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介绍一下这个实例实现的是两个带有蓝牙设备的touch之间的一个小游戏，在界面上有个可以响应事件的UIView（之前说过）可以点击，然后看谁新达到WINNING_TAP_COUNT （游戏中一常量可以自己设置）谁先达到谁就赢了，然后通知对方。还要引入GameKit.framework框架
头文件BlueToothViewController.h：
//
//
// BlueToothViewController.h
// BlueTooth
//
// Created by mingchun liu on 09-11-24.
// Copyright sdie 2009. All rights reserved.
//
#import <UIKit/UIKit.h>
#import <GameKit/GameKit.h>
#define START_GAME_KEY @"startgame"
#define END_GAME_KEY @"endgame"
#define TAP_COUNT_KEY @"taps"
#define WINNING_TAP_COUNT 50
#define AMIPHD_P2P_SESSION_ID @"amiphdp2p2"//这个是蓝牙协议
@interface BlueToothViewController : UIViewController<GKPeerPickerControllerDelegate,GKSessionDelegate>{
BOOL actingAsHost;//是否提供服务,客户端还是服务器端
int playerTapCount;//记录玩家点击次数
int opponentTapCount;//对方点击次数
IBOutlet UILabel *playerTapCountLabel;//显示玩家点击次数
IBOutlet UILabel *opponentTapCountLabel;//显示对手点击次数
NSString *opponentID;//对方标识符
GKSession *gkSession;
IBOutlet UILabel *startQuitButton;//开始退出按钮
}
@property BOOL actingAsHost;
@property int playerTapCount;
@property int opponentTapCount;
@property (nonatomic,retain) GKSession *gkSession;
@property (nonatomic,retain) NSString *opponentID;
@property (nonatomic,retain)UILabel *playerTapCountLabel;
@property (nonatomic,retain)UILabel *opponentTapCountLabel;
@property (nonatomic,retain)UILabel *startQuitButton;
-(IBAction) handleStartQuitTapped;//处理开始退出操作
-(IBAction) handleTapViewTapped;//处理点击UIView的操作
-(void) updateTapCountLabels;//更新显示
-(void) initGame;//初始化游戏
-(void) hostGame;
-(void) joinGame;//加入游戏
-(void) endGame;//结束游戏
-(void) showEndGameAlert;//弹出结束游戏对话框
@end
下面是BlueToothViewController.m：
//
// BlueToothViewController.m
// BlueTooth
//
// Created by mingchun liu on 09-11-24.
// Copyright sdie 2009. All rights reserved.
//
#import "BlueToothViewController.h"
@implementation BlueToothViewController
@synthesize actingAsHost;
@synthesize playerTapCount;
@synthesize opponentID;
@synthesize playerTapCountLabel;
@synthesize opponentTapCountLabel;
@synthesize startQuitButton;
@synthesize gkSession;
@synthesize opponentTapCount;
-(IBAction) handleStartQuitTapped {//建立链接操作,弹出链接窗口显示在线
if (! opponentID) {//如果对手ID为空就建立服务端提供服务
actingAsHost = YES;
GKPeerPickerController *peerPickerController =[[GKPeerPickerController alloc] init];
peerPickerController.delegate = self;
peerPickerController.connectionTypesMask =
GKPeerPickerConnectionTypeNearby;
[peerPickerController show];
}
}
-(IBAction) handleTapViewTapped {//点击操作
playerTapCount++;
[self updateTapCountLabels];
// did we just win?
BOOL playerWins = playerTapCount >= WINNING_TAP_COUNT;//当点击达到一定次数时
// send tap count to peer
NSMutableData *message = [[NSMutableData alloc] init];//传的数据类型为nsdata类型的
NSKeyedArchiver *archiver =
[[NSKeyedArchiver alloc] initForWritingWithMutableData:message];
[archiver encodeInt:playerTapCount forKey: TAP_COUNT_KEY];
if (playerWins)
[archiver encodeBool:YES forKey:END_GAME_KEY];
[archiver finishEncoding];//打包传数据
GKSendDataMode sendMode =
playerWins ? GKSendDataReliable : GKSendDataUnreliable;//判断用可靠的链接还是不可靠的链接
[gkSession sendDataToAllPeers: message withDataMode:sendMode error:NULL];//发送数据
[archiver release];
[message release];
// also end game locally
if (playerWins)
[self endGame];
}
-(void) updateTapCountLabels {
playerTapCountLabel.text =
[NSString stringWithFormat:@"%d", playerTapCount];
opponentTapCountLabel.text =
[NSString stringWithFormat:@"%d", opponentTapCount];
}
-(void) initGame {
playerTapCount = 0;
opponentTapCount = 0;
}
-(void) hostGame {
[self initGame];
NSMutableData *message = [[NSMutableData alloc] init];
NSKeyedArchiver *archiver = [[NSKeyedArchiver alloc]
initForWritingWithMutableData:message];
[archiver encodeBool:YES forKey:START_GAME_KEY];
[archiver finishEncoding];
NSError *sendErr = nil;
[gkSession sendDataToAllPeers: message
withDataMode:GKSendDataReliable error:&sendErr];
if (sendErr)
NSLog (@"send greeting failed: %@", sendErr);
// change state of startQuitButton
startQuitButton.text = @"Quit";
[message release];
[archiver release];
[self updateTapCountLabels];
}
-(void) joinGame {
[self initGame];
startQuitButton.text = @"Quit";
[self updateTapCountLabels];
}
//一下是代理方法
-(GKSession *) peerPickerController: (GKPeerPickerController*) controller
sessionForConnectionType: (GKPeerPickerConnectionType) type {
if (!gkSession) {//如果没有链接时建立连接
gkSession = [[GKSession alloc]
initWithSessionID:AMIPHD_P2P_SESSION_ID//根据此值判断用的是什么链接
displayName:nil//在线用户名
sessionMode:GKSessionModePeer];
gkSession.delegate = self;
}
return gkSession;
}
- (void)peerPickerController:(GKPeerPickerController *)picker didConnectPeer:(NSString *)peerID toSession:(GKSession *)session
{//当picker接收到数据后将其释放掉，否则进入不了界面
[picker dismiss];
picker.delegate = nil;
[picker autorelease];
}
- (void)session:(GKSession *)session
didReceiveConnectionRequestFromPeer:(NSString *)peerID {//已接受连接请求的代理方法
actingAsHost = NO;//设为客户端
}
- (void)session:(GKSession *)session peer:(NSString *)peerID
didChangeState:(GKPeerConnectionState)state {//状态改变时触发的代理方法
switch (state)
{
case GKPeerStateConnected:
[session setDataReceiveHandler: self withContext: nil];
opponentID = peerID;//改变opponentID的值
actingAsHost ? [self hostGame] : [self joinGame];//
break;
}
}
- (void) receiveData: (NSData*) data fromPeer: (NSString*) peerID
inSession: (GKSession*) session context: (void*) context {//接受数据时的代理操作
NSKeyedUnarchiver *unarchiver =
[[NSKeyedUnarchiver alloc] initForReadingWithData:data];
if ([unarchiver containsValueForKey:TAP_COUNT_KEY]) {
opponentTapCount = [unarchiver decodeIntForKey:TAP_COUNT_KEY];
[self updateTapCountLabels];
}
if ([unarchiver containsValueForKey:END_GAME_KEY]) {
[self endGame];
}
if ([unarchiver containsValueForKey:START_GAME_KEY]) {
[self joinGame];
}
[unarchiver release];
}
//以上是代理方法
-(void) showEndGameAlert {
BOOL playerWins = playerTapCount > opponentTapCount;
UIAlertView *endGameAlert = [[UIAlertView alloc]
initWithTitle: playerWins ? @"Victory!" : @"Defeat!"
message: playerWins ? @"Your thumbs have emerged supreme!":
@"Your thumbs have been laid low"
delegate:nil
cancelButtonTitle:@"OK"
otherButtonTitles:nil];
[endGameAlert show];
[endGameAlert release];
}
-(void) endGame {
opponentID = nil;
startQuitButton.text = @"Find";
[gkSession disconnectFromAllPeers];
[self showEndGameAlert];
}
/*
// The designated initializer. Override to perform setup that is required before the view is loaded.
- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil {
if (self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil]) {
// Custom initialization
}
return self;
}
*/
/*
// Implement loadView to create a view hierarchy programmatically, without using a nib.
- (void)loadView {
}
*/
/*
// Implement viewDidLoad to do additional setup after loading the view, typically from a nib.
- (void)viewDidLoad {
[super viewDidLoad];
}
*/
/*
// Override to allow orientations other than the default portrait orientation.
- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation {
// Return YES for supported orientations
return (interfaceOrientation == UIInterfaceOrientationPortrait);
}
*/
- (void)didReceiveMemoryWarning {
// Releases the view if it doesn't have a superview.
[super didReceiveMemoryWarning];
// Release any cached data, images, etc that aren't in use.
}
- (void)viewDidUnload {
// Release any retained subviews of the main view.
// e.g. self.myOutlet = nil;
}
- (void)dealloc {
[opponentID release];
[playerTapCountLabel release];
[opponentTapCountLabel release];
[startQuitButton release];
[gkSession release];
[super dealloc];
}