CGContext.DrawPDFPage(CGPDFPage) Method
Definition
Important
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Renders the specified PDF page.
public void DrawPDFPage (CoreGraphics.CGPDFPage page);member this.DrawPDFPage : CoreGraphics.CGPDFPage -> unitParameters
- page
- CGPDFPage
The PDF page to be rendered.
Remarks
The following example shows how to render the first page of a PDF file:
doc = CGPDFDocument.FromFile (Path.Combine (NSBundle.MainBundle.BundlePath, "Images/QuartzImageDrawing.pdf"));
if (doc == null)
throw new Exception ("Could not load document");
using (var ctxt = UIGraphics.GetCurrentContext ()) {
// PDF page drawing expects a Lower-Left coordinate system, so we flip the coordinate system
// before we start drawing.
context.TranslateCTM (0, Bounds.Height);
context.ScaleCTM (1, -1);
// Grab the first PDF page
using (CGPDFPage page = doc.GetPage (1)){
// 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
context.SaveState ();
// 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 = page.GetDrawingTransform (CGPDFBox.Crop, Bounds, 0, true);
// And apply the transform.
context.ConcatCTM (pdfTransform);
// Finally, we draw the page and restore the graphics state for further manipulations!
context.DrawPDFPage (page);
context.RestoreState();
}
}