Beginning iOS Game Center and Game Kit: For iPhone, iPad, and iPod touch

A New Sample Project

Unfortunately, our existing UFOs sample game is not a suitable experience for testing turned-based gaming. It wouldn't make much sense to have each player make a move and then wait for the other player to catch up. Luckily, there is another very simple type of game that we can build a project around: tic-tac-toe. This classic children's game is something almost all of us have played, and we have experience with the rules and strategy.

We begin by creating a new navigation controller–based project. There are three views that we will be working with throughout the project.

• Main View: This view simply contains a button that launches the GKTurnedBasedMatchmakerViewController.
• GKTurnedBasedMatchmakerViewController: This is the ...