Swift 3.0将UILabel数字颜色设置为红色的方法

//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 =tryNSRegularExpression(pattern: regex, options: NSRegularExpression.Options())

  let  result = regexExpression.matches(in: text, options:  NSRegularExpression.MatchingOptions(), range: NSMakeRange(0,  text.characters.count))

  foritem in result {

   attributeString.addAttribute(NSForegroundColorAttributeName, value: color, range: item.range)

  }

 }catch{

  print("Failed with error: (error)")

 }

 returnattributeString

}

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)