The message displayed in the notification alert.
- iOS 4.0–10.0Deprecated
- Mac Catalyst 13.0–13.0Deprecated
- watchOS 2.0–3.0Deprecated
Assign a string or, preferably, a localized-string key (using
NSLocalized) as the value of the message. If the value of this property is non-
nil, an alert is displayed. The default value is
nil (no alert). Printf style escape characters are stripped from the string prior to display; to include a percent symbol (%) in the message, use two percent symbols (%%).