Game Development Reference
In-Depth Information
How to do it...
Before starting with the multiplayer code we should make the game ready for it. First, go in
to the
GameScene
class and remove the sample
SKLabelNode
addition code in the
overridden method
didMoveToView
of
GameScene
where we usually set up the scene.
Secondly, remove the
for
loop of touches from the
touchesBegan:withEvent
method, which does the addition of
SKSpriteNode
and its action.
Our project is now ready to start with the multiplayer. Multiplayer games can be developed
in several ways. They can be either played using Bluetooth, Wifi, Internet, or GameCenter.
All these techniques allow us to interconnect devices and share data across devices. This
allows us to show the movement of players in real time. You might have seen the respons-
iveness in multiplayer games. They are really seamless. In this section we will explore
more about multiplayer games and their implementation in iOS. Here we will be instantiat-
ing a session (that is, MCSession) for the local player, which will further connect to another
player in this recipe. Also, to instruct the user to touch we will add an info label saying
Tap to connect
and further will implement the delegates of MCSession following
with the explanation of Multiplayer Game States. Stated below are the steps to accomplish
this task:
1. Open
GameScene.m
file, and create an interface with properties of
InfoLabel
and all related session stuff. Also make
GameScene
follow
MCSes-
sionDelegate
and the interface will look like this:
@interface GameScene() <MCSessionDelegate>
@property (nonatomic, strong) MCSession* gameSession;
@property (nonatomic, strong) MCPeerID* gamePeerID;
@property (nonatomic, strong) NSString* serviceType;
@property (nonatomic, strong) MCAdvertiserAssistant*
advertiser;
@property (nonatomic, strong) SKLabelNode*
gameInfoLabel;
@end
