【Swift】その URL が ファイル なのか ディレクトリ なのか 存在しないのか 👉 https://android.benigumo.com/20240605/resource-values/

URLEx.swift

extension URL {
//  private var resourceIsDirectory: Bool? {
//    (try? resourceValues(forKeys: [.isDirectoryKey]))?.isDirectory
//  }

  var exists: Bool {
//    resourceIsDirectory != nil
//    (try? resourceValues(forKeys: [.isDirectoryKey]))?.isDirectory != nil
//    (try? resourceValues(forKeys: [.isRegularFileKey]))?.isRegularFile != nil
    isFile || isDirectory
  }

  var isFile: Bool {
//    resourceIsDirectory == false
//    (try? resourceValues(forKeys: [.isDirectoryKey]))?.isDirectory == false
    (try? resourceValues(forKeys: [.isRegularFileKey]))?.isRegularFile == true
  }

  var isDirectory: Bool {
//    resourceIsDirectory == true
//    (try? resourceValues(forKeys: [.isRegularFileKey]))?.isRegularFile == false
    (try? resourceValues(forKeys: [.isDirectoryKey]))?.isDirectory == true
  }
}