Join Friends Multiplayer Game

Bind the Event

To enable this functionality, all you need to do is to bind this delegate and join the session.

You can now join your friends from the Social Overlay!

Online Subsystem (C++)

If you use the Online Subsystem session interface instead, pressing Join in the overlay calls OnSessionUserInviteAccepted with the friend's session as the search result, the same delegate that accepted invites use. Join it with JoinSession:

SessionInterface->AddOnSessionUserInviteAcceptedDelegate_Handle(FOnSessionUserInviteAcceptedDelegate::CreateLambda(
	[SessionInterface](bool bWasSuccessful, int32 LocalUserNum, FUniqueNetIdPtr UserId, const FOnlineSessionSearchResult& SearchResult)
	{
		if (bWasSuccessful)
		{
			SessionInterface->JoinSession(LocalUserNum, NAME_GameSession, SearchResult);
		}
	}));

warning

Use either the Blueprint event above or the Online Subsystem delegate. If you bind both, both are called and the player joins twice.