蓝牙实例

转载自：http://www.aisidachina.com

原创文章：http://www.aisidachina.com/forum/thread-134-1-1.html 转载请注明出处

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];
}