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# MultipeerConnectivityService

A service that provides scene synchronization among all peers in a multipeer
connectivity session.

```
class MultipeerConnectivityService
```

## Overview

RealityKit uses this class to automatically sync scenes with other connected
devices running the same app. It leverages the
<doc://com.apple.documentation/documentation/MultipeerConnectivity>
framework to automatically keep the scenes of all connected devices
synchronized. To sync a RealityKit scene, create a
[`MultipeerConnectivityService`](/documentation/RealityKit/MultipeerConnectivityService) object initialized with an
<doc://com.apple.documentation/documentation/MultipeerConnectivity/MCSession>
and assign it to your scene’s [`synchronizationService`](/documentation/RealityKit/Scene/synchronizationService) property.

```swift
let peerID = MCPeerID(displayName: UIDevice.current.name)
let session = MCSession(peer: peerID, securityIdentity: nil, encryptionPreference: .required)
arView.scene.synchronizationService = try?
MultipeerConnectivityService(session: self.session)
```

For more information on browsing for, and connecting to, other devices, see
<doc://com.apple.documentation/documentation/MultipeerConnectivity>.

## Topics

### Creating a connectivity service

[`init(session:)`](/documentation/RealityKit/MultipeerConnectivityService/init(session:))

Creates a new connectivity service.

### Getting the session

[`session`](/documentation/RealityKit/MultipeerConnectivityService/session)

The multipeer connectivity session used by the service.

### Managing ownership

[`owner(of:)`](/documentation/RealityKit/MultipeerConnectivityService/owner(of:))

Gets the device that owns a given entity.

[`giveOwnership(of:toPeer:)`](/documentation/RealityKit/MultipeerConnectivityService/giveOwnership(of:toPeer:))

Transfers ownership of the given entity to the named network device.

### Finding an entity

[`entity(for:)`](/documentation/RealityKit/MultipeerConnectivityService/entity(for:))

Gets the entity with the given identifier.

### Pausing and resuming

[`stopSync()`](/documentation/RealityKit/MultipeerConnectivityService/stopSync())

Stops multipeer synchronization.

[`startSync()`](/documentation/RealityKit/MultipeerConnectivityService/startSync())

Begins multipeer synchronization.

### Configuring the session

[`setHandshake(count:timeoutMs:)`](/documentation/RealityKit/MultipeerConnectivityService/setHandshake(count:timeoutMs:))

Configures handshake and timeout settings.


---

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