Adding files to Array from Sub Folders

Question

I'm using the following code to add files of a specific extension from a folder to an array.

self.fileArray = try FileManager.default.contentsOfDirectory(at: url, includingPropertiesForKeys: nil).filter{ filterExtensions.contains($0.pathExtension) }

I need to add files from all subfolders within the selected folder/Drive.

How can I achieve this?

Vini App · Accepted Answer · 2017-10-07 06:13:38Z

1

You can get like this :

let enumerator = try FileManager.default.enumerator(at: url, includingPropertiesForKeys: nil)!.allObjects

self.fileArray = enumerator.filter { filterExtensions.contains(($0 as! URL).pathExtension) } as! [URL]

answered Oct 7, 2017 at 6:13

Vini App

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Comments

Leo Dabus · Accepted Answer · 2017-10-08 12:55:12Z

1

You can get url resource key isRegularFileKey to check if the enumerated url is a regular file. You can also set the options to skip hidden files and package descendants, otherwise it will also copy hidden files like .DS_Store:

let documentsDirectory = FileManager.default.urls(for: .documentDirectory, in: .userDomainMask).first!
var files: [URL] = []
FileManager.default.enumerator(at: documentsDirectory, includingPropertiesForKeys: [], options: [.skipsHiddenFiles, .skipsPackageDescendants])?.forEach {
    if let url = $0 as? URL, (try? url.resourceValues(forKeys: [.isRegularFileKey]))?.isRegularFile == true {
        files.append(url)
    }
}

You can also get all objects returned from the enumerator and conditionally cast them into an array of URLs and then filter the URLs which meets the condition:

if let files = (FileManager.default.enumerator(at: documentsDirectory, includingPropertiesForKeys: [], options: [.skipsHiddenFiles, .skipsPackageDescendants])?.allObjects as? [URL])?
    .filter({
      (try? $0.resourceValues(forKeys: [.isRegularFileKey]))?.isRegularFile == true
}) {
   print(files.count)
}

edited Oct 8, 2017 at 12:55

answered Oct 8, 2017 at 3:58

Leo Dabus

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12 Comments

techno Over a year ago

The URL will always be a directory URL .. since I only allow directory selection in NSOpenPanel.

techno Over a year ago

A different question .... My application is taking up 18GB of memory when processing large number of images...Should I explicitly dispose off NSImages?

techno Over a year ago

Let us continue this discussion in chat.

techno Over a year ago

Actually you have forgotten the the filter.

Leo Dabus Over a year ago

Filter for what? Do you need to add all files or just a specific file type?

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