ApplicationViewController.h

    #import <UIKit/UIKit.h>

    @interface ApplicationViewController : UIViewController
    @property (weak, nonatomic) IBOutlet UITextField *personOneNameTextField;
    @property (weak, nonatomic) IBOutlet UITextField *personTwoNameTextField;
    @property (weak, nonatomic) IBOutlet UITextField *beerNumberTextField;

    - (IBAction)startDrinkingBTN:(UIButton *)sender;

    @end

ApplicationViewController.m

    #import "ApplicationViewController.h"

    @interface ApplicationViewController ()

    @end

    @implementation ApplicationViewController
    @synthesize personOneNameTextField;
@synthesize personTwoNameTextField;
@synthesize beerNumberTextField;


- (IBAction)startDrinkingBTN:(UIButton *)sender{
    //Save the users input to use on another page.
    NSString *numberOfBeers = self.beerNumberTextField.text;
    NSString *personOneName = self.personOneNameTextField.text;
    NSString *personTwoName = self.personTwoNameTextField.text;
    NSArray *details = [NSArray arrayWithObjects:numberOfBeers,personOneName,personTwoName, nil];
    [self saveInfo:details];

    NSArray *beerArray = [[Information sharedInstance] beerArray];
    NSLog(@"SetArray:%@",beerArray);

}



-(void)saveInfo:(NSArray *)array{

    [[Information sharedInstance] setBeerArray:[NSArray arrayWithArray:array]];

}


    - (void)viewDidLoad
    {

        [super viewDidLoad];
        // Do any additional setup after loading the view.
    }


DividerViewController.h


    #import <UIKit/UIKit.h>

    @interface DividerViewController : UIViewController{
    NSInteger totalBeersToBeDrunk;
    NSInteger amountDrunk;
    NSInteger drunkByPersonOne;
    NSInteger drunkByPersonTwo;
}
@property (nonatomic,retain) NSArray *beerArray;
@property (weak, nonatomic) IBOutlet UILabel *totalBeersLabel;
@property (weak, nonatomic) IBOutlet UILabel *beersLeftLabel;
@property (weak, nonatomic) IBOutlet UILabel *personOneNameLabel;
@property (weak, nonatomic) IBOutlet UILabel *personTwoNameLabel;
@property (weak, nonatomic) IBOutlet UILabel *personOneBeerCount;
@property (weak, nonatomic) IBOutlet UILabel *personTwoBeerCount;

- (IBAction)personOneStepper:(UIStepper *)sender;
- (IBAction)personTwoStepper:(UIStepper *)sender;

    @end



DividerViewController.m

#import "DividerViewController.h"

@interface DividerViewController ()

@end

@implementation DividerViewController
@synthesize totalBeersLabel;
@synthesize beersLeftLabel;
@synthesize personOneNameLabel;
@synthesize personOneBeerCount;
@synthesize personTwoNameLabel;
@synthesize personTwoBeerCount;

-(NSArray *)getArray
{
    //get beer array
    NSArray *beerArray = [[Information sharedInstance] beerArray];
    NSLog(@"GetArray:%@",beerArray);
    return beerArray;
}


- (void)viewDidLoad
{
    //assign the total beers to a labe on the view.
    NSArray *detials = [self getArray];

    totalBeersLabel.text = detials[0];

    //turn the string into an int
    totalBeersToBeDrunk = [detials[0] intValue];

    //assign names to labels.
    personOneNameLabel.text =detials[1];
    personTwoNameLabel.text =detials[2];

    [super viewDidLoad];
    // Do any additional setup after loading the view.
}


- (IBAction)personOneStepperAction:(UIStepper *)sender {
    //check make sure all the beers have not been drunk
    if (drunkByPersonOne + drunkByPersonTwo != totalBeersToBeDrunk ){

            //Change number of beers drunk by person one.
            double value = [sender value];
            [personOneLabel setText:[NSString stringWithFormat:@"%d", (int)value]];

            //set the value of the stepper to the beers drunk for person one.
            int myInt = (int)value;
            drunkByPersonOne = myInt;

            //check var
            NSLog(@" %i",drunkByPersonOne);

            //check to make sure they havent finished there beers.
            [self checkIfAllDrunk];
    }else{
        [self cantAddMoreThanDrunk];
    }

}


- (IBAction)personTwoStepperAction:(UIStepper *)sender {
    //check make sure all the beers have not been drunk
    if (drunkByPersonOne + drunkByPersonTwo != totalBeersToBeDrunk ){

            //Change number of beers drunk by person one.
            double value = [sender value];
            [personTwoLabel setText:[NSString stringWithFormat:@"%d", (int)value]];

            //set the value of the stepper to the beers drunk for person one.
            int myInt = (int)value;
            drunkByPersonTwo = myInt;

            //check var
            NSLog(@" %i",drunkByPersonTwo);

            //check to make sure they havent finished there beers.
            [self checkIfAllDrunk];

    }else{
        [self cantAddMoreThanDrunk];
    }
}

-(void)checkIfAllDrunk{
    if (drunkByPersonOne + drunkByPersonTwo == totalBeersToBeDrunk){
        NSLog(@"All beers drunk");
        [self finishedBeers];
    }


}



-(void)finishedBeers{
    //Alerts the user that they have finished and how many each person has had.
    NSString * errorString = [NSString stringWithFormat:@"You Have finished all your beers :/ \n %@ had %d \n %@ had %d" , personOneName.text, drunkByPersonOne, personTwoName.text, drunkByPersonTwo];
    UIAlertView * errorAlert = [[UIAlertView alloc] initWithTitle:nil message:errorString delegate:self cancelButtonTitle:@"OK" otherButtonTitles:nil];
    [errorAlert show];

}

-(void)cantAddMoreThanDrunk{
    //alerts the user that they have finished and can not add anymore beers.
    NSString * errorString = [NSString stringWithFormat:@"You Have finished all your beers. \n You cant add anymore."];
    UIAlertView * errorAlert = [[UIAlertView alloc] initWithTitle:nil message:errorString delegate:self cancelButtonTitle:@"OK" otherButtonTitles:nil];
    [errorAlert show];


}