Ignore .DS_Store and Icon files in a folder with Cocoa NSFIleManager

Question

I\'m trying to remove specific files from a directory using NSFileManager. I would like to ignore the hidden .DS_Store and Icon files (the folder that I\'m checking has to h

Answer 1

The filename of a folder's custom icon resource is "Icon\r" (Icon, followed by a carriage return).

What I generally do when enumerating a directory in which I want to skip invisible items (those whose name starts with a "."), is to check for a prefix of @".":

NSMutableArray *fullPaths = [NSMutableArray array];

NSFileManager *fileManager = [[[NSFileManager alloc] init] autorelease];

NSArray *subpaths = [fileManager subpathsAtPath:filePath];

for (NSString *subpath in subpaths) {
   if ( ![[subpath lastPathComponent] hasPrefix:@"."] && 
        ![[subpath lastPathComponent] isEqualToString:@"Icon\r"]) {
        [fullPaths addObject:[filePath stringByAppendingPathComponent:subpath]];
   }
}
// continue

The above code will work in 10.5 and later, (or even 10.0, I believe, if you changed the fast enumeration to use an NSEnumerator).

P.S. If you are creating your NSFileManager using +defaultManager, then you shouldn't use the [manager release] line, as that would be over-releasing.

So, instead of:

NSFileManager *manager = [NSFileManager defaultManager];
// 
[manager release];

do

NSFileManager *manager = [[NSFileManager alloc] init];
//
[manager release];

or

NSFileManager *manager = [NSFileManager defaultManager];
//