The set of app presentation options that are currently in effect for the system.
- macOS 10.6+
The presentation options. The constants are listed in
NSApplication and can combined using a C bitwise OR operator.
This property contains the presentation options that have been put into effect by the currently active app. You can use key-value observing on this property to receive notifications when:
The client is the active app and makes a change itself using either the
presentationproperty or the SetSystemUIMode function.
Another app is active and makes presentation changes of its own.
Another app becomes active and causes the active set of presentation options to change.
Key-value observing notifications aren’t sent when one of the above conditions occur, but has the same set of presentation options as the previously active app.