////  ViewController.h//  GameKitDemo////  Created by Fox on 12-3-14.//  Copyright (c) 2012年 __MyCompanyName__. All rights reserved.//

#import <UIKit/UIKit.h>#import <GameKit/GKSession.h>#import <GameKit/GKPeerPickerController.h>

@interface ViewController : UIViewController<GKSessionDelegate,GKPeerPickerControllerDelegate>{

    GKSession *currentSession;//GKSession对象用于表现两个蓝牙设备之间连接的一个会话，你也可以使用它在两个设备之间发送和接收数据。

    IBOutlet UITextField *txtMessage;        IBOutlet UIButton *connect;    IBOutlet UIButton *disconnect;

}

@property (nonatomic, retain) GKSession *currentSession;@property (nonatomic, retain) UITextField *txtMessage;@property (nonatomic, retain) UIButton *connect;@property (nonatomic, retain) UIButton *disconnect;

-(IBAction) btnSend:(id) sender;-(IBAction) btnConnect:(id) sender;-(IBAction) btnDisconnect:(id) sender;-(void)mySendDataToPeers:(NSData *)data;

@end

////  ViewController.m//  GameKitDemo////  Created by Fox on 12-3-14.//  Copyright (c) 2012年 __MyCompanyName__. All rights reserved.//

#import "ViewController.h"#import <GameKit/GKPeerPickerController.h>

@implementation ViewController@synthesize currentSession;@synthesize connect;@synthesize disconnect;@synthesize txtMessage;

GKPeerPickerController *picker;//GKPeerPickerController类提供了一个标准的UI使的应用程序发现并连接到其它蓝牙设备

- (void)viewDidLoad{    [connect setHidden:NO];    [disconnect setHidden:YES];    [super viewDidLoad];// Do any additional setup after loading the view, typically from a nib.}

- (void)dealloc {    [txtMessage release];    [currentSession release];

    [super dealloc];

}

/* *建立回话后，开始发送信息*/-(IBAction) btnSend:(id) sender{    NSData* data;    NSString *str = [NSString stringWithString:txtMessage.text];    data = [str dataUsingEncoding: NSASCIIStringEncoding];    [self mySendDataToPeers:data];}

/* *利用GKPeerPickerController框架搜索附近的蓝牙设备*/-(IBAction) btnConnect:(id) sender{

    picker= [[GKPeerPickerController alloc] init];    picker.delegate = self;    picker.connectionTypesMask = GKPeerPickerConnectionTypeNearby;//connectionTypesMask用户可以选择的连接类型，包括两种类型：GKPeerPickerConnectionTypeNearby和GKPeerPickerConnectionTypeOnline。对于蓝牙通信，使用GKPeerPickerConnectionTypeNearby常量，GKPeerPickerConnectionTypeOnline常量表示基于互联网的连接。    [connect setHidden:YES];    [disconnect setHidden:NO];    [picker show];

}

/* *从一个Apple设备中断开连接*/-(IBAction) btnDisconnect:(id) sender{    [self.currentSession disconnectFromAllPeers];    [self.currentSession release];    currentSession = nil;    [connect setHidden:NO];    [disconnect setHidden:YES];

}

/* *检测到远程蓝牙设备，用户选择并连接到其中一个蓝牙设备时调用该函数*/- (void)peerPickerController:(GKPeerPickerController *)picker didConnectPeer:(NSString *)peerID toSession:(GKSession *) session {

    self.currentSession = session;//将蓝牙连接的回话session保存为当前的session    session.delegate = self;    [session setDataReceiveHandler:self withContext:nil];    picker.delegate = nil;    [picker dismiss];    [picker autorelease];}

/* *点击取消时调用该函数*/ - (void)peerPickerControllerDidCancel:(GKPeerPickerController *)picker{

    picker.delegate = nil;    [picker autorelease];    [connect setHidden:NO];    [disconnect setHidden:YES];}

/* *设备连接或断开连接时调用该方法*/- (void)session:(GKSession *)session peer:(NSString *)peerID didChangeState:(GKPeerConnectionState)state {switch (state){case GKPeerStateConnected:             NSLog(@"connected");break;

case GKPeerStateDisconnected:             NSLog(@"disconnected");            [self.currentSession release];            currentSession = nil;            [connect setHidden:NO];            [disconnect setHidden:YES];break;default:break;        }}

/* *向连同的一端发送数据*/-(void)mySendDataToPeers:(NSData *) data{if (currentSession)    [self.currentSession sendDataToAllPeers:data withDataMode:GKSendDataReliable error:nil];}

/* *接受发送过来的数据*/-(void)receiveData:(NSData *)data fromPeer:(NSString *)peer inSession:(GKSession *)session context:(void *)context {

    NSString* str;    str = [[NSString alloc] initWithData:data encoding:NSASCIIStringEncoding];    UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"Data received"                                                    message:strdelegate:self                                          cancelButtonTitle:@"OK"                                          otherButtonTitles:nil];    [alert show];    [alert release];}

@end