Question

I already get path for documents directory and create some directories inside. I already know how to check if directory exist, delete it or its files but, how could I list directories? Thank you.

for file listing I use:

int Count;
    NSString *path;
    NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
    path = [[paths objectAtIndex:0] stringByAppendingPathComponent:@"SomeDirectoryName"];
    NSArray *directoryContent = [[NSFileManager defaultManager] contentsOfDirectoryAtPath:path error:NULL];
    for (Count = 0; Count < (int)[directoryContent count]; Count++)
    {
        NSLog(@"File %d: %@", (Count + 1), [directoryContent objectAtIndex:Count]);
    }

Answer 1

For example, this method removes all files from temporary directory of application:

- (void)cleatTmpDirectory
{
    // Create a local file manager instance
    NSFileManager *localFileManager = [[NSFileManager alloc] init];
    NSURL *directoryToScan = [NSURL fileURLWithPath:[self applicationTmpDirectory]];

    NSDirectoryEnumerator *dirEnumerator = 
    [[localFileManager enumeratorAtURL:directoryToScan
            includingPropertiesForKeys:[NSArray arrayWithObjects:NSURLIsDirectoryKey,nil]
                               options: NSDirectoryEnumerationSkipsHiddenFiles             |   
      NSDirectoryEnumerationSkipsSubdirectoryDescendants | 
      NSDirectoryEnumerationSkipsPackageDescendants
                          errorHandler:nil] retain];

    NSError *error;
    // Enumerate the dirEnumerator results, each value is stored in allURLs
    for (NSURL *theURL in dirEnumerator)
    {
        // Retrieve whether a directory. 
        NSNumber *isDirectory;
        [theURL getResourceValue:&isDirectory forKey:NSURLIsDirectoryKey error:NULL];

        if ([isDirectory boolValue] == NO)
        {
            [localFileManager removeItemAtURL:theURL error:&error];
        }
    }

    // Release the localFileManager.
    [localFileManager release];
}

As you can find you should use NSDirectoryEnumerator *dirEnumerator and pass to its initialization method appropriate keys that you will then use.