helpAnchor
A string to display in response to an alert panel help anchor button being pressed.
Declaration
var helpAnchor: String? { get }Discussion
The object in the user info dictionary for the key NSHelpAnchorErrorKey. If the user info dictionary doesn’t contain a value for NSHelpAnchorErrorKey, this property is nil.
If this property is non-nil for an error being presented by init(error:), the alert panel will include a help anchor button that can display this string.