---
title: addressBook
framework: Address Book UI
role: symbol
role_heading: Instance Property
platforms: [iOS 2.0+, iPadOS 2.0+, Mac Catalyst 13.1+]
path: addressbookui/abpeoplepickernavigationcontroller/addressbook
---

# addressBook

Optional; the address book from which to obtain the list of contacts.

## Declaration

```swift
var addressBook: ABAddressBook? { get set }
```

## Discussion

Discussion When unset, an address book is created and assigned to this property when needed. This property is only used when the app has access to the user’s contacts—otherwise it remains NULL.