让用户在IOS swift中将pdf保存在应用程序之外-移动开发问题

let user save pdf outside app in IOS swift(让用户在IOS swift中将pdf保存在应用程序之外)

本文介绍了让用户在IOS swift中将pdf保存在应用程序之外的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！

问题描述

我制作了一个 PDF 并将其保存在我的应用程序中，但我想让用户将 PDF 文档保存在我的应用程序外部的目录中.(抱歉英语不好，我来自瑞士.)

I Made a PDF an save it in my App, but I want let de user save the PDF document in a directory outside of my app. (Sorry for bad English, I am from Swiss.)

格式化程序中的标记文本，这是不是很重要，我必须使用它?

The markupText in the formatter, ist this something important, that I must use for something?

我认为 - UIGraphicsBeginPDFContextToFile(pathForPDF, rect, nil) - 将文件保存在我的应用程序的文档目录中，对吗?

I think - UIGraphicsBeginPDFContextToFile(pathForPDF, rect, nil) - save the file in the document directory of my app, ist this correct?

其他问题.我的代码中是否有任何错误.我从这里的答案中提取了很多代码，希望我能做对.

Other question. Ist there any mistake in my code. I have taken a lot of code from answers here and hope that im make it right.

import UIKit 
import Foundation

class PdfErstellung {
    static func PdfErstellen(_ auswahlZeilen : [LebensmittelDataTV], _ vitalstoffWerteListe : [LebensmittelDataTV], _ heuteString : String) {
        var html = "<html><head><meta charset='UTF-8'></head><body>Erstelle Vitalstoffwerte PDF</body></html"

        // 1. Create Print Formatter with input text.
        let formatter = UIMarkupTextPrintFormatter(markupText: html)

        // 2. Add formatter with pageRender
        let render = UIPrintPageRenderer()
        render.addPrintFormatter(formatter, startingAtPageAt: 0)

        // 3. Assign paperRect and printableRect

        let page = CGRect(x: 0, y: 0, width: 595.2, height: 841.8) // A4, 72 dpi
        let printable = page.insetBy(dx: 0, dy: 0)
        let rect = CGRect.zero

        render.setValue(NSValue(cgRect: page), forKey: "paperRect")
        render.setValue(NSValue(cgRect: printable), forKey: "printableRect")

        // 4. Create PDF context and draw
        let fileName = "Vitalstoffwerte " + heuteString
        let paths = NSSearchPathForDirectoriesInDomains(.documentDirectory, .userDomainMask, true)
        let documentsDirectory = paths[0]
        let pathForPDF = documentsDirectory.appendingFormat("/" + fileName)

        UIGraphicsBeginPDFContextToFile(pathForPDF, rect, nil)

        // Start Draw of page

        var y = 0

        var stringRechteckX50 = CGRect(x: 50, y: y, width: 100, height: 20)
        var stringRechteckX160 = CGRect(x: 160, y: y, width: 30, height: 20)
        var stringRechteckX170 = CGRect(x: 170, y: y, width: 10, height: 20)
        var stringRechteckX220 = CGRect(x: 220, y: y, width: 100, height: 20)
        var stringRechteckX330 = CGRect(x: 330, y: y, width: 30, height: 20)
        var stringRechteckX340 = CGRect(x: 340, y: y, width: 10, height: 20)

        var paragraphStyle = NSMutableParagraphStyle()

        var font = UIFont(name: "Helvetica Bold", size: 20.0)
        var text = ""

        let attributes = [
            NSAttributedString.Key.paragraphStyle: paragraphStyle,
            NSAttributedString.Key.font: font,
            NSAttributedString.Key.foregroundColor: UIColor.black
        ]

        var attributedString = NSAttributedString(string: text, attributes: attributes)

        // ÜBERSCHRIFT

        font = UIFont(name: "Helvetica Bold", size: 20.0)
        text = "Tagesbedarf in % vom " + heuteString
        paragraphStyle.alignment = .left
        var stringRechteck = CGRect(x: 50, y: 50, width: 300, height: 40)
        attributedString.draw(in: stringRechteck)


        // Vitalstoffwerte Liste

        y = 80

        for zeile in 0..<vitalstoffWerteListe.count {

            let druckenVitalstoffWerte = vitalstoffWerteListe[zeile]

            if druckenVitalstoffWerte.zeilenInfoID == 0 { // Überschrift

                y = y + 10
                font = UIFont(name: "Helvetica Bold", size: 14.0)
                text = druckenVitalstoffWerte.name
                attributedString.draw(in: stringRechteckX50)

            } else { // Detail

                font = UIFont(name: "Helvetica", size: 12.0)
                text = druckenVitalstoffWerte.name
                attributedString.draw(in: stringRechteckX50)

                text = druckenVitalstoffWerte.anzahl
                paragraphStyle.alignment = .right
                attributedString.draw(in: stringRechteckX160)

                text = druckenVitalstoffWerte.masse
                paragraphStyle.alignment = .left
                attributedString.draw(in: stringRechteckX170)

            }
            y = y + 30
        }

        y = 80
        text = "Lebensmittel"
        font = UIFont(name: "Helvetica Bold", size: 14.0)
        paragraphStyle.alignment = .left
        attributedString.draw(in: stringRechteckX220)


        // Lebensmittelliste

        y = 120

        for zeile in 0..<auswahlZeilen.count {

            let auswahlZeilenObjekt = auswahlZeilen[zeile]

            font = UIFont(name: "Helvetica", size: 12.0)
            text = auswahlZeilenObjekt.name
            attributedString.draw(in: stringRechteckX220)

            text = auswahlZeilenObjekt.anzahl
            paragraphStyle.alignment = .right
            attributedString.draw(in: stringRechteckX330)

            text = auswahlZeilenObjekt.masse
            paragraphStyle.alignment = .left
            attributedString.draw(in: stringRechteckX340)

        }
        y = y + 30

         // End Draw of page

        UIGraphicsEndPDFContext()
    }


    // I think the Pdf was saved before, but i do not know exactly
    static func savePdf(_ urlString: String, _ fileName: String) {
        DispatchQueue.main.async {
            let url = URL(string: urlString)
            let pdfData = try? Data.init(contentsOf: url!)
            let resourceDocPath = (FileManager.default.urls(for: .documentDirectory, in: .userDomainMask)).last! as URL
            let pdfNameFromUrl = "YourAppName-(fileName).pdf"
            let actualPath = resourceDocPath.appendingPathComponent(pdfNameFromUrl)
            do {
                try pdfData?.write(to: actualPath, options: .atomic)
                print("pdf successfully saved!")
            } catch {
                print("Pdf could not be saved")
            }
        }
    }
}

---- 编辑 -----

---- Edit -----

我改变了很多.感谢您的链接，我找到了其他链接并有了新的想法.

I have change a lot. Thanks for the link, I found other links and had new ideas.

我的下一个问题是:

Vitalstoffcontroller[6161:165020] [default] [ERROR] 无法确定URL/Users/lukashedinger/Library/Developer/CoreSimulator/Devices/4DE0F1A6-67B7-4909-8C46-78278D403E63/data/Containers/Data/Application/D72F4EE0-D330-4B2D-924E-E17FC805EF55/tmp/Vitalstoffwerte 21092018-21092018.pdf (n) 由文件提供商管理

Vitalstoffcontroller[6161:165020] [default] [ERROR] Failed to determine whether URL /Users/lukashedinger/Library/Developer/CoreSimulator/Devices/4DE0F1A6-67B7-4909-8C46-78278D403E63/data/Containers/Data/Application/D72F4EE0-D330-4B2D-924E-E17FC805EF55/tmp/Vitalstoffwerte 21092018-21092018.pdf (n) is managed by a file provider

我发现了这个，但不明白我的错误是什么.

I found this, but not understand, what my mistake is.

UIActivityViewController 错误:无法确定是否URL 由文件提供者管理

如何将文件保存在文档文件夹中?

(也许是我阅读的 IOS 12 的一个错误:https://forums.developer.apple.com/thread/103198)

(Perhaps is a bug of IOS 12 I read: https://forums.developer.apple.com/thread/103198)

我的新代码

    // 5. Save PDF file

    let dateiName = "Vitalstoffwerte " + heuteString

    let path = "(NSTemporaryDirectory())(dateiName).pdf"



    pdfData.write( toFile: path, atomically: true)

    print("open (path)")


    // var fileUrl: URL = URL(fileURLWithPath: NSTemporaryDirectory())
    // fileUrl.appendPathComponent("foo")
    // fileUrl.appendPathExtension("bar")


    let fileUrl: URL = URL(fileURLWithPath: path)

    let directory = "(NSTemporaryDirectory())"

    let directoryUrl : URL = URL(fileURLWithPath: directory)

    print("open (fileUrl)")
    print("open (directoryUrl)")

    let fm = FileManager.default

    //let fileName = String((fileUrl.lastPathComponent)) as NSString
    //let documentsUrl:URL =  fm.urls(for: .documentDirectory, in: .userDomainMask).first!
    //let destinationFileUrl = documentsUrl.appendingPathComponent("(fileName)")

    //print("open (documentsUrl)")


    //do {
    //    try fm.removeItem(at: destinationFileUrl)
    /

问题描述

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