CODEWITHSUNDEEP
iosswiftpdfswift4ios9
Avineet Gupta
Avineet Gupta

Reputation: 596

Get thumbnail of a PDF file stored in a Remote Location iOS 9 | Swift

I want show thumbnail of a PDF file stored in a server in my UIImageView.

I have target my app for iOS 9 so PDFKit doesn't work for me.

I have also gone through various solutions but none of worked for me. Example - https://stackoverflow.com/a/4768524/4152591

Can anyone here who have gone through similar problem?

Thanks in advance.

Upvotes: 0

Views: 1632

Answers (1)

crcalin
crcalin

Reputation: 1049

private func thumbnailFromPdf(withUrl url: URL, pageNumber: Int = 1, width: CGFloat = 240) enter code here-> UIImage? {
    guard
        let pdf = CGPDFDocument(url as CFURL),
        let page = pdf.page(at: pageNumber)
    else { return nil }

    var pageRect = page.getBoxRect(.mediaBox)
    let pdfScale = width / pageRect.size.width
    pageRect.size = CGSize(width: pageRect.size.width * pdfScale, height: pageRect.size.height * pdfScale)
    pageRect.origin = .zero

    UIGraphicsBeginImageContext(pageRect.size)
    if let context = UIGraphicsGetCurrentContext() {
        context.setFillColor(UIColor.white.cgColor)
        context.fill(pageRect)
        context.saveGState()

        context.translateBy(x: 0.0, y: pageRect.size.height)
        context.scaleBy(x: 1.0, y: -1.0)
        context.concatenate(page.getDrawingTransform(.mediaBox, rect: pageRect, rotate: 0, preserveAspectRatio: true))

        context.drawPDFPage(page)
        context.restoreGState()
    }

    let image = UIGraphicsGetImageFromCurrentImageContext()
    defer { UIGraphicsEndImageContext() }
    return image
}

Upvotes: 2

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