A key whose value indicates when a keychain item is accessible.
- iOS 4.0+
- macOS 10.9+
- tvOS 9.0+
- watchOS 2.0+
The corresponding value, one of those found in Accessibility Values, indicates when your app needs access to the data in a keychain item. Choose the most restrictive option that meets your app’s needs so that the system can protect that item to the greatest extent possible. For more information, see Restricting Keychain Item Accessibility.