---
title: stateRestorationTimestampKey
framework: uikit
role: symbol
role_heading: Type Property
path: uikit/uiapplication/staterestorationtimestampkey
---

# stateRestorationTimestampKey

The time your app created the restoration archive.

## Declaration

```swift
class let stateRestorationTimestampKey: String
```

## Discussion

Discussion The value of this key is an NSDate object containing the date when the restoration archive was saved. The date is specified using coordinated universal time (UTC).

## See Also

### Managing app state restoration

- [application(_:shouldSaveSecureApplicationState:)](uikit/uiapplicationdelegate/application(_:shouldsavesecureapplicationstate:).md)
- [application(_:shouldRestoreSecureApplicationState:)](uikit/uiapplicationdelegate/application(_:shouldrestoresecureapplicationstate:).md)
- [application(_:viewControllerWithRestorationIdentifierPath:coder:)](uikit/uiapplicationdelegate/application(_:viewcontrollerwithrestorationidentifierpath:coder:).md)
- [application(_:willEncodeRestorableStateWith:)](uikit/uiapplicationdelegate/application(_:willencoderestorablestatewith:).md)
- [application(_:didDecodeRestorableStateWith:)](uikit/uiapplicationdelegate/application(_:diddecoderestorablestatewith:).md)
- [stateRestorationBundleVersionKey](uikit/uiapplication/staterestorationbundleversionkey.md)
- [stateRestorationSystemVersionKey](uikit/uiapplication/staterestorationsystemversionkey.md)
- [stateRestorationUserInterfaceIdiomKey](uikit/uiapplication/staterestorationuserinterfaceidiomkey.md)
- [stateRestorationViewControllerStoryboardKey](uikit/uiapplication/staterestorationviewcontrollerstoryboardkey.md)