Search for all txt files in directory - Swift

Question

a. How should I get all the txt files in directory?

i got a path of directory and now i should find all the txt files and change every one a little.

i try to run over all the files:

let fileManager = NSFileManager.defaultManager()
let enumerator:NSDirectoryEnumerator = fileManager.enumeratorAtPath(folderPath)
while let element = enumerator?.nextObject() as? String {

    }
}

but I stuck there. How can I check if the filetype is text?

b. When i get to a directory (in the directory I run), I want get in and search there too, and in the end get out to the place I was and continue.

a is much more important to me but if I get an answer to b too it will be nice.

Jay Mehta · Accepted Answer · 2017-02-13 14:29:49Z

15

a. Easy and simple solution for Swift 3:

let enumerator = FileManager.default.enumerator(atPath: folderPath)
let filePaths = enumerator?.allObjects as! [String]
let txtFilePaths = filePaths.filter{$0.contains(".txt")}
for txtFilePath in txtFilePaths{
    //Here you get each text file path present in folder
    //Perform any operation you want by using its path
}

Your task a is completed by above code.

When talking about b, well you don't have to code for it because we are here using a enumerator which gives you the files which are inside of any directory from your given root directory.

So the enumerator does the work for you of getting inside a directory and getting you their paths.

answered Feb 13, 2017 at 14:29

Jay Mehta

1,84119 silver badges21 bronze badges

Sign up to request clarification or add additional context in comments.

Comments

Sandeep · Accepted Answer · 2016-02-24 20:47:57Z

8

You can use for .. in syntax of swift to enumerate through NSEnumerator.

Here is a simple function I wrote to extract all file of some extension inside a folder.

func extractAllFile(atPath path: String, withExtension fileExtension:String) -> [String] {
    let pathURL = NSURL(fileURLWithPath: path, isDirectory: true)
    var allFiles: [String] = []
    let fileManager = NSFileManager.defaultManager()
    if let enumerator = fileManager.enumeratorAtPath(path) {
        for file in enumerator {
            if let path = NSURL(fileURLWithPath: file as! String, relativeToURL: pathURL).path
                where path.hasSuffix(".\(fileExtension)"){
                allFiles.append(path)
            }
        }
    }
    return allFiles
}



let folderPath = NSBundle.mainBundle().pathForResource("Files", ofType: nil)
let allTextFiles = extractAllFile(atPath: folder!, withExtension: "txt") // returns file path of all the text files inside the folder

answered Feb 24, 2016 at 20:47

Sandeep

21.2k7 gold badges68 silver badges109 bronze badges

1 Comment

user5976686 Over a year ago

i not with swift right now but it seems its gonna work thanks. there is an extension for windows folders? its even considered as file in the enumerator?

Dani.Rangelov · Accepted Answer · 2016-12-01 09:20:18Z

7

I needed to combine multiple answers in order to fetch the images from a directory and I'm posting my solution in Swift 3

func searchImages(pathURL: URL) -> [String] {
    var imageURLs = [String]()
    let fileManager = FileManager.default
    let keys = [URLResourceKey.isDirectoryKey, URLResourceKey.localizedNameKey]
    let options: FileManager.DirectoryEnumerationOptions = [.skipsPackageDescendants, .skipsSubdirectoryDescendants, .skipsHiddenFiles]

    let enumerator = fileManager.enumerator(
        at: pathURL,
        includingPropertiesForKeys: keys,
        options: options,
        errorHandler: {(url, error) -> Bool in
            return true
    })

    if enumerator != nil {
        while let file = enumerator!.nextObject() {
            let path = URL(fileURLWithPath: (file as! URL).absoluteString, relativeTo: pathURL).path
            if path.hasSuffix(".png"){
                imageURLs.append(path)
            }
        }
    }

    return imageURLs
}

and here is a sample call

let documentsDirectory = FileManager.default.urls(for:.documentDirectory, in: .userDomainMask)[0]
let destinationPath = documentsDirectory.appendingPathComponent("\(filename)/")

searchImages(pathURL: projectPath)

answered Dec 1, 2016 at 9:20

Dani.Rangelov

3662 silver badges5 bronze badges

1 Comment

Maury Markowitz Over a year ago

This works very well in the latest versions of Swift and I strongly recommend it.

Þorvaldur Rúnarsson · Accepted Answer · 2017-10-19 18:06:43Z

7

Swift 4

let documentsPath = NSSearchPathForDirectoriesInDomains(.documentDirectory, .userDomainMask, true)[0]
let url = URL(fileURLWithPath: documentsPath)

let fileManager = FileManager.default
let enumerator: FileManager.DirectoryEnumerator = fileManager.enumerator(atPath: url.path)!
while let element = enumerator.nextObject() as? String, element.hasSuffix(".txt") {
    // do something

}

answered Oct 19, 2017 at 18:06

Þorvaldur Rúnarsson

8877 silver badges16 bronze badges

1 Comment

Lucas P. Over a year ago

You have an error in your code, the element.hasSuffix() will stop the while loop on the first non .txt file it finds. So a solution would be to use the following loop:

while let element = enumerator.nextObject() as? String { 					guard file.hasSuffix(".txt") else { continue } /*use the element here*/  }

Zaqira · Accepted Answer · 2016-05-21 17:22:58Z

4

let fileManager = NSFileManager.defaultManager()
let enumerator:NSDirectoryEnumerator = fileManager.enumeratorAtPath(folderPath!)!
while let element = enumerator.nextObject() as? String {
    if (element.hasSuffix(".txt")) { // element is a txt file }
}

answered May 21, 2016 at 17:22

Zaqira

411 bronze badge

1 Comment

Bhavesh Odedra Over a year ago

Generally, answers are much more helpful if they include an explanation of what the code is intended to do, and why that solves the problem without introducing others

some_id · Accepted Answer · 2016-02-24 20:44:18Z

3

let fileManager = NSFileManager.defaultManager()
let enumerator:NSDirectoryEnumerator = fileManager.enumeratorAtPath(folderPath)
while let element = enumerator?.nextObject() as? String where element.pathExtension == "txt" {
    // element is txt file
}

answered Feb 24, 2016 at 20:44

some_id

29.9k64 gold badges190 silver badges309 bronze badges

Collectives™ on Stack Overflow

Search for all txt files in directory - Swift

6 Answers 6

Comments

1 Comment

1 Comment

1 Comment

1 Comment

Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

6 Answers 6

Comments

1 Comment

1 Comment

1 Comment

1 Comment

Comments

Your Answer

Sign up or log in

Post as a guest

Related