

int maxPage = CGPDFDocumentGetNumberOfPages(pdfDoc);

if(page > 0 && currentPage <= maxPage)

{

CGPDFPageRef pdfPage = CGPDFDocumentGetPage(pdfDoc, page);

CGRect pageRect = CGPDFPageGetBoxRect(pdfPage, kCGPDFCropBox);

double hRate = vrect.size.width / pageRect.size.width;

double xstd = 0, ystd = pageRect.size.height * hRate;

if(pageRect.size.height * hRate <= vrect.size.height)

ystd = pageRect.size.height * hRate + (vrect.size.height - pageRect.size.height * hRate) / 2;

if(pageRect.size.width * hRate < vrect.size.width)

xstd = (vrect.size.width - pageRect.size.width * hRate) / 2;

CGContextTranslateCTM(ctxt, xstd, ystd);

CGContextScaleCTM(ctxt, hRate, -hRate);

CGContextSaveGState(ctxt);

CGContextDrawPDFPage(ctxt, pdfPage);

CGContextRestoreGState(ctxt);

}

}

- (void)drawRect:(CGRect)rect

{

if(pdfDoc == nil)

return;

CGContextRef ctxt = UIGraphicsGetCurrentContext();

[self drawPdfPage:0 context:ctxt area:self.frame];

}

- (id)initWithFrame:(CGRect)frame {

    if ((self = [super initWithFrame:frame])) {

        [self loadPDF:파일경로];

    }

    return self;

}

- (void)dealloc {

if(pdfDoc != nil)

CGPDFDocumentRelease(pdfDoc);

    [super dealloc];

}

@end