Bluetooth

I am trying to setup my game so that when one user selects a mode/button, the other user cannot select that mode/button, and have to choose the other button. I am using bluetooth connection, and it almost works, but no matter what the user chooses, it just hides my attack button. I have two buttons, attackButton and hungerButton. (I have the GameKit Framework included.) PLEASE HELP ME!

My .h file:

Code:

#import <UIKit/UIKit.h>

#import <GameKit/GameKit.h>

#import "Definitions.h"



@interface Multiplayer : UIViewController <UIApplicationDelegate, GKPeerPickerControllerDelegate, GKSessionDelegate> {

    GKPeerPickerController  *mPeerPicker;

    GKSession               *mSession;



    IBOutlet UILabel *chosenMode;



    IBOutlet UIButton *attackButton;

    IBOutlet UIButton *hungerButton;



    NSTimer *checkToSeeWhatMode;



    int whatbuttontohidecounter;



}



-(IBAction)attack;

-(IBAction)hunger;





@property (nonatomic, retain) GKPeerPickerController    *mPeerPicker;

@property (nonatomic, retain ) GKSession                *mSession;

-(void) nullifySession;





@end

My .m file

Code:

#import "Multiplayer.h"



@implementation Multiplayer

@synthesize mPeerPicker, mSession;





-(IBAction)attack {

    [self.mSession sendDataToAllPeers:[@"YES" dataUsingEncoding:NSStringEncodingConversionAllowLossy] withDataMode:GKSendDataReliable error:nil];



}



-(IBAction)hunger {

    [self.mSession sendDataToAllPeers:[@"NO" dataUsingEncoding:NSStringEncodingConversionAllowLossy] withDataMode:GKSendDataReliable error:nil];





}



-(void)viewDidLoad {







    if(mSession){

    }else{

        self.mPeerPicker = [[GKPeerPickerController alloc] init];

        mPeerPicker.delegate = self;

        mPeerPicker.connectionTypesMask = GKPeerPickerConnectionTypeNearby;

        [mPeerPicker show];

    }

    }



- (GKSession *)peerPickerController:(GKPeerPickerController *)picker sessionForConnectionType:(GKPeerPickerConnectionType)type{  

    self.mSession = [[GKSession alloc] initWithSessionID:@"MySession" displayName:nil sessionMode:GKSessionModePeer];

    mSession.delegate = self;

    return mSession;

}



- (void)peerPickerControllerDidCancel:(GKPeerPickerController *)picker{

    [self nullifySession];

}



- (void)session:(GKSession *)session didFailWithError:(NSError *)error{

    [self nullifySession];

}



- (void)peerPickerController:(GKPeerPickerController *)picker didConnectPeer:(NSString *)peerID toSession:(GKSession *)session{

    [mSession setDataReceiveHandler:self withContext:NULL];

    [mPeerPicker dismiss];

    self.mPeerPicker = nil;

}



- (void) receiveData:(NSData *)data fromPeer:(NSString *)peer inSession: (GKSession *)session context:(void *)context{

   chosenMode.text = [NSString stringWithFormat:@"%@" ,/*[mSession displayNameForPeer:peer],*/ [NSString stringWithUTF8String:[data bytes]]];

    checkToSeeWhatMode = [NSTimer scheduledTimerWithTimeInterval:0.01

                                                          target:self selector:@selector(whatModeIsTaken)userInfo:nil repeats:YES];



    }



-(void)whatModeIsTaken {



   attackButton.hidden = [NSString stringWithFormat:@"%@",chosenMode.text];



    if (attackButton.hidden == YES) {

        hungerButton.hidden = NO;

    }



    }



-(void) nullifySession{

    if(mSession) {

        [mSession disconnectFromAllPeers]; 

        [mSession setDataReceiveHandler: nil withContext: NULL]; 

        self.mSession = nil;

    }

}





- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation

{

    // Return YES for supported orientations

    return (interfaceOrientation == UIInterfaceOrientationPortrait);

}



@end