---
title: ABUnknownPersonViewController
framework: addressbookui
role: symbol
role_heading: Class
path: addressbookui/abunknownpersonviewcontroller
---

# ABUnknownPersonViewController

The ABUnknownPersonViewController class (whose instances are known as unknown-person view controllers) implements a view controller used to create a person record from a set of person properties.

## Declaration

```swift
class ABUnknownPersonViewController
```

## Overview

Overview Unknown-person view controllers display contact information that can be saved to the Address Book database. From instances of this class, users may also initiate standard actions, such as: Phone call Text message Create contact Add to contact Performing any of the standard actions may result in your application being moved to the background. important: Unknown-person view controllers must be used with a navigation controller in order to function properly. Subclassing The ABUnknownPersonViewController class does not support subclassing.

## Topics

### Responding to View Controller Interactions

- [unknownPersonViewDelegate](addressbookui/abunknownpersonviewcontroller/unknownpersonviewdelegate.md)
- [ABUnknownPersonViewControllerDelegate](addressbookui/abunknownpersonviewcontrollerdelegate.md)

### Displaying Person Properties

- [alternateName](addressbookui/abunknownpersonviewcontroller/alternatename.md)
- [message](addressbookui/abunknownpersonviewcontroller/message.md)
- [displayedPerson](addressbookui/abunknownpersonviewcontroller/displayedperson.md)

### Configuring the Interface Details

- [addressBook](addressbookui/abunknownpersonviewcontroller/addressbook.md)
- [allowsActions](addressbookui/abunknownpersonviewcontroller/allowsactions.md)
- [allowsAddingToAddressBook](addressbookui/abunknownpersonviewcontroller/allowsaddingtoaddressbook.md)

## Relationships

### Inherits From

- [UIViewController](uikit/uiviewcontroller.md)

### Conforms To

- [CVarArg](swift/cvararg.md)
- [CustomDebugStringConvertible](swift/customdebugstringconvertible.md)
- [CustomStringConvertible](swift/customstringconvertible.md)
- [Equatable](swift/equatable.md)
- [Hashable](swift/hashable.md)
- [NSCoding](foundation/nscoding.md)
- [NSExtensionRequestHandling](foundation/nsextensionrequesthandling.md)
- [NSObjectProtocol](objectivec/nsobjectprotocol.md)
- [NSTouchBarProvider](appkit/nstouchbarprovider.md)
- [Sendable](swift/sendable.md)
- [SendableMetatype](swift/sendablemetatype.md)
- [UIActivityItemsConfigurationProviding](uikit/uiactivityitemsconfigurationproviding.md)
- [UIAppearanceContainer](uikit/uiappearancecontainer.md)
- [UIContentContainer](uikit/uicontentcontainer.md)
- [UIFocusEnvironment](uikit/uifocusenvironment.md)
- [UIPasteConfigurationSupporting](uikit/uipasteconfigurationsupporting.md)
- [UIResponderStandardEditActions](uikit/uiresponderstandardeditactions.md)
- [UIStateRestoring](uikit/uistaterestoring.md)
- [UITraitChangeObservable](uikit/uitraitchangeobservable-67e94.md)
- [UITraitEnvironment](uikit/uitraitenvironment.md)
- [UIUserActivityRestoring](uikit/uiuseractivityrestoring.md)

## See Also

### Detail Display

- [ABNewPersonViewController](addressbookui/abnewpersonviewcontroller.md)
- [ABPersonViewController](addressbookui/abpersonviewcontroller.md)
- [ABCreateStringWithAddressDictionary(_:_:)](addressbookui/abcreatestringwithaddressdictionary(_:_:).md)