The Mega Frog Race demo project builds and plays on iOS and Android with an IL2CPP build and unity 2018.4
With a unity 2019.4 IL2CPP build Android still works but iOS freezes at the moment it should connect.
Specifically the line that it breaks on is in RTSClient.cs
_client.Connect(string.IsNullOrEmpty(ipAddr) ? DEFAULT_ENDPOINT : ipAddr, port, UDPListenPort, token);
On this page https://aws.amazon.com/gamelift/getting-started/
It does say "can be used with Unity 2018". So I'm wondering if official support for 2019 is in works?
Also, we are currently trying to figure out what exactly caused this changed behaviour between the two versions.
An earlier line in RTSClient
ClientConfiguration clientConfiguration = ClientConfiguration.Default();
gives us a warning
CS0618: 'ClientConfiguration.Default()' is obsolete: 'This connection is unsecured! Prefer a secured ConnectionType instead! Note, secure connection establishment requires the Realtime server to contain generated certificates. Refer to AWS Gamelift documentations for creating a certificate-enabled Script fleet.'
So it could be that unsecured connections were allowed on iOS with 2018 builds but not with 2019?