Can't save file to disk, no clue why

Question

I'm trying to write a string to disk:

return [fileContent writeToFile:path atomically:YES encoding:NSUnicodeStringEncoding error:error];

But it always fails with the following error:

Error Domain=NSCocoaErrorDomain Code=4 "The folder “ddd.csv” doesn’t exist." UserInfo=0xc4a08b0 {NSUnderlyingError=0xc49ba60 "The operation couldn’t be completed. No such file or directory", NSFilePath=file://<path to file>, NSUserStringVariant=Folder}

The path to the file seems to be valid (I've obscured it here) and the string (NSMutableString) is definitely not 0 length. This code used to work before Mountain Lion. Can anyone help shed a light on what could be going on?

Edit: The value of path is: file://localhost/Users/cocoaster/Downloads/ddd.csv

Would help to know what the value of `path` is. And most likely your app is sandboxed so accessing anything outside of that will give you an error. — WrightsCS, Sep 02 '12 at 21:34
Yep, 99% certain that you simply are not providing the right directory. Files need to go into one of the subdirectories of the app's private direcory — Hot Licks, Sep 02 '12 at 21:39
I've added the value of path. I'm running this under Xcode but I don't remember setting up anything in terms of sandboxing. — ruipacheco, Sep 02 '12 at 21:39
That's a URL or URL string not a typical file path. Try /Users/cocoaster/Downloads/ddd.csv — rdelmar, Sep 02 '12 at 21:40
This is supposed to be a path selected by the end user. How can I let my users save to disk? — ruipacheco, Sep 02 '12 at 21:41
Save panel returns aURL not a path. You need to convert to a path [url path] — rdelmar, Sep 02 '12 at 21:43
Perfect. Can you put that into an answer so I can accept it? — ruipacheco, Sep 02 '12 at 21:45

score 5 · Accepted Answer · answered Sep 02 '12 at 21:47

5

Since you're using a save panel the result comes back as a URL, so if you need a path, convert the result to a path with the path command: [url path].

Alternately, you can use writeToURL:atomically: if that version is available for whatever class fileContent is.

answered Sep 02 '12 at 21:47

rdelmar

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URLs are recommended over paths in modern code, and NSStrings do respond to `writeToURL:atomically:encoding:error:`. – Peter Hosey Sep 02 '12 at 23:08

Can't save file to disk, no clue why

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