Copying the bitmap contents of a UIView's context to that of another UIView

Basically what I want to do is copy the already rendered content (a PDF drawn into the UIView's graphics context using CGContextDrawPDFPage()) onto a similar UIView, without having to re render the PDF. The idea is, that I'd then be able to perform an animated transform on the UIView and later re rend开发者_运维问答er the PDF with more accuracy. For both UIViews I'm using a larger-than-screen CATiledLayer to make it easier to rerender the PDF once the user zooms in, if that makes any difference.

Any tips? I'm kind of lost here.

---

Assuming you have rendered a PDF page in a graphics context using code similar to the following

CGPDFDocumentRef document = CGPDFDocumentCreateWithURL (filename_url);
CGPDFPageRef page = CGPDFDocumentGetPage (document, pageNumber); 
CGContextDrawPDFPage (context, page); 
CGPDFDocumentRelease (document);

This code will save the contents of pdfView to a UIImage

UIGraphicsBeginImageContext(pdfView.bounds.size);
[pdfView.layer renderInContext:UIGraphicsGetCurrentContext()];
UIImage *pdfViewImage = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();