The bold `<b>` tag and the Italic `<i>` tag do not apply to custom font families

Question

I got a string htmlwith <b>and tags <i>.

inputString = @"<b> Sample bold text </b> Normal Text <i> sample italic </i>";

And below the method returns the attribute text for entering the html string.

+(NSAttributedString *) returnRichTextForString:(NSString *) inputString {

  NSMutableAttributedString *attributedString = [[NSMutableAttributedString alloc] initWithData:[inputString dataUsingEncoding:NSUTF8StringEncoding]  options:@{   
        NSDocumentTypeDocumentAttribute:  NSHTMLTextDocumentType,
        NSCharacterEncodingDocumentAttribute: @(NSUTF8StringEncoding)
      }
  documentAttributes:nil
  error:nil];

   return attributedString;
}

Then custom font size, family and pass it to the method described above.

NSString * strigAfterFontWrapper =  [NSString stringWithFormat:@"<style type='text/css'> body {font-size: %fpx}</style><font face='%@'>%@</font>", fontSize , customFontFamily, inputString];

label.numberOfLines = 0;

NSAttributedString *attributedstring = [NTUtilities returnRichTextForString:strigAfterFontWrapper];

label.attributedText = attributedstring;

But, <b>and <i>do not apply on the label!

It works great with the default system font! Any clue why it fails in case of custom fonts? What should I include to receive boldoritalic

Answer 1

. , , iOS. , Bold/Italic .., . , .

:

+(NSAttributedString *) returnRichTextForString:(NSString *) inputString NSAttributedString.

[attributedString beginEditing];

[attributedString enumerateAttribute:NSParagraphStyleAttributeName inRange:NSMakeRange(0, attributedString.length) options:0 usingBlock:^(id value, NSRange range, BOOL *stop) {
    if (value) {
        NSMutableParagraphStyle *myStyle = (NSMutableParagraphStyle *)value;
        //Hack for bold effect to custom fonts
        if (myStyle.minimumLineHeight == 101) {
            [myStyle setMinimumLineHeight:0];
            [attributedString addAttribute:NSStrokeWidthAttributeName
                                     value:[NSNumber numberWithFloat:-3.0] range:range];
        }
        //Hack for italic/skew effect to custom fonts
        if (myStyle.minimumLineHeight == 99) {
            [myStyle setMinimumLineHeight:0];
            [attributedString addAttribute:NSObliquenessAttributeName
                                     value:[NSNumber numberWithFloat:0.30] range:range];
        }

    }
}];

[attributedString endEditing];

inputString

<style type='text/css'> b { line-height:101px;} i {line-height:99px;} </style>

, ,

inputString = @"<b> Sample bold text </b> Normal Text <i> sample italic </i><style type='text/css'> b { line-height:101px;} i {line-height:99px;} </style>";

Trick - line-height html minimumLineHeight . , 101 99, .

: , . , . , , , NSAttributedstring,

//Hack for bold effect.
[attributedString enumerateAttribute:NSStrikethroughStyleAttributeName inRange:NSMakeRange(0, attributedString.length) options:0 usingBlock:^(id value, NSRange range, BOOL *stop) {

    if (value) {

        [attributedString addAttribute:NSStrokeWidthAttributeName
                                                 value:[NSNumber numberWithFloat:-3.0] range:range];

        [attributedString addAttribute:NSStrikethroughStyleAttributeName
                                 value:[NSNumber numberWithFloat:0.0] range:range];
    }

}];

html,

 b { text-decoration:line-through;}

:

  +(NSAttributedString *) returnRichTextForString:(NSString *) inputString {

  NSMutableAttributedString *attributedString = [[NSMutableAttributedString alloc] initWithData:[inputString dataUsingEncoding:NSUTF8StringEncoding]  options:@{
                                                                                                                                                                 NSDocumentTypeDocumentAttribute:  NSHTMLTextDocumentType,
                                                                                                                                                                 NSCharacterEncodingDocumentAttribute: @(NSUTF8StringEncoding)
                                                                                                                                                              }
                                                                           documentAttributes:nil
                                                                                        error:nil];


 [attributedString beginEditing];

   //Hack for italic/skew effect to custom fonts
 [attributedString enumerateAttribute:NSParagraphStyleAttributeName inRange:NSMakeRange(0, attributedString.length) options:0 usingBlock:^(id value, NSRange range, BOOL *stop) {

    if (value) {

        NSMutableParagraphStyle *myStyle = (NSMutableParagraphStyle *)value;

        if (myStyle.minimumLineHeight == 99) {
            [myStyle setMinimumLineHeight:0];
            [attributedString addAttribute:NSObliquenessAttributeName
                                     value:[NSNumber numberWithFloat:0.30] range:range];
        }

    }
}];

     //Hack for bold effect.
 [attributedString enumerateAttribute:NSStrikethroughStyleAttributeName inRange:NSMakeRange(0, attributedString.length) options:0 usingBlock:^(id value, NSRange range, BOOL *stop) {

     if (value) {

        [attributedString addAttribute:NSStrokeWidthAttributeName
                                                 value:[NSNumber numberWithFloat:-3.0] range:range];

        [attributedString addAttribute:NSStrikethroughStyleAttributeName
                                 value:[NSNumber numberWithFloat:0.0] range:range];
      }

}];


[attributedString endEditing];

return attributedString;
}

Answer 2

, , .

, .

. , .

Edit:

, iOS