Embed hyperlink in PDF using Core Graphics on iOS

Question

I\'m trying to do a quite simple thing: write an URL inside a PDF file that can be actually clicked by the user.

I know for sure that using libharu it can be done. W

Answer 1

Here is converted code for Swift 5

let context = UIGraphicsGetCurrentContext()
let ctm = context?.ctm

// Translate the origin to the bottom left.
// Notice that 842 is the size of the PDF page. 
ctm?.translatedBy(x: 0.0, y: 842)

// Flip the handedness of the coordinate system back to right handed.
ctm?.scaledBy(x: 1.0, y: -1.0)

var xformRect: CGRect? = nil
if let ctm = ctm {
    xformRect = frameRect.applying(ctm)
}

let url = URL(string: text)
if let url = url {
    UIGraphicsSetPDFContextURLForRect(url, xformRect ?? CGRect.zero)
}

context?.saveGState()

let attributesDict =[
        .foregroundColor: UIColor.blue,
        .underlineStyle: NSUnderlineStyle.single.rawValue
    ]
let attString = NSMutableAttributedString(string: url?.absoluteString ?? "", attributes: attributesDict as? [NSAttributedString.Key : Any])

attString?.draw(in: frameRect)

context?.restoreGState()