MultipeerConnectivity does not work as expected on iOS 14

Question

When the MCBrowserViewController is invoked

-[MCBrowserViewController advertiser:didNotStartAdvertisingPeer:]: unrecognized selector sent to instance

error message is thrown.

when MCAdvertiserAssistant tries starts advertising

-[MCAdvertiserAssistant advertiser:didNotStartAdvertisingPeer:]: unrecognized selector sent to instance

error message is thrown.

Struck and unable to proceed. My business depends on MultipeerConnectivity framework.

Any help will be greatly appreciated.

score 8 · Answer 1 · answered Sep 26 '20 at 09:46

8

let assistant = MCAdvertiserAssistant(serviceType: "tictactoe", discoveryInfo: nil, session: session)
let browser = MCBrowserViewController(serviceType: "tictactoe", session: session)

Insert in the info.plist the following fields:

Privacy - Local Network Usage Description
Bonjour services with the following initialisation: _tictactoe._tcp and _tictactoe._udp

answered Sep 26 '20 at 09:46

hamzaozturk

453
1
5
12

What are these value actually?_tictactoe._tcp and _tictactoe._udp – Rajesh Sep 26 '20 at 14:25
Thanks for your answer actually this solution does not solve the issue. Btw the issue is not happening in Simulator. – Rajesh Sep 26 '20 at 15:56
Those are the identifiers you are using while creating the advertiser and browser. – hamzaozturk Sep 26 '20 at 16:13
What value should i use ? – Rajesh Sep 27 '20 at 01:18
How do you create your MCBrowserViewController and MCAdvertiserAssistant? Can you show your code? – hamzaozturk Sep 27 '20 at 13:58
advertiser = MCAdvertiserAssistant(serviceType: identifier, discoveryInfo: nil, session: session) browserController = MCBrowserViewController(serviceType: identifier, session: session) – Rajesh Sep 28 '20 at 08:37
What is the value of the identifier variable? – hamzaozturk Sep 28 '20 at 10:29
both are same "PARTY_ID" – Rajesh Sep 28 '20 at 13:13
so you should add as _PARTY_ID._tcp and _PARTY_ID._udp – hamzaozturk Sep 28 '20 at 14:48
Crash got fixed but the connection gets declined now. you got any idea? – Rajesh Sep 29 '20 at 08:37
I am unable to see Hosted Device while Joining session. Please help guys – Kudos Apr 21 '21 at 15:37

ghostK9 · Answer 2 · 2020-10-01T11:14:41.480

2

i did face some issues implementing MultipeerConnectivity too. After some research found a fix.. what i did was

i followed https://www.hackingwithswift.com/example-code/networking/how-to-create-a-peer-to-peer-network-using-the-multipeer-connectivity-framework this.
added Bonjour services (value- _*serviceType*._tcp) and Privacy - Local Network Usage Description in Info.plist.
removed SceneDelegate related stuff as in Opt out of UISceneDelegate/SwiftUI on iOS

clean and build.

Note:i am working with Xcode12 and iOS14.

edited Oct 01 '20 at 11:14

answered Oct 01 '20 at 11:08

ghostK9

51
3

Crash got fixed but the connection gets declined now. you got any idea? – Rajesh Oct 01 '20 at 17:02

MultipeerConnectivity does not work as expected on iOS 14

2 Answers2