iOS CGContext - PDF margin

[Monaj]

Hi All


I am showing PDF content on a view

using this code using Quartz Sample

 // PDF page drawing expects a Lower-Left coordinate system, so we flip the coordinate system
 // before we start drawing.
 CGContextTranslateCTM(context, 0.0, self.bounds.size.height);
 CGContextScaleCTM(context, 1.0, -1.0);
 
 // Grab the first PDF page
 CGPDFPageRef page = CGPDFDocumentGetPage(pdf, pageNo);
 // We're about to modify the context CTM to draw the PDF page where we want it, so save the graphics state in case we want to do more drawing
 CGContextSaveGState(context);
 // CGPDFPageGetDrawingTransform provides an easy way to get the transform for a PDF page. It will scale down to fit, including any
 // base rotations necessary to display the PDF page correctly. 
 CGAffineTransform pdfTransform = CGPDFPageGetDrawingTransform(page, kCGPDFCropBox, self.bounds, 0, true);
 // And apply the transform.
 CGContextConcatCTM(context, pdfTransform);
 // Finally, we draw the page and restore the graphics state for further manipulations!
 CGContextDrawPDFPage(context, page);
 CGContextRestoreGState(context);

Using this all works fine
I want to set the margin for the PDF context, bydefault it showing 50 px margin in every side..
I have tried CGContext methods but not got the appropriate one.
Can any body help me regarding this


Thanks
Monaj