Save incoming PDF in WebView to Memory - ios

Question

I have a project that is associated with opening PDF files. This is set in the Info.plist. When I get a PDF attachment in email, I can hold my finger on the PDF attachment and then 'Open in' in my app. In my AppDelegate, I have the following added:
func application(app: UIApplication, openURL url: NSURL, options: [String : AnyObject]) -> Bool {
incomingTransfer = URL
return true
}
incomingTransfer is a Global Variable declared in another ViewController as an NSURL. This ViewController also has a UIWebView and the incomingTransfer loads into it and I'm able to see the new PDF file. My goal is to have a button that allows the user to save the incoming PDF as a PDF. I'm having trouble with this. I thought I had it all figured out, but it wasn't saving as a PDF at all, but rather as a String. Can someone help me please? My goal is to save the incoming PDF file as a PDF to the app memory, preferably in DocumentDirectory. I have a hard time trying to convert Objective C to Swift. My original code to save it was:
let html = String(incomingFileTransfer)
let fmt = UIMarkupTextPrintFormatter(markupText: html)
let render = UIPrintPageRenderer()
render.addPrintFormatter(fmt, startingAtPageAtIndex: 0)
let page = CGRect(x: 0, y: 0, width: 595.2, height: 841.8) // A4, 72 dpi
let printable = CGRectInset(page, 0, 0)
render.setValue(NSValue(CGRect: page), forKey: "paperRect")
render.setValue(NSValue(CGRect: printable), forKey: "printableRect")
let pdfData = NSMutableData()
UIGraphicsBeginPDFContextToData(pdfData, CGRectZero, nil)
for i in 1...render.numberOfPages() {
UIGraphicsBeginPDFPage();
let bounds = UIGraphicsGetPDFContextBounds()
render.drawPageAtIndex(i - 1, inRect: bounds)
}
UIGraphicsEndPDFContext();
recipeFileName = fileName.text!
print("File Name Entered: \(recipeFileName)")
let documentsPath = NSSearchPathForDirectoriesInDomains(.DocumentDirectory, .UserDomainMask, true)[0]
pdfData.writeToFile("\(documentsPath)/\(recipeFileName).pdf", atomically: true)

Answer 1

I figured it out. I created a class called 'PDFFile'. Within 'PDFFile' are two variables, named var name: String and var url: NSURL. Within my 'IncomingTransfer' ViewController, I have the 'save' button create and save the new file with a typed name from the UITextField and the incomingURL specified in my AppDelegate is assigned to the url variable. Both are then saved to the PDFFile class using NSCoding. I then set a UITableView for it's dataSource from the PDFFile Class array data. I created a segue when the user clicks on the UITableViewCell and that goes to a new ViewController with a UIWebView. This WebView loads the PDF from a urlRequest using the specified url variable, saved from the NSCoding.
AppDelegate Code:
// Allows incoming file access (PDF)
func application(app: UIApplication, openURL url: NSURL, options: [String : AnyObject]) -> Bool {
// Transfer incoming file to global variable to be read
if url != "" {
// Load from Mail App
incomingFileTransfer = url
incomingStatus = "Incoming"
} else {
// Regular Load
print("App Delegate: No incoming file")
incomingFileTransfer = nil
}
return true
}
IncomingFile code and save button code:
// MARK: Properties
var file: PDFFile?
// MARK: Actions
// Save Button
let name = fileName.text ?? ""
let url = incomingFileTransfer
file = PDFFile(name: name, url: url)
// MARK: NSCoding
func saveFiles() {
let isSuccessfulSave = NSKeyedArchiver.archiveRootObject(pdfFiles, toFile: PDFFile.ArchiveURL.path!)
if !isSuccessfulSave {
print("Failed to save PDF file")
}
}
Viewing Saved Incoming PDF Later ViewController code:
// MARK: Properties
#IBOutlet weak var pdfItemWebView: UIWebview!
var incomingURL: NSURL!
// Within ViewDidLoad
if let file = file {
pdfFileName.text = file.name
incomingURL = file.url
print("Saved URL: \(incomingURL)")
print("Pending load...")
let request = NSURLRequest(URL: incomingURL!)
pdfItemWebView.loadRequest(request)
}
It was complicated but worked for me. There may be an easier way, but this is what I figured out and its works for my needs.