NSFileManager delete contents of directory - cocoa

Question

How do you delete all the contents of a directory without deleting the directory itself? I want to basically empty a folder yet leave it (and the permissions) intact.

Answer 1

E.g. by using a directory enumerator:
NSFileManager *fileManager = [[NSFileManager alloc] init];
NSDirectoryEnumerator *enumerator = [fileManager enumeratorAtPath:path];
NSString *file;
while (file = [enumerator nextObject]) {
NSError *error = nil;
BOOL result = [fileManager removeItemAtPath:[path stringByAppendingPathComponent:file] error:&error];
if (!result && error) {
NSLog(#"Error: %#", error);
}
}
Swift
let fileManager = NSFileManager.defaultManager()
let enumerator = fileManager.enumeratorAtURL(cacheURL, includingPropertiesForKeys: nil, options: nil, errorHandler: nil)
while let file = enumerator?.nextObject() as? String {
fileManager.removeItemAtURL(cacheURL.URLByAppendingPathComponent(file), error: nil)
}

Answer 2

Try this:
NSFileManager *manager = [NSFileManager defaultManager];
NSString *dirToEmpty = ... //directory to empty
NSError *error = nil;
NSArray *files = [manager contentsOfDirectoryAtPath:dirToEmpty
error:&error];
if(error) {
//deal with error and bail.
}
for(NSString *file in files) {
[manager removeItemAtPath:[dirToEmpty stringByAppendingPathComponent:file]
error:&error];
if(error) {
//an error occurred...
}
}

Answer 3

in swift 2.0:
if let enumerator = NSFileManager.defaultManager().enumeratorAtPath(dataPath) {
while let fileName = enumerator.nextObject() as? String {
do {
try NSFileManager.defaultManager().removeItemAtPath("\(dataPath)\(fileName)")
}
catch let e as NSError {
print(e)
}
catch {
print("error")
}
}
}

Answer 4

Swift 2.1.1:
public func deleteContentsOfFolder()
{
// folderURL
if let folderURL = self.URL()
{
// enumerator
if let enumerator = NSFileManager.defaultManager().enumeratorAtURL(folderURL, includingPropertiesForKeys: nil, options: [], errorHandler: nil)
{
// item
while let item = enumerator.nextObject()
{
// itemURL
if let itemURL = item as? NSURL
{
do
{
try NSFileManager.defaultManager().removeItemAtURL(itemURL)
}
catch let error as NSError
{
print("JBSFile Exception: Could not delete item within folder. \(error)")
}
catch
{
print("JBSFile Exception: Could not delete item within folder.")
}
}
}
}
}
}

Answer 5

Swift 3 if anyone needs it for a quick cut/paste
let fileManager = FileManager.default
let fileUrls = fileManager.enumerator(at: folderUrl, includingPropertiesForKeys: nil)
while let fileUrl = fileUrls?.nextObject() {
do {
try fileManager.removeItem(at: fileUrl as! URL)
} catch {
print(error)
}
}

Answer 6

The documentation for contentsOfDirectoryAtPath:error: says:
The search is shallow and therefore does not return the contents of any subdirectories. This returned array does not contain strings for the current directory (“.”), parent directory (“..”), or resource forks (begin with “._”) and does not traverse symbolic links.
Thus:
---( file != #"." && file != #".." )---
is irrelevant.

Answer 7

You can extend the NSFileManager like this:
extension NSFileManager {
func clearFolderAtPath(path: String) -> Void {
for file in subpathsOfDirectoryAtPath(path, error: nil) as? [String] ?? [] {
self.removeItemAtPath(path.stringByAppendingPathComponent(file), error: nil)
}
}
}
Then, you can clear the folder like this: NSFileManager.defaultManager().clearFolderAtPath("the folder's path")

Answer 8

Georg Fritzsche answer for Swift did not work for me. Instead of reading the enumerated object as a String, read it as NSURL.
let fileManager = NSFileManager.defaultManager()
let url = NSURL(string: "foo/bar")
let enumerator = fileManager.enumeratorAtURL(url, includingPropertiesForKeys: nil, options: nil, errorHandler: nil)
while let file = enumerator?.nextObject() as? NSURL {
fileManager.removeItemAtURL(file, error: nil)
}

Answer 9

Why not deleting the whole directory and recreate afterwards? Just get the file attributes and permissions before deleting it, and then recreate it with the same attributes.