PDF search on the iPhone

Question

After two days trying to read annotations from a PDF using Quartz, I\'ve managed to do it and posted my code.

Now I\'d like to do the same for another frequently as

Answer 1

So now in iOS 11 we have PDFKit with which searching text is a breeze

if #available(iOS 11.0, *) {
     let pdfDocument = PDFDocument(url: fileUrl)!
     let allText = pdfDocument.string /// Gets all text in pdf separated by /n

     let s: PDFSelection = pdfDocument.findString("Hello", withOptions: [])
     let sWithFormatting = s!.first!.attributedString
}