//根据正则表达式改变文字颜色
func changeTextChange(regex: String, text: String, color: UIColor) -> NSMutableAttributedString
{
 let attributeString = NSMutableAttributedString(string: text)
 do {
  let regexExpression = try NSRegularExpression(pattern: regex, options: NSRegularExpression.Options())
  let result = regexExpression.matches(in: text, options: NSRegularExpression.MatchingOptions(), range: NSMakeRange(0, text.characters.count))
  for item in result {
   attributeString.addAttribute(NSForegroundColorAttributeName, value: color, range: item.range)
  }
 } catch {
  print("Failed with error: \(error)")
 }
 return attributeString
}
let text = "注：此商品只能整件(12的倍数发货),已选1袋,还差11袋"
let renderLabel = UILabel(frame: CGRect(x: 0, y: 0, width: 800, height: 30))
renderLabel.textAlignment = NSTextAlignment.center
renderLabel.backgroundColor = UIColor.lightGray
renderLabel.font = UIFont.boldSystemFont(ofSize: 20)
renderLabel.attributedText = changeTextChange(regex: "\\d+", text: text, color: UIColor.red)