1.普通富文本：
（1）富文本创建 & 赋值：
let content = "1、免费解锁所选任教学段内的全部绘本。\n2、可申请加入分级阅读教师交流圈"
let attributedString = NSMutableAttributedString(string: content)
self.contentTextView.attributedText=attributedString
（2）获取range：
let range0 = NSMakeRange(0, attributedString.length)
let range1 = attributedString.mutableString.range(of: "免费解锁")
let range2 = attributedString.mutableString.range(of: "全部绘本")
let range3 = NSMakeRange(28, attributedString.length - 28)
（3）常用样式：
attributedString.addAttribute(NSFontAttributeName, value: UIFont.systemFont(ofSize: 14), range: range0)//字体大小
attributedString.addAttribute(NSForegroundColorAttributeName, value: UIColor.hexColor(0xfd7d08), range: range2)//设置文字颜色
attributedString.addAttribute(NSKernAttributeName, value: 10, range: range1)//字间距
（4）设置段落样式（行间距、段间距、首行缩进...等）：
let paraph = NSMutableParagraphStyle()
paraph.lineSpacing = 10//行间距
paraph.paragraphSpacing = 20//段间距
paraph.firstLineHeadIndent = 40//首行缩进
attributedString.addAttribute(NSParagraphStyleAttributeName, value: paraph, range: range0)
（5）文字中添加图片：
let attachment = NSTextAttachment(data: nil, ofType: nil)
attachment.image = UIImage.init(named: "TSafe_3")
attachment.bounds = CGRect.init(x: 0, y: 0, width: 20, height: 20)
attributedString.addAttribute(NSAttachmentAttributeName, value: attachment, range: range0)//文字中添加图片（自测没有效果）
（6）其他：
attributedString.addAttribute(NSUnderlineStyleAttributeName, value: 1, range: range1)//下划线
attributedString.addAttribute(NSUnderlineColorAttributeName, value: UIColor.blue, range: range1)//下划线颜色
attributedString.addAttribute(NSStrikethroughStyleAttributeName, value: 1, range: range2)//删除线
attributedString.addAttribute(NSStrikethroughColorAttributeName, value: UIColor.red, range: range2)//删除线颜色
attributedString.addAttribute(NSLigatureAttributeName, value: 1, range: range3)//连体字（自测没有效果）
attributedString.addAttribute(NSBaselineOffsetAttributeName, value: 10, range: range2)//基准线偏移
attributedString.addAttribute(NSLinkAttributeName, value: "www.baidu.com", range: range1)//链接（自测没有效果）
//遵守UITextViewDelegate代理之后，实现此方法
func textView(_ textView: UITextView, shouldInteractWith URL: URL, in characterRange: NSRange) -> Bool {
if URL.scheme == "www.baidu.com" {
let viewController = AJGetTopViewControllerTool.topViewController()
viewController?.navigationController?.pushViewController(TValidateController(), animated: true)
return false
}
return true
}
2.带有html标签的富文本：
let contenString = "恭喜您已成功注册!可免费试用<font size=\"20\" color=\"red\"> 10 </font>天,体验全套绘本哦!"
do {
let attributedString = try NSAttributedString.init(data: (contenString?.data(using: String.Encoding.unicode))!, options: [NSDocumentTypeDocumentAttribute: NSHTMLTextDocumentType], documentAttributes: nil)
self.contentTextView.attributedText = attributedString
} catch { }
- 注：
当 self.contentTextView.attributedText=attributedString 之后（在设置attributedText之后），会覆盖掉对contentTextView之前相关属性（比如 font、textColor等属性）的设置！这也就是为什么有时候单独设置了属性，不生效的原因，需要在赋 attributedText 值之后，重新设置一下！
self.contentTextView.attributedText=attributedString
self.contentTextView.font = UIFont.systemFont(ofSize: 13)
