Looking for files that have been modified recently

NSString *directoryPath = <#Get a path to a directory#>;
NSDirectoryEnumerator *directoryEnumerator = [[NSFileManager defaultManager]
enumeratorAtPath:directoryPath];
NSDate *yesterday = [NSDate dateWithTimeIntervalSinceNow:(-60*60*24)];
for (NSString *path in directoryEnumerator) {
if ([[path pathExtension] isEqualToString:@"rtfd"]) {
// Don't enumerate this directory.
[directoryEnumerator skipDescendents];
} else {
NSDictionary *attributes = [directoryEnumerator fileAttributes];
NSDate *lastModificationDate = [attributes
objectForKey:NSFileModificationDate];
if ([yesterday earlierDate:lastModificationDate] == yesterday) {
NSLog(@"%@ was modified within the last 24 hours", path);
} }
}