[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. ;  ;
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. [startQuitButton release];          [gkSession release];
129. [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！