stateRestorationSystemVersionKey
The version of the system on which your app created the restoration archive.
Declaration
class let stateRestorationSystemVersionKey: StringDiscussion
The value of this key is an NSString object containing the iOS system version that was installed when the archive was saved. The format of this string matches the format of the value in the systemVersion property of the UIDevice class.
See Also
Managing app state restoration
application(_:shouldSaveSecureApplicationState:)application(_:shouldRestoreSecureApplicationState:)application(_:viewControllerWithRestorationIdentifierPath:coder:)application(_:willEncodeRestorableStateWith:)application(_:didDecodeRestorableStateWith:)stateRestorationBundleVersionKeystateRestorationTimestampKeystateRestorationUserInterfaceIdiomKeystateRestorationViewControllerStoryboardKey