UITextView linkTextAttributes font attribute not applied to NSAttributedString

Question

I have an NSAttributedString generated from HTML which includes some links. The attributed string is shown in a UITextView. I wish to apply a different font style f

Answer 1

Not sure why linkTextAttributes doesn't work for the font name. But we can achieve this by updating the link attributes of the NSAttributedString. Check the code below.

        do {
        let htmlStringCode = "For more info Click here"

        let string = try NSAttributedString(data: htmlStringCode.dataUsingEncoding(NSUTF8StringEncoding)!, options: [NSDocumentTypeDocumentAttribute:NSHTMLTextDocumentType, NSCharacterEncodingDocumentAttribute: NSUTF8StringEncoding], documentAttributes: nil)

        let newString = NSMutableAttributedString(attributedString: string)
        string.enumerateAttributesInRange(NSRange.init(location: 0, length: string.length), options: .Reverse) { (attributes : [String : AnyObject], range:NSRange, _) -> Void in
            if let _ = attributes[NSLinkAttributeName] {
                newString.removeAttribute(NSFontAttributeName, range: range)
                newString.addAttribute(NSFontAttributeName, value: UIFont.systemFontOfSize(30), range: range)
            }
        }
        textField.attributedText = newString
        textField.linkTextAttributes = [NSForegroundColorAttributeName : UIColor.redColor(), NSUnderlineStyleAttributeName : NSUnderlineStyle.StyleNone.rawValue]

    }catch {
    }

This is the objective-C code for this:

NSDictionary *options = @{NSDocumentTypeDocumentAttribute : NSHTMLTextDocumentType};
NSData *data = [html dataUsingEncoding:NSUnicodeStringEncoding allowLossyConversion:NO];

NSAttributedString *attributedString = [[NSAttributedString alloc] initWithData:data options:options documentAttributes:nil error:nil];
NSMutableAttributedString *attributedStringWithBoldLinks = [[NSMutableAttributedString alloc] initWithAttributedString:attributedString];

[attributedString enumerateAttributesInRange:NSMakeRange(0, attributedString.string.length) options:NSAttributedStringEnumerationReverse usingBlock:^(NSDictionary * _Nonnull attrs, NSRange range, BOOL * _Nonnull stop) {

    if ([attrs objectForKey:NSLinkAttributeName]) {
        [attributedStringWithBoldLinks removeAttribute:NSFontAttributeName range:range];
        [attributedStringWithBoldLinks addAttribute:NSFontAttributeName value:[UIFont fontWithName:@"YourFont-Bold" size:16.0] range:range];
    }
}];

self.linkTextAttributes = @{NSForegroundColorAttributeName : [UIColor redColor]};

self.attributedText = attributedStringWithBoldLinks;