The name of a group of actions to display in the alert.
- iOS 8.0–10.0Deprecated
- watchOS 2.0–3.0Deprecated
The value of this property is the category name associated with a registered
UIUser object. When the alert for the local notification is displayed, the system uses the string you specify to look up the group and retrieve its actions. It then adds a button to the alert for each action defined by the group. When the user taps one of those buttons, the app is woken up (or launched) and given a chance to perform the designated action. If the specified category name does not belong to a registered group of actions, the alert does not display any additional action buttons.
Specifying custom actions is optional. The value of this property is
nil by default.