Image Rendering

ViewToPDF.swift

import SwiftUI

extension View {
    @MainActor
    func pdf(size: ProposedViewSize) -> Data {
        let renderer = ImageRenderer(content: self)
        renderer.proposedSize = size
        var pdfData = NSMutableData()
        renderer.render { size, render in
            var mediaBox = CGRect(origin: .zero, size: size)
            let consumer = CGDataConsumer(data: pdfData)!
            let pdfContext = CGContext(consumer: consumer, mediaBox: &mediaBox, nil)!
            pdfContext.beginPage(mediaBox: &mediaBox)
            render(pdfContext)
            pdfContext.endPage()
            pdfContext.closePDF()
        }
        return pdfData as Data
    }
}