High quality UIImage from PDF

Question

I\'m converting a PDF page into a UIImage. While doing so, I lose the image quality. Need help in getting high quality images.

Code to generate UIImage

Answer 1

Try this code for Swift 3 :

func drawPDFfromURL(url: URL) -> UIImage? {
    guard let document = CGPDFDocument(url as CFURL) else { return nil }
    guard let page = document.page(at: 1) else { return nil }

    let pageRect = page.getBoxRect(.mediaBox)
    let renderer = UIGraphicsImageRenderer(size: pageRect.size)
    let img1 = renderer.jpegData(withCompressionQuality: 1.0, actions: { cnv in
        UIColor.white.set()
        cnv.fill(pageRect)
        cnv.cgContext.translateBy(x: 0.0, y: pageRect.size.height);
        cnv.cgContext.scaleBy(x: 1.0, y: -1.0);
        cnv.cgContext.drawPDFPage(page);
    })
    let img2 = UIImage(data: img1)
    return img2
}

This gives much higher resolution