IOS之TextView属性设置

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;