UITextView设置富文本行间距

    //html是富文本内容
    NSMutableParagraphStyle *paragraphStyle = [NSMutableParagraphStyle new];
    paragraphStyle.lineSpacing = 7;// 设置富文本字体的行间距
    NSMutableAttributedString *attributeString = [[NSMutableAttributedString alloc] initWithData:[html dataUsingEncoding:NSUnicodeStringEncoding] options:@{NSDocumentTypeDocumentAttribute:NSHTMLTextDocumentType} documentAttributes:nil error:nil];
    [attributeString addAttribute:NSParagraphStyleAttributeName value:paragraphStyle range:NSMakeRange(0, [attributeString length])];
    textView.attributedText = attributeString;