---
title: NSKeyedArchiveRootObjectKey
framework: foundation
role: symbol
role_heading: Global Variable
path: foundation/nskeyedarchiverootobjectkey
---

# NSKeyedArchiveRootObjectKey

Archives created using the class method archivedData(withRootObject:) use this key for the root object in the hierarchy of encoded objects. The NSKeyedUnarchiver class method unarchiveObject(with:) looks for this root key as well.

## Declaration

```swift
let NSKeyedArchiveRootObjectKey: String
```