change placeholder text color in swift code example

Example 1: set white place holder color in swift

placeholderLabel.textColor (Swift 4)

_placeholderLabel.textColor (Swift 3 or less)

Example 2: swift uitextfield placeholder color

myTextField.attributedPlaceholder = NSAttributedString(string: "placeholder text",
                             attributes: [NSAttributedString.Key.foregroundColor: UIColor.white])