gistfile1.m

NSFileManager* fileManager = [NSFileManager new];
NSURL* directoryURL = [NSURL fileURLWithPath:@"~/photos"];
NSArray* contents = [fileManager contentsOfDirectoryAtURL:directoryURL includingPropertiesForKeys:@[] options:NSDirectoryEnumerationSkipsHiddenFiles error:NULL];
NSPredicate* predicate = [NSPredicate predicateWithFormat:@"pathExtension == 'jpg' OR pathExtension == 'jpeg'"];
	
for (NSURL* fileURL in [contents filteredArrayUsingPredicate:predicate]) {
	NSURL* rawFileURL = [[fileURL URLByDeletingPathExtension] URLByAppendingPathExtension:@"raw"];
	if (![fileManager fileExistsAtPath:[rawFileURL path]]) {
		[fileManager removeItemAtURL:fileURL error:NULL];
	}
}