Error Domain=NSCocoaErrorDomain Code=518 "The file couldn’t be saved because the specified URL type isn’t supported."

Question

p.knausst OP

Created Feb ’17

Replies 8

Boosts 0

Views 20k

Participants 6

Hello, I'm trying to save some Strings in a csv document:

        var tempString = String()
        for Rezept in alleRezepte {
            tempString += "\(Rezept.name), \(Rezept.description), \(Rezept.nutrients), \(Rezept.whatToDo)\n"
        }
        let dirs = (NSSearchPathForDirectoriesInDomains(.documentDirectory, .allDomainsMask, true) as? [String])
        let path = dirs?[0].appending("rezepte.csv")
        let url = URL(string: path!)
        do {
            try tempString.write(to: url!, atomically: true, encoding: String.Encoding.utf8)
        } catch {
            print(error)
        }
        print("Daten gesichert")

And I get this error:

CFURLCopyResourcePropertyForKey failed because it was passed an URL which has no scheme

Error Domain=NSCocoaErrorDomain Code=518 "The file couldn’t be saved because the specified URL type isn’t supported."

How can I fix this?

Thank you for helping.

Answered by QuinceyMorris in 211587022

At the very least, you have a problem in line 6, because you are not ensuring there is a "/" separator between path components. There may also be an issue with a returned path starting with a "~". If it isn't one of those things, then print out the path to see what's wrong with it.

However, the larger issue is that you should stop using path strings at all. There is a FileManager method "urls(for:in:)" that returns URLs directly, and can you the URL addPathComponent method to build the final URL properly.

(It's not that you can't use paths, just that URLs are always preferred these days.)

Boost

Answer 1

QuinceyMorris OP

Feb ’17

Accepted Answer

At the very least, you have a problem in line 6, because you are not ensuring there is a "/" separator between path components. There may also be an issue with a returned path starting with a "~". If it isn't one of those things, then print out the path to see what's wrong with it.

However, the larger issue is that you should stop using path strings at all. There is a FileManager method "urls(for:in:)" that returns URLs directly, and can you the URL addPathComponent method to build the final URL properly.

(It's not that you can't use paths, just that URLs are always preferred these days.)

1

Answer 2

DTS Engineer OP

Apple

Feb ’17

What QuinceyMorris said but also…

The specific cause of your problem is line 7. If you want to go from a path to a file URL, you need to use

URL(fileURLWithPath:)

. What you have,

URL(string:)

, creates a URL with a path component but no scheme, and that’s what’s triggering the specific error you’ve got.

QuinceyMorris’s advice is correct though: life is much easier if you go ‘all in’ on URLs. I just posted an example on your other thread.

Share and Enjoy
—
Quinn “The Eskimo!”
Apple Developer Relations, Developer Technical Support, Core OS/Hardware

let myEmail = "eskimo" + "1" + "@apple.com"

4

Answer 3

p.knausst OP

Feb ’17

If I change line 7 to:

let url = URL(fileURLWithPath: path)

I get this new error:

Error Domain=NSCocoaErrorDomain Code=513 "You don’t have permission to save the file “Documentsrezepte.csv” in the folder “7628BDA0-E8BD-4058-B49F-9A3B70F1FC02”." UserInfo={NSFilePath=/var/mobile/Containers/Data/Application/7628BDA0-E8BD-4058-B49F-9A3B70F1FC02/Documentsrezepte.csv, NSUnderlyingError=0x170055c00 {Error Domain=NSPOSIXErrorDomain Code=1 "Operation not permitted"}}

1

Answer 4

p.knausst OP

Feb ’17

Thanks for the advice to stop using path strings. I'm just getting started with swift programming.

I tried it with the FileManager, but don't get it working.

Could you show me an example of how I'm doing it, so that I can save some Strings in a .csv document?

Mine looks like that:

let dirs = FileManager.default(NSSearchPathForDirectoriesInDomains(for: .documentDirectory, in: .allDomainsMask, true))

I get this error: Cannot call value of non-function type 'FileManager'

That would help me a lot. Thanks.

0

Answer 5

p.knausst OP

Feb ’17

Okay, I got it! No more error!

My code looks like that:

var fileName = "rezepte.csv"
var tempString = String()
        for Rezept in alleRezepte {
            tempString += "\(Rezept.name), \(Rezept.description), \(Rezept.nutrients), \(Rezept.whatToDo)\n"
}


let docDirURL = try! FileManager.default.url(for: .documentDirectory, in: .allDomainsMask, appropriateFor: nil, create: true)
let fileURL = docDirURL.appendingPathComponent(fileName)

try! tempString.write(to: fileURL, atomically: true, encoding: String.Encoding.utf8)

print("Daten gesichert")

Thank you both QuinceyMorris and eskimo!

2

Answer 6

Soumalya OP

Nov ’17

This absolutely solved my issue. Thanks.

-

Soumalya

0

Answer 7

DmitryKanunnikoff OP

Nov ’17

Thank you! Works!

0

Answer 8

CrinaManuela OP

Jan ’22

:)

0