save UIImage as pdf file

UIImage_to_pdf.swift

//: Playground - noun: a place where people can play

import UIKit

let a = #imageLiteral(resourceName: "hot.png")

func createPDF(image: UIImage) -> NSData? {
 
    let pdfData = NSMutableData()
    let pdfConsumer = CGDataConsumer(data: pdfData as CFMutableData)!
    
    var mediaBox = CGRect.init(x: 0, y: 0, width: image.size.width, height: image.size.height)
    
    let pdfContext = CGContext(consumer: pdfConsumer, mediaBox: &mediaBox, nil)!
    
    pdfContext.beginPage(mediaBox: &mediaBox)
    pdfContext.draw(image.cgImage!, in: mediaBox)
    pdfContext.endPage()

    return pdfData
}

let documentDirectory = FileManager.default.urls(for: .documentDirectory, in: .userDomainMask).first!
let docURL = documentDirectory.appendingPathComponent("myFileName.pdf")
print(docURL)
try createPDF(image: a)?.write(to: docURL, atomically: true)