UIFontDescriptor *bodyFontDescriptor = [UIFontDescriptor preferredFontDescriptorWithTextStyle:UIFontTextStyleBody];

self.textView.font = [UIFont fontWithDescriptor:bodyFontDescriptor size:0];

self.textView.textColor = [UIColor blackColor];

self.textView.backgroundColor = [UIColor whiteColor];

self.textView.scrollEnabled = YES;

// Let's modify some of the attributes of the attributed string.

// You can modify these attributes yourself to get a better feel for what they do.

// Note that the initial text is visible in the storyboard.

NSMutableAttributedString *attributedText = [[NSMutableAttributedString alloc] initWithAttributedString:self.textView.attributedText];

NSString *text = self.textView.text;

// Find the range of each element to modify.

NSRange boldRange = [text rangeOfString:NSLocalizedString(@"bold", nil)];

NSRange highlightedRange = [text rangeOfString:NSLocalizedString(@"highlighted", nil)];

NSRange underlinedRange = [text rangeOfString:NSLocalizedString(@"underlined", nil)];

NSRange tintedRange = [text rangeOfString:NSLocalizedString(@"tinted", nil)];

// Add bold.

UIFontDescriptor *boldFontDescriptor = [self.textView.font.fontDescriptor fontDescriptorWithSymbolicTraits:UIFontDescriptorTraitBold];

UIFont *boldFont = [UIFont fontWithDescriptor:boldFontDescriptor size:0];

[attributedText addAttribute:NSFontAttributeName value:boldFont range:boldRange];

// Add highlight.

[attributedText addAttribute:NSBackgroundColorAttributeName value:[UIColor aapl_applicationGreenColor] range:highlightedRange];

// Add underline.

[attributedText addAttribute:NSUnderlineStyleAttributeName value:@(NSUnderlineStyleSingle) range:underlinedRange];

// Add tint.

[attributedText addAttribute:NSForegroundColorAttributeName value:[UIColor aapl_applicationBlueColor] range:tintedRange];

// Add an image attachment.

NSTextAttachment *textAttachment = [[NSTextAttachment alloc] init];

UIImage *image = [UIImage imageNamed:@"text_view_attachment"];

textAttachment.image = image;

textAttachment.bounds = CGRectMake(0, 0, image.size.width, image.size.height);

NSAttributedString *textAttachmentString = [NSAttributedString attributedStringWithAttachment:textAttachment];

[attributedText appendAttributedString:textAttachmentString];

self.textView.attributedText = attributedText;