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# GKGameSessionEventListener

An event listener that handles game session events.

```
protocol GKGameSessionEventListener : NSObjectProtocol
```

## Topics

### Changing Player Status

[`session(_:didAdd:)`](/documentation/GameKit/GKGameSessionEventListener/session(_:didAdd:))

Tells the listener a new player has been added to a game session.

[`session(_:didRemove:)`](/documentation/GameKit/GKGameSessionEventListener/session(_:didRemove:))

Tells the listener a player left a game session.

[`session(_:player:didChange:)`](/documentation/GameKit/GKGameSessionEventListener/session(_:player:didChange:))

Tells the listener a player’s connection state has changed.

[`GKConnectionState`](/documentation/GameKit/GKConnectionState)

Possible connection states for a player

### Transferring Data

[`session(_:didReceive:from:)`](/documentation/GameKit/GKGameSessionEventListener/session(_:didReceive:from:))

Tells the listener the player received data from another player.

[`session(_:didReceiveMessage:with:from:)`](/documentation/GameKit/GKGameSessionEventListener/session(_:didReceiveMessage:with:from:))

Tells the listener a player has received a message from another player.

[`session(_:player:didSave:)`](/documentation/GameKit/GKGameSessionEventListener/session(_:player:didSave:))

Tells the listener data was saved by a player.


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