MPCKit

A simple wrapper for the MultipeerConnectivity framework provided by Apple.

Set up:

Add NSLocalNetworkUsageDescription key to your Info.plist file (required on iOS 14+)
Add NSBonjourServices key to your Info.plist file. Add two items to the array: _your-service._tcp and _your-service._udp
Create a delegate conforming to MPCManagerDelegate protocol in order to receive updates from the MPCManager.
Create an instance of class MPCManager in your app. Only one instance should be made.

import MPCKit

// Create the manager
let myManager = MPCManager()
myManager.delegate = self

// To start and stop advertising...
myManager.start(.advertising)
myManager.stop(.advertising)

// To start and stop browsing...
myManager.start(.browsing)
myManager.stop(.browsing)

// To start and stop new connections...
myManager.start(.newConnections)
myManager.stop(.newConnections)

// To start and stop all connections (including existing)...
myManager.start(.allConnections)
myManager.stop(.allConnections)

The delegate:

All changes that occur in the MPCManager class are reported via the delegate.

There are six required methods:

func foundPeer(id: MCPeerID, discoveryInfo: [String : String]?)

Notifies the delegate that a peer has been found. If you wish to invite the peer, call func invite(peer: MCPeerID) on the manager object.

func lostPeer(id: MCPeerID)

Notifies the delegate that a peer is no longer available for connection.

func connectedToPeer(id: MCPeerID)

Notifies the delegate that a peer has been successfully connected to.

func disconnectedFromPeer(id: MCPeerID)

Notifies the delegate that a peer has disconnected from the session.

func receivedInvite(from peerID: MCPeerID, context: Data?, response: @escaping (Bool) -> Void)

Notifies the delegate that an invite has been received. Call response(true) to accept or response(false) to decline.

func encounteredError(error: Error)

Notifies the delegate that an error has been encountered, providing an opportunity to present an error message to the user.

There are four optional methods:

The following methods are optional because although every use case will require at least one of these, most only require one.

func didReceive(data: Data, fromPeer id: MCPeerID)

Notifies the delegate that data has been received.

func didReceive(stream: InputStream, withName name: String, fromPeer id: MCPeerID)

Notifies the delegate that a stream has been received.

func didStartReceivingResource(withName resourceName: String, fromPeer id: MCPeerID, progress: Progress)

Notifies the delegate that resources are starting to be received.

func didFinishReceivingResource(withName resourceName: String, fromPeer id: MCPeerID, at localURL: URL?, withError error: Error?)

Notifies the delegate that resources have been delivered to the specified local URL.

License