iOS, Swift: Create a PDF file from an HTML string.

iOSCreatePDF.swift

// Thanks to http://www.labs.saachitech.com/2012/10/23/pdf-generation-using-uiprintpagerenderer
// Note: including images in the HTML won't work, see here:
// https://github.com/nyg/HTMLWithImagesToPDF

import UIKit

// 1. Create a print formatter

let html = "<b>Hello <i>World!</i></b>"
let fmt = UIMarkupTextPrintFormatter(markupText: html)

// 2. Assign print formatter to UIPrintPageRenderer

let render = UIPrintPageRenderer()
render.addPrintFormatter(fmt, startingAtPageAt: 0)

// 3. Assign paperRect and printableRect

let page = CGRect(x: 0, y: 0, width: 595.2, height: 841.8) // A4, 72 dpi
render.setValue(page, forKey: "paperRect")
render.setValue(page, forKey: "printableRect")

// 4. Create PDF context and draw

let pdfData = NSMutableData()
UIGraphicsBeginPDFContextToData(pdfData, .zero, nil)

for i in 0..<render.numberOfPages {
    UIGraphicsBeginPDFPage();
    render.drawPage(at: i, in: UIGraphicsGetPDFContextBounds())
}

UIGraphicsEndPDFContext();

// 5. Save PDF file

guard let outputURL = try? FileManager.default.url(for: .documentDirectory, in: .userDomainMask, appropriateFor: nil, create: false).appendingPathComponent("output").appendingPathExtension("pdf")
    else { fatalError("Destination URL not created") }

pdfData.write(to: outputURL, atomically: true)
print("open \(outputURL.path)") // command to open the generated file

Hey,
I think you need to use javascript with your HTML code to load image in web view and then create a pdf
Use evaluateJavaScript() to run javascript in web view

Now all works good! I used link above https://github.com/nyg/HTMLWithImagesToPDF in a wrong way. Image is in the PDF file now. thanks

It should be UIGraphicsBeginPDFContextToData(pdfData, page, nil) instead of UIGraphicsBeginPDFContextToData(pdfData, .zero, nil) to have the correct PDF page size and prevent content from being cut off.