[ios2]蓝牙通信【转】

iPhone开发应用中关于GameKit蓝牙实例讲解是本文要介绍的内容，主要是来了解并学习GameKit蓝牙实例。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：
[pre]

//  
1. //  // BlueToothViewController.h  
2. // BlueTooth  //  
3. // Created by mingchun liu on 09-11-24.  // Copyright sdie 2009. All rights reserved.  
4. //  
5. #import <UIKit/UIKit.h> #import <GameKit/GameKit.h>
6. 
   #define START_GAME_KEY @"startgame"  
7. #define END_GAME_KEY @"endgame"  #define TAP_COUNT_KEY @"taps"  
8. #define WINNING_TAP_COUNT 50  
9. #define AMIPHD_P2P_SESSION_ID @"amiphdp2p2"//这个是蓝牙协议  
10. @interface BlueToothViewController : UIViewController<GKPeerPickerControllerDelegate,GKSessionDelegate>{          BOOL actingAsHost;//是否提供服务,客户端还是服务器端  
11.         int playerTapCount;//记录玩家点击次数          int opponentTapCount;//对方点击次数  
12.         IBOutlet UILabel *playerTapCountLabel;//显示玩家点击次数          IBOutlet UILabel *opponentTapCountLabel;//显示对手点击次数  
13.         NSString *opponentID;//对方标识符          GKSession *gkSession;  
14. 
            IBOutlet UILabel *startQuitButton;//开始退出按钮  
15. }  
16. @property BOOL actingAsHost;  @property int playerTapCount;  
17. @property int opponentTapCount;  @property (nonatomic,retain) GKSession *gkSession;  
18. 
    @property (nonatomic,retain) NSString *opponentID;  
19. 
    @property (nonatomic,retain)UILabel *playerTapCountLabel;  
20. @property (nonatomic,retain)UILabel *opponentTapCountLabel;  
21. @property (nonatomic,retain)UILabel *startQuitButton;  
22. -(IBAction) handleStartQuitTapped;//处理开始退出操作  -(IBAction) handleTapViewTapped;//处理点击UIView的操作  
23. -(void) updateTapCountLabels;//更新显示  -(void) initGame;//初始化游戏  
24. -(void) hostGame;  -(void) joinGame;//加入游戏  
25. -(void) endGame;//结束游戏  -(void) showEndGameAlert;//弹出结束游戏对话框  
26. @end  
27. #import "BlueToothViewController.h"  
28. @implementation BlueToothViewController  
29. @synthesize actingAsHost;  @synthesize playerTapCount;  
30. @synthesize opponentID;  @synthesize playerTapCountLabel;  
31. @synthesize opponentTapCountLabel;  
32. @synthesize startQuitButton;  @synthesize gkSession;  
33. @synthesize opponentTapCount;  
34. -(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  
35. actingAsHost = YES;                  GKPeerPickerController *peerPickerController =[[GKPeerPickerController alloc] init];  
36. peerPickerController.delegate = self;  peerPickerController.connectionTypesMask =  
37. GKPeerPickerConnectionTypeNearby;                  [peerPickerController show];  
38.         }  }  
39. -(IBAction) handleTapViewTapped {//点击操作          playerTapCount++;  
40.         [self updateTapCountLabels];          // did we just win?  
41.         BOOL playerWins = playerTapCount >= WINNING_TAP_COUNT;//当点击达到一定次数时          // send tap count to peer  
42.         NSMutableData *message = [[NSMutableData alloc] init];//传的数据类型为nsdata类型的          NSKeyedArchiver *archiver =  
43.         [[NSKeyedArchiver alloc] initForWritingWithMutableData:message];          [archiver encodeInt:playerTapCount forKey: TAP_COUNT_KEY];  
44.         if (playerWins)                  [archiver encodeBool:YES forKey:END_GAME_KEY];  
45.         [archiver finishEncoding];//打包传数据          GKSendDataMode sendMode =  
46. 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  
47.         [archiver release];          [message release];  
48.         // also end game locally          if (playerWins)  
49.                 [self endGame];  }  
50. 
    -(void) updateTapCountLabels {  
51. playerTapCountLabel.text =          [NSString stringWithFormat:@"%d", playerTapCount];  
52. opponentTapCountLabel.text =          [NSString stringWithFormat:@"%d", opponentTapCount];  
53. }  -(void) initGame {  
54. playerTapCount = 0;  opponentTapCount = 0;  
55. }  -(void) hostGame {  
56.         [self initGame];          NSMutableData *message = [[NSMutableData alloc] init];  
57.         NSKeyedArchiver *archiver = [[NSKeyedArchiver alloc]                                                                   initForWritingWithMutableData:message];  
58.         [archiver encodeBool:YES forKey:START_GAME_KEY];          [archiver finishEncoding];  
59.         NSError *sendErr = nil;          [gkSession sendDataToAllPeers: message  
60.                                          withDataMode:GKSendDataReliable error:&sendErr];          if (sendErr)  
61.                 NSLog (@"send greeting failed: %@", sendErr);          // change state of startQuitButton  
62. startQuitButton.text = @"Quit";          [message release];  
63.         [archiver release];          [self updateTapCountLabels];  
64. }  -(void) joinGame {  
65.         [self initGame];  startQuitButton.text = @"Quit";  
66.         [self updateTapCountLabels];  }  
67. 
    //一下是代理方法  
68. 
    -(GKSession *) peerPickerController: (GKPeerPickerController*) controller  
69.                   sessionForConnectionType: (GKPeerPickerConnectionType) type {          if (!gkSession) {//如果没有链接时建立连接  
70. gkSession = [[GKSession alloc]                                           initWithSessionID:AMIPHD_P2P_SESSION_ID//根据此值判断用的是什么链接  
71.                                          displayName:nil//在线用户名                                           sessionMode:GKSessionModePeer];  
72. gkSession.delegate = self;          }  
73.         return gkSession;  }  
74. 
    - (void)peerPickerController:(GKPeerPickerController *)picker didConnectPeer:(NSString *)peerID toSession:(GKSession *)session  
75. {//当picker接收到数据后将其释放掉，否则进入不了界面          [picker dismiss];  
76. picker.delegate = nil;          [picker autorelease];  
77. }  - (void)session:(GKSession *)session  
78. didReceiveConnectionRequestFromPeer:(NSString *)peerID {//已接受连接请求的代理方法  actingAsHost = NO;//设为客户端  
79. }  
80. - (void)session:(GKSession *)session peer:(NSString *)peerID  didChangeState:(GKPeerConnectionState)state {//状态改变时触发的代理方法  
81.         switch (state)          {  
82.                 case GKPeerStateConnected:                          [session setDataReceiveHandler: self withContext: nil];  
83. opponentID = peerID;//改变opponentID的值                          actingAsHost ? [self hostGame] : [self joinGame];//  
84.                         break;          }  
85. }  
86. - (void) receiveData: (NSData*) data fromPeer: (NSString*) peerID                     inSession: (GKSession*) session context: (void*) context {//接受数据时的代理操作  
87.         NSKeyedUnarchiver *unarchiver =          [[NSKeyedUnarchiver alloc] initForReadingWithData:data];  
88.         if ([unarchiver containsValueForKey:TAP_COUNT_KEY]) {  opponentTapCount = [unarchiver decodeIntForKey:TAP_COUNT_KEY];  
89.                 [self updateTapCountLabels];          }  
90.         if ([unarchiver containsValueForKey:END_GAME_KEY]) {                  [self endGame];  
91.         }          if ([unarchiver containsValueForKey:START_GAME_KEY]) {  
92.                 [self joinGame];          }  
93.         [unarchiver release];  }  
94. //以上是代理方法  
95. -(void) showEndGameAlert {          BOOL playerWins = playerTapCount> opponentTapCount;  
96.         UIAlertView *endGameAlert = [[UIAlertView alloc]                                                                   initWithTitle: playerWins ? @"Victory!" : @"Defeat!"  
97.                                                                  message: playerWins ? @"Your thumbs have emerged supreme!":                                                                   @"Your thumbs have been laid low"  
98.                                                                  delegate:nil                                                                   cancelButtonTitle:@"OK"  
99.                                                                  otherButtonTitles:nil];          [endGameAlert show];  
100.         [endGameAlert release];  }  
101. -(void) endGame {  opponentID = nil;  
102. startQuitButton.text = @"Find";          [gkSession disconnectFromAllPeers];  
103.         [self showEndGameAlert];  }  
104. 
     /*  
105. // The designated initializer. Override to perform setup that is required before the view is loaded.  - (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil {  
106.     if (self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil]) {          // Custom initialization  
107.     }      return self;  
108. }  */  
109. 
     /*  
110. // Implement loadView to create a view hierarchy programmatically, without using a nib.  - (void)loadView {  
111. }  */  
112. 
     /*  
113. // Implement viewDidLoad to do additional setup after loading the view, typically from a nib.  - (void)viewDidLoad {  
114.     [super viewDidLoad];  }  
115. */  
116. /*  // Override to allow orientations other than the default portrait orientation.  
117. - (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation {      // Return YES for supported orientations  
118.     return (interfaceOrientation == UIInterfaceOrientationPortrait);  }  
119. */  
120. - (void)didReceiveMemoryWarning {          // Releases the view if it doesn't have a superview.  
121.     [super didReceiveMemoryWarning];  
122.         // Release any cached data, images, etc that aren't in use.  }  
123. 
     - (void)viewDidUnload {  
124.         // Release any retained subviews of the main view.          // e.g. self.myOutlet = nil;  
125. }  
126. - (void)dealloc {          [opponentID release];  
127.         [playerTapCountLabel release];          [opponentTapCountLabel release];  
128. 
     
129.         [startQuitButton release];          [gkSession release];  
130.     [super dealloc];  }

[/pre]小结：iPhone开发之GameKit蓝牙实例讲解的内容介绍完 ，希望通过本文的学习能对你有所帮助！