'NSRangeException', reason: '*** -[NSBigMutableString characterAtIndex:]: Index 1258 out of bounds; string length 1176'

Question

NSString *htmlString = [NSString stringWithFormat:@"<html> <head><style type=\"text/css\">body {         font-family: Mehr Nastaliq Web; font-size: 22pt; white-space: pre-wrap;  text-align: right;  lang: ar; direction: RTL; -webkit-user-select: none; }</style>     </head><body leftmargin=\"20\" topmargin=\"0\" rightmargin=\"20\" > %@  </body></html>",str];
NSAttributedString *attributedString = [[NSAttributedString alloc] initWithData: [htmlString dataUsingEncoding:NSUnicodeStringEncoding]  options: @{ NSDocumentTypeDocumentAttribute:NSHTMLTextDocumentType }  documentAttributes: nil error: nil];
self.txtView.attributedText=attributedString;

@jaydev Please, add some example of `str` that would crash the code. — Sulthan, May 16 '18 at 07:00
It is not being crashed for every urdu text. I tried with `تم کیسی ہو؟` so please add an example text which will crash the code. — TheTiger, May 16 '18 at 07:19
Adding `` in ` <\head>` tag showing correct result. I read it [here](https://github.com/webpack/webpack-dev-server/issues/1) and this is my [example file](https://pastebin.com/8KGxPSJp). — TheTiger, May 16 '18 at 07:50

PPL · Accepted Answer · 2018-05-16T07:26:08.977

2

Can you please try below, Just try it and let me know it is working or not.

NSAttributedString * attributedString = [[NSAttributedString alloc] initWithData:[htmlString dataUsingEncoding:NSUTF8StringEncoding]
                                                                       options:@{NSDocumentTypeDocumentAttribute:NSHTMLTextDocumentType}
                                                            documentAttributes:nil
                                                                         error:nil];

If you are uncertain of the correct encoding you should use NSUTF8StringEncoding

UPDATE

NSString *htmlString = @"<html><head><style type=\"text/css\">body { font-family: Mehr Nastaliq Web; font-size: 22pt; white-space: pre-wrap; text-align: right; lang: en; direction: RTL; -webkit-user-select: none; meta charset=\"UTF-8\" }</style> </head><body leftmargin=\"20\" topmargin=\"0\" rightmargin=\"20\"> مُدّعا عَنقا ہے اپنے عالَمِ تقریر کا میری تقریر کا مفہوم چونکہ عنقا یعنی معدوم ہے اور معدوم </body></html>";
NSAttributedString *attributedString = [[NSAttributedString alloc] initWithData: [htmlString dataUsingEncoding:NSUnicodeStringEncoding]  options: @{ NSDocumentTypeDocumentAttribute:NSHTMLTextDocumentType }  documentAttributes: nil error: nil];
_txtView.attributedText = attributedString;

It is working perfectly with NSUnicodeStringEncoding.

edited May 16 '18 at 07:26

answered May 16 '18 at 06:39

PPL

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Please, explain the difference between Unicode and UTF8 encoding if possible. – Sulthan May 16 '18 at 06:43
You can visit [this](https://stackoverflow.com/questions/643694/what-is-the-difference-between-utf-8-and-unicode) – PPL May 16 '18 at 06:44
I know the difference but it should be part of the answer. Also it's not clear from your answer why a specific encoding (UTF8) must be used. – Sulthan May 16 '18 at 06:49
Hi @PPL i have try this code but now text is not displaying in Urdu format . and text is not readable . – jaydev May 16 '18 at 06:56
1

@jaydev Does your font support it? Did you load the text properly? – Sulthan May 16 '18 at 07:00
@jaydev Also, you should have `` in your html. – Sulthan May 16 '18 at 07:03
Hi @PPL i have include [NSString stringWithFormat:@" %@ ",str]; but still its showing wrong string format . – jaydev May 16 '18 at 07:09
@jaydev as Sulthan said, Please, add some example of str that would crash the code – PPL May 16 '18 at 07:10
hi @PPL مُدّعا عَنقا ہے اپنے عالَمِ تقریر کا میری تقریر کا مفہوم چونکہ عنقا یعنی معدوم ہے اور معدوم – jaydev May 16 '18 at 07:14
@jaydev give me some time please – PPL May 16 '18 at 07:15
Let us [continue this discussion in chat](https://chat.stackoverflow.com/rooms/171129/discussion-between-ppl-and-jaydev). – PPL May 16 '18 at 07:27
Adding `` in ` <\head>` tag showing correct result. I read it [here](https://github.com/webpack/webpack-dev-server/issues/1) and this is my [example file](https://pastebin.com/8KGxPSJp). – TheTiger May 16 '18 at 07:48
OK Thanks @PPL for support – jaydev May 16 '18 at 09:02

score 0 · Answer 2 · answered Sep 11 '18 at 21:11

I'm also seeing a crash, even in the most basic of examples. I was able to track it do doing it when creating UICollectionViewCells for a UICollectionView. When I pulled it out and ran is prior to updating the list, it worked fine...exact same code.

There seems to be a bug inside iOS related to this, at least is cases when it's called inside a UICollectionViewDataSource:collectionView:cellForItemAtIndexPath:

score 0 · Answer 3 · answered Apr 10 '20 at 03:43

It needs to add character encoding in Option dict the same as the string encode. Otherwise. It will be unreadable code.

NSAttributedString.DocumentReadingOptionKey.characterEncoding:String.Encoding.utf8.rawValue

the whole code is

let htmlString = """
    <html><head><style type=\"text/css\">body { font-family: Mehr Nastaliq Web; font-size: 22pt; white-space: pre-wrap; text-align: right; lang: en; direction: RTL; -webkit-user-select: none; meta charset=\"UTF-8\" }</style> </head><body leftmargin=\"20\" topmargin=\"0\" rightmargin=\"20\"> hello world! Arabic.<br/> مُدّعا عَنقا ہے اپنے عالَمِ تقریر کا میری تقریر کا مفہوم چونکہ عنقا یعنی معدوم ہے اور معدوم </body></html>
    """

    let attributedString = try? NSAttributedString(data:
        htmlString.data(using: String.Encoding.utf8)!, options: [NSAttributedString.DocumentReadingOptionKey.documentType: NSAttributedString.DocumentType.html, NSAttributedString.DocumentReadingOptionKey.characterEncoding:String.Encoding.utf8.rawValue], documentAttributes: nil)
    textView.attributedText = attributedString

You also can change the string encoding and the attribute encoding at the same time. The result will be readable, too. Such as unicode.

let attributedString = try? NSAttributedString(data:
                   htmlString.data(using: String.Encoding.unicode)!, options: [NSAttributedString.DocumentReadingOptionKey.documentType: NSAttributedString.DocumentType.html, NSAttributedString.DocumentReadingOptionKey.characterEncoding:String.Encoding.unicode.rawValue], documentAttributes: nil)
               textView.attributedText = attributedString

'NSRangeException', reason: '*** -[NSBigMutableString characterAtIndex:]: Index 1258 out of bounds; string length 1176'

3 Answers3