Swift UIImage als PDF konvertieren

Question

In meiner App müssen UIImage von iPad Gallery zu verkaufen und in PDF konvertieren und auf der Serverseite speichern.

Ich kann das Bild auswählen und es auf Server-Seite senden, aber Backend sagt, dass pdf leer ist (Null-Daten)

ich auch die Warnung/Fehler in meiner Konsole sehen: [Entdeckung] Fehler, die bei Erweiterung entdeckt : Fehler Domain = PlugInKit Code = 13 "Abfrage abgebrochen" UserInfo = {NSLocalizedDescription = Abfrage abgebrochen}

Wohin gehe ich falsch? Vielen Dank im Voraus!

-Code habe ich versucht,

//Opens gallery to select Image 
func clickImage() { 

    let image = UIImagePickerController() 
    image.delegate = self 
    image.sourceType = UIImagePickerControllerSourceType.photoLibrary 
    image.allowsEditing = false 
    self.present(image, animated: true, completion: nil) 

} 

//image picker function 
func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [String : Any]) { 
    if let image = info[UIImagePickerControllerOriginalImage] as? UIImage { 
     scannedPhoto.image = image 
    } else{ 
     print("Something went wrong") 
    } 

    self.dismiss(animated: true, completion: nil) 

    uploadAttachment() 

} 

//Convert UIImage to PDF 
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 
} 

// custom body of HTTP request to upload pdf file 
func createBody(_ parameters: [String: String]?, filePathKey: String?, imageDataKey: Data, boundary: String) -> Data { 

    let body = NSMutableData() 

    if parameters != nil { 
     for (key, value) in parameters! { 
      body.appendString("--\(boundary)\r\n") 
      body.appendString("Content-Disposition: form-data; name=\"\(key)\"\r\n\r\n") 
      body.appendString("\(value)\r\n") 
     } 
    } 

    let filename = "ava.pdf" 

    let mimetype = "pdf" 

    body.appendString("--\(boundary)\r\n") 
    body.appendString("Content-Disposition: form-data; name=\"\(filePathKey!)\"; filename=\"\(filename)\"\r\n") 
    body.appendString("Content-Type: \(mimetype)\r\n\r\n") 
    body.append(imageDataKey) 
    body.appendString("\r\n") 

    body.appendString("--\(boundary)--\r\n") 

    return body as Data 

} 
//Function to send converted pdf server side 
func uploadAttachment() { 


    let pdfdata = createPDF(image: scannedPhoto.image!) 


    // url path to php file 
    let url = URL(string: "\(Config.path)/uploadAva.php")! 

    // declare request to this file 
    var request = URLRequest(url: url) 

    // declare method of passign inf to this file 
    request.httpMethod = "POST" 

    // param to be sent in body of request 
    let param = ["AppId":Config.AppID , "uuid":Config.uuid , "Id" : userId] 

    // body 
    let boundary = "Boundary-\(UUID().uuidString)" 
    request.setValue("multipart/form-data; boundary=\(boundary)", forHTTPHeaderField: "Content-Type") 

    // ... body 
    request.httpBody = createBodyWithParams(param, filePathKey: "file", imageDataKey: pdfdata! as Data, boundary: boundary) 

    // launc session 
    // warning I receive here 
    URLSession.shared.dataTask(with: request) { data, response, error in 
     //do anything here 
    } 
} 

Answer 1

pdf-Datei Daten erstellen:

func createPDFDataFromImage(image: UIImage) -> NSMutableData { 
    let pdfData = NSMutableData() 
    let imgView = UIImageView.init(image: image) 
    let imageRect = CGRect(x: 0, y: 0, width: image.size.width, height: image.size.height) 
    UIGraphicsBeginPDFContextToData(pdfData, imageRect, nil) 
    UIGraphicsBeginPDFPage() 
    let context = UIGraphicsGetCurrentContext() 
    imgView.layer.render(in: context!) 
    UIGraphicsEndPDFContext() 

    //try saving in doc dir to confirm: 
    let dir = FileManager.default.urls(for: .documentDirectory, in: .userDomainMask).last 
    let path = dir?.appendingPathComponent("file.pdf") 

    do { 
      try pdfData.write(to: path!, options: NSData.WritingOptions.atomic) 
    } catch { 
     print("error catched") 
    } 

    return pdfData 
}