在iphone / ipad中从opengles上下文生成pdf

Question

Hi am a noob at PDF generation and currently am displaying a 3d bar charts in my application in glview which is in side a uiview. Now i want to generate a PDF document from the uiview which contains a text view and a glview. Am able to generate a PDF from text but where as GL View am unable to proceed.even i tried for a possibility over the net but unable to get any info regarding this.Can someone help me by providing the solution whether this can be possible or not.Thanks in Advance

Answer 1

You can ask any UIView to give you an image (which might be a start) via something like:

- (UIImage *) imageRepresentation {
    // render myself (or more correctly, my layer) to an image
    UIGraphicsBeginImageContext(self.bounds.size);

    CGContextRef context = UIGraphicsGetCurrentContext();
    CGContextSetShouldSmoothFonts(context, false);
    CGContextSetShouldAntialias(context, false);

    [self drawLayer:self.layer inContext:context];
    [self.layer renderInContext:context];

    UIImage *image = UIGraphicsGetImageFromCurrentImageContext();

    UIGraphicsEndImageContext();

    return image;
}

After that, you might be able to get a PDF representation of it, or investigate calls like CGPDFDocumentCreateWithURL to construct one yourself from the image.

Answer 2

You can use CoreGraphic's PDF-APIs to creating and drawing to a PDF.
See Apple's guide for more details.