Question

How can I get the file creation or last modification date of the file at a particular location, e.g. /Users/MYUSER/Downloads/text.txt?

Answer 1

NSFileManager *fm = [NSFileManager defaultManager];

// Pre-OS X 10.5
NSLog(@"%@", [[fm fileAttributesAtPath:@"input.txt" traverseLink:YES] fileModificationDate]);
[fm changeFileAttributes:[NSDictionary dictionaryWithObject:[NSDate date] forKey:NSFileModificationDate]
              atPath:@"input.txt"];

// OS X 10.5+
NSLog(@"%@", [[fm attributesOfItemAtPath:@"input.txt" error:NULL] fileModificationDate]);
[fm setAttributes:[NSDictionary dictionaryWithObject:[NSDate date] forKey:NSFileModificationDate]
 ofItemAtPath:@"input.txt" error:NULL];

Source: Rosetta Code