CODEWITHSUNDEEP
multipeer-connectivitymcsession
phbardon
phbardon

Reputation: 157

MCNearbyServiceAdvertiser delegate methods never called

Implementing an app with automatic connection between devices to exchange small bunch of data, using Multi-peer Connectivity framework and Nearby Services (both browser and advertiser).

I built a Session Manager handling all connections details. Its delegate is a View Controller in order to handle updates of UI when data are received.

The Session Manager builds:

Launching the app on two devices (one under Xcode to get the logs, the other one stand alone), I receive a Found Peer message through Service Browser delegate corresponding method.

As stated in another message, I compare the displayName property of MCPeerID (both local and from received Peer) to decide whichever of both will send invitation, thus avoiding cross-invitations.

As stated on another message here, I have also added the "optional" MCSession delegate method - (void)session:didReceiveCertificate:fromPeer:certificateHandler:

However, delegate method (void)advertiser:didReceiveInvitationFromPeer:withContext:invitationHandler: of MCNearbyServiceAdvertiser is never called. There is only a NotConnected message received by the MCSession delegate method (void)session:peer:didChangeState:after the timeout setup in the invitePeer:toSession:withContext:timeout:method.

In the various options proposed:

To troubleshoot:

I don't know where to look over now!

Upvotes: 1

Views: 1141

Answers (1)

Rick
Rick

Reputation: 1828

Make sure that the MCpeerID you use for your local peer is the same for both the discovery and invitation phases.

I had a structure with a separate session manager to the connect/transfer worker. I made the mistake of initialising a new MCpeerID in the worker to create a session prior to the invitation, resulting in the same behaviour.

Passing the MCpeerID and MCNearbyServiceBrowser to the worker to create the session and invite fixed the issue.

Upvotes: 0

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