Global Variable

UIApplicationStateRestorationSystemVersionKey

The version of the system on which your app created the restoration archive.

Declaration

NSString *const UIApplicationStateRestorationSystemVersionKey;

Discussion

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:shouldSaveApplicationState:

Asks the delegate whether the app’s state should be preserved.

- application:shouldRestoreApplicationState:

Asks the delegate whether the app’s saved state information should be restored.

- application:viewControllerWithRestorationIdentifierPath:coder:

Asks the delegate to provide the specified view controller.

- application:willEncodeRestorableStateWithCoder:

Tells your delegate to save any high-level state information at the beginning of the state preservation process.

- application:didDecodeRestorableStateWithCoder:

Tells your delegate to restore any high-level state information as part of the state restoration process.

UIApplicationStateRestorationBundleVersionKey

The version of your app responsible for creating the restoration archive.

UIApplicationStateRestorationTimestampKey

The time at which your app created the restoration archive.

UIApplicationStateRestorationUserInterfaceIdiomKey

The user interface idiom that was in effect when your app created the restoration archive.

UIStateRestorationViewControllerStoryboardKey

A reference to the storyboard that contains the view controller.