iOS: how to change colour/font of some characters of a string - ios

Question

in my app i have to change the font of a part of string which comes from JSON response
> "<span class=\"drop_data_user\">Andrew James</span> liked your comment
> \"hiiiiiiiiiiiiiii\" that you posted."
to convert it in attributed string i am using the following code
NSAttributedString *attr = [[NSAttributedString alloc] initWithData:[NotificationTxt dataUsingEncoding:NSUTF8StringEncoding]
options:#{NSDocumentTypeDocumentAttribute: NSHTMLTextDocumentType,
NSCharacterEncodingDocumentAttribute:#(NSUTF8StringEncoding)}
documentAttributes:nil
error:nil];
I want to change the font colour of the sender

Answer 1

Also, you can use it as follows.
NSString *dateString = [NSString stringWithFormat:#"%#%#", #"Teslimat: ", selectedReservationModel.DateLabel];
NSMutableAttributedString *attrS = [[NSMutableAttributedString alloc] initWithString: dateString];
[attrS addAttribute:NSFontAttributeName value:[GenericUtility getOpenSansBoldFontSize:12] range:NSMakeRange(0, 8)];
[attrS addAttribute:NSFontAttributeName value:[GenericUtility getOpenSansRegularFontSize:12] range:NSMakeRange(9, selectedReservationModel.DateLabel.length)];
lblDeliveryDate.attributedText = attrS;

Answer 2

NSMutableAttributedString *attrS = [[NSMutableAttributedString alloc] initWithString:#"My String"];
[attrS addAttribute:NSForegroundColorAttributeName value:[UIColor redColor] range:NSMakeRange(0, 2)];
[attrS addAttribute:NSForegroundColorAttributeName value:[UIColor greenColor] range:NSMakeRange(3, 6)];
self.myLabel.attributedText = attrS;
For fonts use
[attrS addAttribute:NSFontAttributeName value:[UIFont boldSystemFontOfSize:20] range:NSMakeRange(0, 3)];

Answer 3

I believe the easiest way to fulfil your task is to use CSS inlined in the text, then parsing HTML as you do will change the color too (I'm using Swift syntax, but I believe you can easily convert it to ObjC):
let text = "<span class=\"drop_data_user\">Andrew James</span> liked your comment \"hiiiiiiiiiiiiiii\" that you posted."
let colouredAuthorText = "\(text)<style>.drop_data_user { color: #FEB600; }</style>"
Then just parse colouredAuthorText (which is created by appending style to the original text) instead of the original, and you should be good to go.