NSString to Unicode

gistfile1.m

- (NSString *)unicodeString:(NSString *)string {
    NSMutableString *retString = [NSMutableString stringWithCapacity:0];
    for (int index = 0; index < [string length]; index++) {
        [retString appendFormat:@"\\u%04x",[string characterAtIndex:index]];
    }
    return retString;
}