I placed a GKMessageImage.png image file into the Assets.xcassets folder in my Xcode project and then reloaded each iPhone, which I use for testing, with my new application via XCode. When one iPhone sends an Invite text message to the other iPhone, I do not see my GKMessageImage.png being presented. The Game Center default colored bubbles are still being presented.
What am I doing wrong?
Does the GKMessageImage.png have to be a specific size ?