GKMatchmaker class is used to present a standard user interface to the player. This interface allows them to invite friends to a match or to allow Game Center to fill the remaining players needed for a match.
- iOS 4.1+
- macOS 10.8+
- tvOS 9.0+
To show a matchmaking screen, initialize a new
GKMatchmaker object and set the delegate. Configure the view controller’s other properties to match your specific needs, then present the new view controller. and wait for the delegate to be called. The view controller’s delegate is notified when the matchmaking process is completed or canceled. In either situation, you dismiss the view controller. Listing 1 shows how to present the matchmaking user interface to the player.
If the user is creating the match, your game initializes the matchmaker view controller by creating a
GKMatch object that describes the desired match. This match request is passed to the
init(match method. When this view controller is displayed, the local player can invite other players into the match.
If your game receives an invitation from another player, it receives a
GKInvite object representing the match the player was invited to. You initialize the matchmaker view controller by passing the
GKInvite object received from Game Kit to the
init(invite:) method. When this view controller is presented to the player, the player joins the existing match, but is not allowed to invite others to the match.
On iOS, you present and dismiss the view controller from another view controller in your game, using the methods provided by the
UIView class. In macOS, you use the
GKDialog class to present and dismiss the view controller.