In Swift fileExistsAtPath(_ path: String, isDirectory isDirectory: UnsafeMutablePointer) -> Bool accepts single parameter only

Question

The method fileExistsAtPath() in the example below accept single argument only.

if fm.fileExistsAtPath(result, isDirectory:&isDir) {

The exact error message is: "Extra argument 'isDirectory' in call".

Any idea what's wrong?

Related: https://stackoverflow.com/questions/24696044/nsfilemanager-fileexistsatpathisdirectory-and-swift — Martin R, Aug 19 '18 at 04:18

score 63 · Answer 1 · answered Oct 13 '14 at 11:29

63

The problem is that isDirectory is UnsafeMutablePointer<ObjCBool> and not UnsafeMutablePointer<Bool> you provide. You can use the following code:

var isDir = ObjCBool(false)
if NSFileManager.defaultManager().fileExistsAtPath("", isDirectory: &isDir) {

}

if isDir.boolValue {

}

answered Oct 13 '14 at 11:29

Kirsteins

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On Swift 3 Bool(isDir) is not working for me. isDir.boolValue works fine. Thanks – Marc T. Aug 17 '16 at 06:04
3

This is the solution for Swift 3 – Joe Huang Oct 03 '16 at 00:51

Ian Bytchek · Accepted Answer · 2017-05-11T08:31:05.470

28

Some might find this a little neater. This is Swift 3.

var directory: ObjCBool = ObjCBool(false)
var exists: Bool = FileManager.default.fileExists(atPath: "…", isDirectory: &directory)

if exists && directory.boolValue {
    // Exists. Directory.
} else if exists {
    // Exists.
}

edited May 11 '17 at 08:31

answered Jan 10 '16 at 07:09

Ian Bytchek

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Technically this is not casting, but initialising with `init(_ value: T)`. – Kirsteins Jan 10 '16 at 10:56
When thinking about it you're completely correct, will remark this. – Ian Bytchek Jan 10 '16 at 10:58

score 1 · Answer 3 · answered Mar 08 '16 at 11:08

1

It is

func isDirectory(path: String) -> Bool {
  var isDirectory: ObjCBool = false
  NSFileManager().fileExistsAtPath(path, isDirectory: &isDirectory)
  return Bool(isDirectory)
}

answered Mar 08 '16 at 11:08

onmyway133

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score 0 · Answer 4 · answered Mar 07 '17 at 03:19

0

In Swift3

var isDirectory:ObjCBool = true
var exists = FileManager.default.fileExists(atPath: cachePath, isDirectory: &isDirectory)

answered Mar 07 '17 at 03:19

TanJunHao

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Hello, and welcome to StackOveflow. Please add some explanation to your answer, as code-only answers are not ideal. – Chait Mar 07 '17 at 03:36

score 0 · Answer 5 · answered Nov 14 '17 at 03:35

You can use the following code as an extension . to check if a directory exists or not in Swift 4.0

import Foundation

extension FileManager {

    func directoryExists (atPath path: String) -> Bool {
        var directoryExists = ObjCBool.init(false)
        let fileExists = FileManager.default.fileExists(atPath: path, isDirectory: &directoryExists)

        return fileExists && directoryExists.boolValue
    }
}

score 0 · Answer 6 · answered Dec 15 '20 at 01:28

This is Swift 5.3.

var directoryExists: ObjCBool = ObjCBool(false)
        let fileExists = FileManager.default.fileExists(atPath: path, isDirectory: UnsafeMutablePointer<ObjCBool>(mutating: withUnsafePointer(to: &directoryExists){ $0 }))

It seems like not allowed to check file and directory in the same time.

In Swift fileExistsAtPath(_ path: String, isDirectory isDirectory: UnsafeMutablePointer) -> Bool accepts single parameter only

6 Answers6

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