swift之设置 UITextField placeholder颜色

UITextField placeholder颜色设置

    @IBInspectable var placeHolderColor: UIColor? {
           get {
               return self.placeHolderColor
           }
           set {
               self.attributedPlaceholder = NSAttributedString(string:self.placeholder != nil ? self.placeholder! : "", attributes:[NSAttributedString.Key.foregroundColor: newValue!])
           }
       }