Using Enumerating over Attributes in a String and underline part of string

NSMutableDictionary *attributesDictionary = [NSMutableDictionary dictionary];
[attributesDictionary setObject:[UIFont systemFontOfSize:14] forKey:NSFontAttributeName];
//[attributesDictionary setObject:[UIColor redColor] forKey:NSForegroundColorAttributeName];
NSMutableAttributedString *attributedString = [[NSMutableAttributedString alloc]initWithString:@"Google www.google.com link" attributes:attributesDictionary];

[attributedString enumerateAttribute:(NSString *) NSFontAttributeName
                            inRange:NSMakeRange(0, [attributedString length])
                            options:NSAttributedStringEnumerationLongestEffectiveRangeNotRequired
                         usingBlock:^(id value, NSRange range, BOOL *stop) {
                             NSLog(@"Attribute: %@, %@", value, NSStringFromRange(range));
                            }];

 NSMutableAttributedString *attributedStr = [[NSMutableAttributedString alloc] initWithString:@"www.google.com "];

 [attributedString addAttribute:NSUnderlineStyleAttributeName
                        value:[NSNumber numberWithInt:NSUnderlineStyleDouble]
                        range:NSMakeRange(7, attributedStr.length)];

 [attributedString addAttribute:NSForegroundColorAttributeName
                        value:[UIColor blueColor]
                        range:NSMakeRange(6,attributedStr.length)];

 _attriLbl.attributedText = attributedString;//_attriLbl (of type UILabel) added in storyboard