2
2

More than 1 year has passed since last update.

【Swift・PDFKit】文字列・画像をPDF化する方法

Posted at

文字列・画像をPDF化

以下のコードはサイズとPDF化したい文字列、画像を受け取り、PDFをData型に変換して返す処理になります。
Data型で返しているので、返り値をそのままActivityViewControllerに渡せば、それでPDFの共有ができます。
調べるのにちょっと手こずったので備忘録として残しておきます。

import UIKit
import PDFKit

class PDFUtils {
    var pdfData = NSMutableData()
    var render = UIPrintPageRenderer()
    let a3Width: CGFloat = 841.8
    let a3Height: CGFloat = 1190.5
    let a4Width: CGFloat = 595.2
    let a4Height: CGFloat = 841.8
    let a5Width: CGFloat = 419.5
    let a5Height: CGFloat = 595.2
    let b3Width: CGFloat = 1031.8
    let b3Height: CGFloat = 1459.8
    let b4Width: CGFloat = 728.5
    let b4Height: CGFloat = 1031.8
    let b5Width: CGFloat = 515.9
    let b5Height: CGFloat = 728.5

    func createPDFfromImages(images: [UIImage], size: String) -> Data {
        let pdfData = NSMutableData()
        for index in 0..<images.count {
            UIGraphicsBeginPDFContextToData(pdfData, getPDFPageFrame(size: size), nil)
            UIGraphicsBeginPDFPageWithInfo(getPDFPageFrame(size: size), nil)
            guard let pdfContext = UIGraphicsGetCurrentContext() else { return Data() }
            let imageView = UIImageView(frame: getPDFPageFrame(size: size))
            imageView.image = images[index]
            imageView.contentMode = .scaleAspectFit
            imageView.layer.render(in: pdfContext)
            UIGraphicsEndPDFContext()
        }
        return pdfData as Data
    }

    func createPDFfromString(size: String, text: String) -> Data {
        render = UIPrintPageRenderer()
        render.addPrintFormatter(UIMarkupTextPrintFormatter(markupText: text), startingAtPageAt: 0)
        render.setValue(getPDFPageFrame(size: size), forKey: "paperRect")
        render.setValue(getPDFPageFrame(size: size), forKey: "printableRect")

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

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

        UIGraphicsEndPDFContext()
        return pdfData as Data
    }
    
    private func getPDFPageFrame(size: String) -> CGRect {
        switch size {
        case "A3": return CGRect(x: 0, y: 0, width: a3Width, height: a3Height)
        case "A4": return CGRect(x: 0, y: 0, width: a4Width, height: a4Height)
        case "A5": return CGRect(x: 0, y: 0, width: a5Width, height: a5Height)
        case "B3": return CGRect(x: 0, y: 0, width: b3Width, height: b3Height)
        case "B4": return CGRect(x: 0, y: 0, width: b4Width, height: b4Height)
        case "B5": return CGRect(x: 0, y: 0, width: b5Width, height: b5Height)
        default: return CGRect(x: 0, y: 0, width: a4Width, height: a4Height)
        }
    }
}
2
2
0

Register as a new user and use Qiita more conveniently

  1. You get articles that match your needs
  2. You can efficiently read back useful information
  3. You can use dark theme
What you can do with signing up
2
2