iphone開發-Peer-to-Peer Connectivity used by Bluetooth

最近寫過wifi 也有看到怎麼用藍芽來建立雙方連線 順便記錄一下

GamekitTestViewController.h

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

@interface GameKitTestViewController :
//用GKPeerPickerControllerDelegate 協定
UIViewController <GKPeerPickerControllerDelegate,GKSessionDelegate>
{
GKPeerPickerController *mPicker;
GKSession *mSession;
IBOutlet UITextField *mTextField;
IBOutlet UITextView *mTextView;
NSMutableArray *mPeers;
}
-(IBAction) connectClicked:(id)sender;
-(IBAction) sendData:(id)sender;
@property (retain) GKSession *mSession;

@end

GameKitTestViewController.m

#import " GameKitTestViewController.h "

@implementation GameKitTestViewController

@synthesize mSession;

- (void)viewDidLoad {
[super viewDidLoad];

mPicker=[[GKPeerPickerController alloc] init];
mPicker.delegate=self;
//使用iphone內建介面 讓user選擇要wifi or bluetooh
//但這邊須注意一點是 iphone 藍芽的部分 會自動幫你建立雙方的連線 但是透過
wifi的話 就要自己寫 可以參考我前幾篇
mPicker.connectionTypesMask = GKPeerPickerConnectionTypeNearby | GKPeerPickerConnectionTypeOnline;
mPeers=[[NSMutableArray alloc] init];
//顯示週遭有哪些peer
[mPicker show];
}

//當user選擇哪種連線時 就會呼叫下列method
- (void)peerPickerController:(GKPeerPickerController *)picker didSelectConnectionType:(GKPeerPickerConnectionType)type{
if (type == GKPeerPickerConnectionTypeOnline) {
picker.delegate = nil;
[picker dismiss];
[picker autorelease];
}
}
//當peer picker 需要session 就會呼叫此method 也就是準備session讓其他peer可以連進來
- (GKSession *)peerPickerController:(GKPeerPickerController *)picker sessionForConnectionType:(GKPeerPickerConnectionType)type{

NSString *txt=mTextField.text;
GKSession* session = [[GKSession alloc] initWithSessionID:@"test" displayName:txt sessionMode:GKSessionModePeer];
[session autorelease];
return session;
}

//當連線建立完成時 會呼叫此method
- (void)peerPickerController:(GKPeerPickerController *)picker didConnectPeer:(NSString *)peerID toSession:(GKSession *)session{

NSLog(@"Connected from %@",peerID);

self.mSession = session;
session.delegate = self;
[session setDataReceiveHandler: self withContext:nil];
picker.delegate = nil;
[picker dismiss];
[picker autorelease];
}

//這邊如同wifi 就不再敘述了
- (void)session:(GKSession *)session peer:(NSString *)peerID didChangeState:(GKPeerConnectionState)state{

switch (state)
{
case GKPeerStateConnected:
{
NSString *str=[NSString stringWithFormat:@"%@\n%@%@",mTextView.text,@"Connected from pier ",peerID];
mTextView.text= str;
NSLog(str);
[mPeers addObject:peerID];
break;
}
case GKPeerStateDisconnected:
{
[mPeers removeObject:peerID];

NSString *str=[NSString stringWithFormat:@"%@\n%@%@",mTextView.text,@"DisConnected from pier ",peerID];
mTextView.text= str;
NSLog(str);
break;
}
}
}