StackOverflow2013

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2013-09-21T03:34:56.807
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2013-09-21T03:34:56.807
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<p>I found a solution. When handling the notification you need to walk the attributes and look for the text styles and update the font:</p> <pre><code>- (void)preferredContentSizeChanged:(NSNotification *)aNotification { UITextView *textView = <the text view holding your attributed text> NSMutableAttributedString *attributedString = [[NSMutableAttributedString alloc] initWithAttributedString:textView.attributedText]; NSRange range = NSMakeRange(0, attributedString.length - 1); // Walk the string's attributes [attributedString enumerateAttributesInRange:range options:NSAttributedStringEnumerationReverse usingBlock: ^(NSDictionary *attributes, NSRange range, BOOL *stop) { // Find the font descriptor which is based on the old font size change NSMutableDictionary *mutableAttributes = [NSMutableDictionary dictionaryWithDictionary:attributes]; UIFont *font = mutableAttributes[@"NSFont"]; UIFontDescriptor *fontDescriptor = font.fontDescriptor; // Get the text style and get a new font descriptor based on the style and update font size id styleAttribute = [fontDescriptor objectForKey:UIFontDescriptorTextStyleAttribute]; UIFontDescriptor *newFontDescriptor = [UIFontDescriptor preferredFontDescriptorWithTextStyle:styleAttribute]; // Get the new font from the new font descriptor and update the font attribute over the range UIFont *newFont = [UIFont fontWithDescriptor:newFontDescriptor size:0.0]; [attributedString addAttribute:NSFontAttributeName value:newFont range:range]; }]; textView.attributedText = attributedString; } </code></pre>
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1. POHandling UIContentSizeCategoryDidChangeNotification for NSAttributedString in UITextView
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