문서 폴더의 파일 목록을 가져오는 중

문서 폴더의 파일 목록을 가져오는 중

문서 폴더의 파일 이름을 가져오는 데 사용되는 코드에 어떤 문제가 있습니까?

func listFilesFromDocumentsFolder() -> [NSString]?{
    var theError = NSErrorPointer()
    let dirs = NSSearchPathForDirectoriesInDomains(NSSearchPathDirectory.DocumentDirectory, NSSearchPathDomainMask.AllDomainsMask, true) as? [String]
    if dirs != nil {
        let dir = dirs![0] as NSString
        let fileList = NSFileManager.defaultManager().contentsOfDirectoryAtPath(dir, error: theError) as [NSString]
        return fileList
    }else{
        return nil
    }
}

문서를 올바르게 읽고 문서 폴더에 무엇이 있는지 잘 알고 있는데, "file List"에는 아무것도 표시되지 않습니다."folder"는 폴더의 경로를 나타냅니다.

스위프트 5

do {
    // Get the document directory url
    let documentDirectory = try FileManager.default.url(
        for: .documentDirectory,
        in: .userDomainMask,
        appropriateFor: nil,
        create: true
    )
    print("documentDirectory", documentDirectory.path)
    // Get the directory contents urls (including subfolders urls)
    let directoryContents = try FileManager.default.contentsOfDirectory(
        at: documentDirectory,
        includingPropertiesForKeys: nil
    )
    print("directoryContents:", directoryContents.map { $0.localizedName ?? $0.lastPathComponent })
    for url in directoryContents {
        print(url.localizedName ?? url.lastPathComponent)
    }
    
    // if you would like to hide the file extension
    for var url in directoryContents {
        url.hasHiddenExtension = true
    }
    for url in directoryContents {
        print(url.localizedName ?? url.lastPathComponent)
    }

    // if you want to get all mp3 files located at the documents directory:
    let mp3s = directoryContents.filter(\.isMP3).map { $0.localizedName ?? $0.lastPathComponent }
    print("mp3s:", mp3s)
    
} catch {
    print(error)
}

---

이러한 확장을 프로젝트에 추가해야 합니다.

extension URL {
    var typeIdentifier: String? { (try? resourceValues(forKeys: [.typeIdentifierKey]))?.typeIdentifier }
    var isMP3: Bool { typeIdentifier == "public.mp3" }
    var localizedName: String? { (try? resourceValues(forKeys: [.localizedNameKey]))?.localizedName }
    var hasHiddenExtension: Bool {
        get { (try? resourceValues(forKeys: [.hasHiddenExtensionKey]))?.hasHiddenExtension == true }
        set {
            var resourceValues = URLResourceValues()
            resourceValues.hasHiddenExtension = newValue
            try? setResourceValues(resourceValues)
        }
    }
}

이 솔루션은 Swift 4(Xcode 9.2) 및 Swift 5(Xcode 10.2.1+)와 함께 작동합니다.

let fileManager = FileManager.default
let documentsURL = fileManager.urls(for: .documentDirectory, in: .userDomainMask)[0]
do {
    let fileURLs = try fileManager.contentsOfDirectory(at: documentsURL, includingPropertiesForKeys: nil)
    // process files
} catch {
    print("Error while enumerating files \(documentsURL.path): \(error.localizedDescription)")
}

다음은 결과에 숨겨진 파일을 건너뛰거나 포함할 수 있는 재사용 가능한 FileManager 확장자입니다.

import Foundation

extension FileManager {
    func urls(for directory: FileManager.SearchPathDirectory, skipsHiddenFiles: Bool = true ) -> [URL]? {
        let documentsURL = urls(for: directory, in: .userDomainMask)[0]
        let fileURLs = try? contentsOfDirectory(at: documentsURL, includingPropertiesForKeys: nil, options: skipsHiddenFiles ? .skipsHiddenFiles : [] )
        return fileURLs
    }
}

// Usage
print(FileManager.default.urls(for: .documentDirectory) ?? "none")

SWIFT 3의 짧은 구문

func listFilesFromDocumentsFolder() -> [String]?
{
    let fileMngr = FileManager.default;

    // Full path to documents directory
    let docs = fileMngr.urls(for: .documentDirectory, in: .userDomainMask)[0].path

    // List all contents of directory and return as [String] OR nil if failed
    return try? fileMngr.contentsOfDirectory(atPath:docs)
}

사용 예:

override func viewDidLoad()
{
    print(listFilesFromDocumentsFolder())
}

iOS 10.2 탑재 iPhone 7 및 iOS 9.3 탑재 iPad용 xCode 8.2.3에서 테스트 완료

Apple의 설명:

를 사용하는 것을 검토해 주십시오.FileManager방법들urls(for:in:)그리고.url(for:in:appropriateFor:create:)기본 포맷인 URL을 반환합니다.

---

Swift 5에서는FileManager에는 라고 하는 메서드가 있습니다.contentsOfDirectory(at:includingPropertiesForKeys:options:)에는 다음 선언이 있습니다.

지정된 디렉터리의 얕은 검색을 수행하고 포함된 항목의 URL을 반환합니다.

func contentsOfDirectory(at url: URL, includingPropertiesForKeys keys: [URLResourceKey]?, options mask: FileManager.DirectoryEnumerationOptions = []) throws -> [URL]

---

따라서 문서 디렉토리에 포함된 파일의 URL을 검색하려면 다음 코드 스니펫을 사용할 수 있습니다.FileManager의urls(for:in:)그리고.contentsOfDirectory(at:includingPropertiesForKeys:options:)메서드:

guard let documentsDirectory = FileManager.default.urls(for: .documentDirectory, in: .userDomainMask).first else { return }

do {
    let directoryContents = try FileManager.default.contentsOfDirectory(at: documentsDirectory, includingPropertiesForKeys: nil, options: [])

    // Print the urls of the files contained in the documents directory
    print(directoryContents)
} catch {
    print("Could not search for urls of files in documents directory: \(error)")
}

---

예를 들어,UIViewController다음 구현에서는 앱 번들에서 문서 디렉토리에 파일을 저장하는 방법과 문서 디렉토리에 저장된 파일의 URL을 가져오는 방법을 보여 줍니다.

import UIKit

class ViewController: UIViewController {

    @IBAction func copyFile(_ sender: UIButton) {
        // Get file url
        guard let fileUrl = Bundle.main.url(forResource: "Movie", withExtension: "mov") else { return }

        // Create a destination url in document directory for file
        guard let documentsDirectory = FileManager.default.urls(for: .documentDirectory, in: .userDomainMask).first else { return }
        let documentDirectoryFileUrl = documentsDirectory.appendingPathComponent("Movie.mov")

        // Copy file to document directory
        if !FileManager.default.fileExists(atPath: documentDirectoryFileUrl.path) {
            do {
                try FileManager.default.copyItem(at: fileUrl, to: documentDirectoryFileUrl)
                print("Copy item succeeded")
            } catch {
                print("Could not copy file: \(error)")
            }
        }
    }

    @IBAction func displayUrls(_ sender: UIButton) {
        guard let documentsDirectory = FileManager.default.urls(for: .documentDirectory, in: .userDomainMask).first else { return }

        do {
            let directoryContents = try FileManager.default.contentsOfDirectory(at: documentsDirectory, includingPropertiesForKeys: nil, options: [])

            // Print the urls of the files contained in the documents directory
            print(directoryContents) // may print [] or [file:///private/var/mobile/Containers/Data/Application/.../Documents/Movie.mov]
        } catch {
            print("Could not search for urls of files in documents directory: \(error)")
        }
    }

}

심플하고 역동적인 솔루션 (Swift 5):

extension FileManager {

  class func directoryUrl() -> URL? {
      let paths = FileManager.default.urls(for: .documentDirectory, in: .userDomainMask)
      return paths.first
  }

  class func allRecordedData() -> [URL]? {
     if let documentsUrl = FileManager.directoryUrl() {
        do {
            let directoryContents = try FileManager.default.contentsOfDirectory(at: documentsUrl, includingPropertiesForKeys: nil)
            return directoryContents.filter{ $0.pathExtension == "m4a" }
        } catch {
            return nil
        }
     }
     return nil
  }}

이 코드는 내 문서 디렉토리에 있는 모든 디렉토리와 파일을 출력합니다.

일부 기능 수정:

func listFilesFromDocumentsFolder() -> [String]
{
    let dirs = NSSearchPathForDirectoriesInDomains(FileManager.SearchPathDirectory.documentDirectory, FileManager.SearchPathDomainMask.allDomainsMask, true)
    if dirs != [] {
        let dir = dirs[0]
        let fileList = try! FileManager.default.contentsOfDirectory(atPath: dir)
        return fileList
    }else{
        let fileList = [""]
        return fileList
    }
}

호출자:

    let fileManager:FileManager = FileManager.default
    let fileList = listFilesFromDocumentsFolder()

    let count = fileList.count

    for i in 0..<count
    {
        if fileManager.fileExists(atPath: fileList[i]) != true
        {
            print("File is \(fileList[i])")
        }
    }

Swift 2.0 호환성

func listWithFilter () {

    let fileManager = NSFileManager.defaultManager()
           // We need just to get the documents folder url
    let documentsUrl = fileManager.URLsForDirectory(.DocumentDirectory, inDomains: .UserDomainMask)[0] as NSURL

    do {
    // if you want to filter the directory contents you can do like this:
    if let directoryUrls = try? NSFileManager.defaultManager().contentsOfDirectoryAtURL(documentsUrl, includingPropertiesForKeys: nil, options: NSDirectoryEnumerationOptions.SkipsSubdirectoryDescendants) {
        print(directoryUrls)
       ........
        }

    }

}

또는

 func listFiles() -> [String] {

    var theError = NSErrorPointer()
    let dirs = NSSearchPathForDirectoriesInDomains(NSSearchPathDirectory.DocumentDirectory, NSSearchPathDomainMask.AllDomainsMask, true) as? [String]
    if dirs != nil {
        let dir = dirs![0]
        do {
        let fileList = try NSFileManager.defaultManager().contentsOfDirectoryAtPath(dir)
        return fileList as [String]
        }catch {

        }

    }else{
        let fileList = [""]
        return fileList
    }
    let fileList = [""]
    return fileList

}

언급URL : https://stackoverflow.com/questions/27721418/getting-list-of-files-in-documents-folder