Write Image To File in Directory

Question

I am getting an error when writing an image file to a directory in Xcode. The function data.writeToFile is returning an error. Here is what I am trying to do:

Get The File Path:

func getPath(fileName: String) -> String {
        let documentURL = NSFileManager.defaultManager().URLsForDirectory(.DocumentDirectory, inDomains: .UserDomainMask)[0]
        let folder = "sampleDirectory"
        return documentURL.URLByAppendingPathComponent(folder).URLByAppendingPathComponent(fileName).path!
    }

Save the Image

func saveImage(image: UIImage, path: String) -> Bool {
        let pngImageData = UIImagePNGRepresentation(image)
        do {
            let success = try pngImageData?.writeToFile(path, options: NSDataWritingOptions.init(rawValue: 0))
        } catch {
            print(error)
        }
        return false
    }

However, there is an error saying:

NSPOSIXErrorDomain - code : 2

Does anyone know what the problem could be?

EDIT Where I call the code:

let fileName = "first_image"
let imagePath = self.getPath(fileName)
let result = self.saveImage(processedImage, path: imagePath)

processedImage is of type UIImage!

I think that he should just create and return a NSURL and use writeToURL — Leo Dabus, Jul 21 '16 at 22:53
@EvgenyKarkan it was not about the error. He is never returning true there. — Leo Dabus, Jul 21 '16 at 22:54
The error is in the catch statement, not in the return of the function. The writeToFile function throws an error. — hockeybro, Jul 21 '16 at 22:55
@MehtaiPhoneApps take a look at this answer on how to append a directory to URL http://stackoverflow.com/a/34701970/2303865 — Leo Dabus, Jul 21 '16 at 22:56
@MehtaiPhoneApps be aware that success is optional Bool there so you need add `== true` — Leo Dabus, Jul 21 '16 at 22:59
NSPOSIXErrorDomain code 2 means - no such file or directory, right? If so - try do debug in that way... — Evgeny Karkan, Jul 21 '16 at 23:02
@LeoDabus your solution did not fix the problem unfortunately. — hockeybro, Jul 21 '16 at 23:05
@EvgenyKarkan do you know what the problem could be? I'm not sure why it is saying this. Do you need to create the file or directory? Is it not automatically created for you when you write to it? — hockeybro, Jul 21 '16 at 23:05
@MehtaiPhoneApps looks like you've never created the folder http://stackoverflow.com/a/27756077/2303865 — Leo Dabus, Jul 21 '16 at 23:06

score 1 · Answer 1 · answered Aug 13 '16 at 13:18

Try creating the directory "sampleDirectory" if it does not exists or don't use a subdirectory. You can check if the directory exists with:

if !NSFileManager.defaultManager().fileExistsAtPath(path) { // create missing directories try! NSFileManager.defaultManager().createDirectoryAtPath(foo, withIntermediateDirectories: true, attributes: nil) }

You also might want to use the option NSDataWritingOptions.DataWritingAtomic which first write to an auxiliary file first and then exchange the files if there were no errors

Write Image To File in Directory

1 Answers1