A Boolean value that states whether the player has completed the achievement.
- iOS 4.0+
- macOS 10.8+
- Mac Catalyst 13.0+
- tvOS 9.0+
- watchOS 3.0+
The value of this property is
YES if the
percentComplete property is equal to
100.0; otherwise, it is
Reading the State of an Achievement
The last time that progress on the achievement was successfully reported to Game Center.