how to sort file from nsdocumentdirectory by their name?

Question

I have some files in nsdocumentdirectory,when I fetched those file its returns the file with random position.I am using this following code:

NSString *downloadDirectory = [Utility bookDownloadFolder];
NSString *bookFolder = [[_selectedBook.zipFile lastPathComponent] stringByDeletingPathExtension];
NSString *bookFolderFinal = [downloadDirectory stringByAppendingPathComponent:bookFolder];
NSMutableArray *retval = [NSMutableArray array];
NSFileManager *fileManager = [NSFileManager defaultManager];
NSError *error = nil;
NSArray *files = [fileManager contentsOfDirectoryAtPath:bookFolderFinal error:&error];

and the output is like this :

files("1.jpg","1.txt","10.jpg","10.txt""11.jpg","11.txt","12.jpg","12.txt","13.jpg","13.txt","2.jpg","2.txt", "3.jpg","3.txt","4.jpg","4.txt","5.jpg","5.txt","6.jpg","6.txt" "7.jpg","7.txt", "__MACOSX" )

But I want the output in ascending order like : files("1.jpg","1.txt","2.jpg","2.txt",)

If I use localizedCaseInsensitiveCompare to sort the array,it is not working in this case,if I use localizedCaseInsensitiveCompare then the output is like this only.( "__MACOSX", "1.jpg", "1.txt", "10.jpg", "10.txt", "11.jpg", "11.txt", "12.jpg", "12.txt", "13.jpg", "13.txt", "2.jpg", "2.txt", "3.jpg", "3.txt", "4.jpg", "4.txt", "5.jpg", )

Possible duplicate of [How to sort a NSArray alphabetically?](http://stackoverflow.com/questions/1351182/how-to-sort-a-nsarray-alphabetically) — Droppy, Jul 22 '16 at 13:33
No localizedCaseInsensitiveCompare is not working in this case,if I use localizedCaseInsensitiveCompare then the output is like this only.( "__MACOSX", "1.jpg", "1.txt", "10.jpg", "10.txt", "11.jpg", "11.txt", "12.jpg", "12.txt", "13.jpg", "13.txt", "2.jpg", "2.txt", "3.jpg", "3.txt", "4.jpg", "4.txt", "5.jpg", ) — A.T, Jul 22 '16 at 13:37
You want [this one](http://stackoverflow.com/questions/11075644/sort-nsmutablearray-with-strings-that-contain-numbers) then. However you need to make your mind up; do you want it numerical or not? — Droppy, Jul 22 '16 at 13:38
No what I write is the out put currently I got..But with this [myArray sortUsingComparator:^NSComparisonResult(NSString *str1, NSString *str2) { return [str1 compare:str2 options:(NSNumericSearch)]; }]; code its working now — A.T, Jul 22 '16 at 13:42

score 3 · Answer 1 · answered May 25 '18 at 02:56

Extending and updating Oleg's answer, for Swift 4:

The documentation for contentsOfDirectory(at:) states that the order of the returned URLs is "undefined". I'm not sure many developers expected that, but anyway...

The first job is to get the file URLs:

let maybeURLs = try? FileManager.default.contentsOfDirectory(
        at: rootURL,
        includingPropertiesForKeys: [.isDirectoryKey],
        options: [.skipsSubdirectoryDescendants, .skipsHiddenFiles])

guard let urls = maybeURLs else { return }

Now we have to sort the URLs like the Finder does.

In this case, since we know all the files belong to the same directory, we can compare using only the lastPathComponent(which, happily, is a string.)

You could extend the comparison logic to ignore suffixes (.txt vs .jpg), etc.

let sortedURLs = urls.sorted { a, b in
    return a.lastPathComponent
        .localizedStandardCompare(b.lastPathComponent)
            == ComparisonResult.orderedAscending
}

Print the results:

sortedURLs.forEach { print($0.lastPathComponent) }

1 Foo.txt
10 Bar.txt
100 Baz.txt
200 Boo.txt
210 Moo.txt

score 2 · Answer 2 · answered Jul 22 '16 at 13:45

Swift example to solve youre issue:

let testArray = ["1.jpg","1.txt","10.jpg","10.txt","11.jpg","11.txt","12.jpg","12.txt","13.jpg","13.txt","2.jpg","2.txt", "3.jpg","3.txt","4.jpg","4.txt","5.jpg","5.txt","6.jpg","6.txt", "7.jpg","7.txt"]

let sortedArray = testArray.sort({ x, y in
    return x.localizedStandardCompare(y) == NSComparisonResult.OrderedAscending
})


print(sortedArray)
//"["1.jpg", "1.txt", "2.jpg", "2.txt", "3.jpg", "3.txt", "4.jpg", "4.txt", "5.jpg", "5.txt", "6.jpg", "6.txt", "7.jpg", "7.txt", "10.jpg", "10.txt", "11.jpg", "11.txt", "12.jpg", "12.txt", "13.jpg", "13.txt"]

score 1 · Accepted Answer · edited Jul 22 '16 at 13:45

1

[NSSortDescriptor sortDescriptorWithKey:@"self" 
ascending:YEScomparator:^(NSString * string1, NSString * string2){ 
return [string1 compare:string2 options:NSNumericSearch]; 
}];

edited Jul 22 '16 at 13:45

Bhumit Mehta

16,278
11
50
64

answered Jul 22 '16 at 13:44

Subhojit Das

26
3

score 0 · Answer 4 · answered Jul 22 '16 at 13:47

0

NSMutableArray *myArray = [NSMutableArray arrayWithObjects:@"4", @"2", @"7", @"8", nil]; //sorting [myArray sortUsingComparator:^NSComparisonResult(NSString *str1, NSString *str2) { return [str1 compare:str2 options:(NSNumericSearch)]; }]; //logging NSLog(@"%@", myArray);

answered Jul 22 '16 at 13:47

Subhojit Das

26
3

Why are you posting multiple answers? – Droppy Jul 22 '16 at 13:48

how to sort file from nsdocumentdirectory by their name?

4 Answers4