Setting font on NSAttributedString on UITextView disregards line spacing

Question

I'm trying to set an attributed string to a UITextView in iOS 6. The problem is, if I attempt to set the font property on the attributed string, the line spacing is ignored. However, if I don't set the font, and the default font is used, then line spacing works.

NSString *string = @" Hello \n world";
attrString = [[NSMutableAttributedString alloc] initWithString:string];
NSMutableParagraphStyle *paragraphStyle = [[NSMutableParagraphStyle defaultParagraphStyle] mutableCopy];

paragraphStyle.minimumLineHeight = 50;
// setting the font below makes line spacing become ignored
[attrString addAttribute:NSFontAttributeName value:[UIFont boldSystemFontOfSize:20] range:NSMakeRange(0, string.length)];
[attrString addAttribute:NSParagraphStyleAttributeName value:paragraphStyle range:NSMakeRange(0, string.length)];

mainTextView.attributedText = attrString;

Any idea what's going on?

Are you planning to accept an answer or did no answer help you? :) — Jan Nash, Aug 27 '15 at 12:01
Hey, it would still be cool, if you accepted an answer, if there was one that helped you. — Jan Nash, Jan 24 '19 at 13:57

score 111 · Answer 1 · edited Aug 29 '16 at 12:17

111

Attributed String Programming Guide:

UIFont *font = [UIFont fontWithName:@"Palatino-Roman" size:14.0];
NSDictionary *attrsDictionary = [NSDictionary dictionaryWithObject:font
                                forKey:NSFontAttributeName];
NSAttributedString *attrString = [[NSAttributedString alloc] initWithString:@"strigil" attributes:attrsDictionary];

Update: I tried to use addAttribute: method in my own app, but it seemed to be not working on the iOS 6 Simulator:

NSLog(@"%@", textView.attributedText);

The log seems to show correctly added attributes, but the view on iOS simulator was not display with attributes.

edited Aug 29 '16 at 12:17

mattsson

1,329
1
14
30

answered Nov 09 '12 at 04:13

maxeng

1,282
2
9
11

6

i had the same problem when trying add attribute. I tried your answer and it even didn't work. Any advice?? i think you should edit your answer to UIFont instead of NSFont if we are talking IOS. – iosMentalist Apr 12 '13 at 14:14
6

I don't know why people are voting this answer up. It doesn't fix the actual issue. – Snowman Apr 07 '14 at 20:25
2

This answer is slightly old so use: UIFont * font = [UIFont fontWithName: @"Palatino-Roman" size:14.0] to fix – sam_smith Oct 17 '14 at 04:59
Still not working of course. It seems adding, or even setting attributes has no effect on the attributed string. – Micrified Jan 06 '16 at 15:15
I'm sorry, but this is still not an answer. – Jan Nash Oct 20 '16 at 08:22

Jan Nash · Answer 2 · 2015-07-26T18:11:34.993

I found your question because I was also fighting with NSAttributedString. For me, the beginEditing and endEditing methods did the trick, like stated in Changing an Attributed String. Apart from that, the lineSpacing is set with setLineSpacing on the paragraphStyle.

So you might want to try changing your code to:

NSString *string = @" Hello \n world";
attrString = [[NSMutableAttributedString alloc] initWithString:string];
NSMutableParagraphStyle *paragraphStyle = [[NSMutableParagraphStyle defaultParagraphStyle] mutableCopy];

[paragraphStyle setLineSpacing:20]  // Or whatever (positive) value you like...    
[attrSting beginEditing];

[attrString addAttribute:NSFontAttributeName value:[UIFont boldSystemFontOfSize:20] range:NSMakeRange(0, string.length)];
[attrString addAttribute:NSParagraphStyleAttributeName value:paragraphStyle range:NSMakeRange(0, string.length)];

[attrString endEditing];

mainTextView.attributedText = attrString;

Didn't test this exact code though, btw, but mine looks nearly the same.

EDIT:

Meanwhile, I've tested it, and, correct me if I'm wrong, the - beginEditing and - endEditing calls seem to be of quite an importance.

score 5 · Answer 3 · answered Mar 10 '17 at 06:54

//For proper line spacing

NSString *text1 = @"Hello";
NSString *text2 = @"\nWorld";
UIFont *text1Font = [UIFont fontWithName:@"HelveticaNeue-Medium" size:10];
NSMutableAttributedString *attributedString1 =
[[NSMutableAttributedString alloc] initWithString:text1 attributes:@{ NSFontAttributeName : text1Font }];
NSMutableParagraphStyle *paragraphStyle1 = [[NSMutableParagraphStyle alloc] init];
[paragraphStyle1 setAlignment:NSTextAlignmentCenter];
[paragraphStyle1 setLineSpacing:4];
[attributedString1 addAttribute:NSParagraphStyleAttributeName value:paragraphStyle1 range:NSMakeRange(0, [attributedString1 length])];

UIFont *text2Font = [UIFont fontWithName:@"HelveticaNeue-Medium" size:16];
NSMutableAttributedString *attributedString2 =
[[NSMutableAttributedString alloc] initWithString:text2 attributes:@{NSFontAttributeName : text2Font }];
NSMutableParagraphStyle *paragraphStyle2 = [[NSMutableParagraphStyle alloc] init];
[paragraphStyle2 setLineSpacing:4];
[paragraphStyle2 setAlignment:NSTextAlignmentCenter];
[attributedString2 addAttribute:NSParagraphStyleAttributeName value:paragraphStyle2 range:NSMakeRange(0, [attributedString2 length])];

[attributedString1 appendAttributedString:attributedString2];

score 3 · Answer 4 · edited May 23 '17 at 12:17

3

There was a bug in iOS 6, that causes line height to be ignored when font is set. See answer to NSParagraphStyle line spacing ignored and longer bug analysis at Radar: UITextView Ignores Minimum/Maximum Line Height in Attributed String.

edited May 23 '17 at 12:17

Community

1
1

answered Jul 10 '13 at 15:32

Palimondo

7,281
4
39
58

score 1 · Answer 5 · answered Jul 17 '18 at 08:41

You can use this example and change it's implementation like this:

[self enumerateAttribute:NSParagraphStyleAttributeName
                 inRange:NSMakeRange(0, self.length)
                 options:0
              usingBlock:^(id  _Nullable value, NSRange range, BOOL * _Nonnull stop) {
                  NSMutableParagraphStyle *paragraphStyle = [[NSParagraphStyle defaultParagraphStyle] mutableCopy];

                  //add your specific settings for paragraph
                  //...
                  //...

                  [self removeAttribute:NSParagraphStyleAttributeName range:range];
                  [self addAttribute:NSParagraphStyleAttributeName value:paragraphStyle range:range];
              }];

Setting font on NSAttributedString on UITextView disregards line spacing

5 Answers5

EDIT:

Linked

Related