Pass array from one Objective-C class to another

Im attempting to pass an array that is created in one class into another class. I can access the data but when I run count on it, it just tells me that I have 0 items inside the array.

This is where peopleArray's data is set up, it's in a different class than the code that is provided below.

[self setPeopleArray: mutableFetchResults];

for (NSString *existingItems in peopleArray) {
    NSLog(@"Name : %@", [existingItems valueForKey:@"Name"]);
}

[peopleArray retain];

This is how I get the array from another class, but it always prints count = 0

int count = [[dataClass peopleArray] count];
NSLog(@"Number of items : %d", count);

The rest of my code:

data.h

#import <UIKit/UIKit.h>
#import "People.h"

@class rootViewController;

@interface data : UIView <UITextFieldDelegate>{
    rootViewController *viewController;
    UITextField *firstName;
    UITextField *lastName;
    UITextField *phone;
    UIButton *saveButton;
    NSMutableDictionary *savedData;

    //Used for Core Data.
    NSManagedObjectContext *managedObjectContext;
    NSMutableArray *peopleArray;
}

@property (nonatomic, assign) rootViewController *viewController;
@property (nonatomic, retain) NSManagedObjectContext *managedObjectContext;
@property (nonatomic, retain) NSMutableArray *peopleArray;


- (id)initWithFrame:(CGRect)frame viewController:(rootViewController *)aController;
- (void)setUpTextFields;
- (void)saveAndReturn:(id)sender; 
- (void)fetchRecords;

@end




data.m(some of it at least)

@implementation data
@synthesize viewController, managedObjectContext, peopleArray;

- (void)fetchRecords {

    [self setupContext];

     // Define our table/entity to use
    NSEntityDescription *entity = [NSEntityDescription entityForName:@"People" inManagedObjectContext:managedObjectContext];

    // Setup the fetch request
    NSFetchRequest *request = [[NSFetchRequest alloc] init];
    [request setEntity:entity];

    // Define how we will sort the records
    NSSortDescriptor *sortDescriptor = [[NSSortDescriptor alloc] initWithKey:@"Name" ascending:NO];
    NSArray *sortDescriptors = [NSArray arrayWithObject:sortDescriptor];


    [request setSortDescriptors:sortDescriptors];
    [sortDescriptor release];

    // Fetch the records and handle an error
    NSError *error;
    NSMutableArray *mutableFetchResults = [[managedObjectContext executeFetchRequest:request error:&error] mutableCopy];


    if (!mutableFetchResults) {
        // Handle the error.
        // This is a serious error and should advise the user to restart the application
    }

    // Save our fetched data to an array
    [self setPeopleArray: mutableFetchResults];

    for (NSString *existingItems in peopleArray) {
        NSLog(@"Name : %@", [existingItems valueForKey:@"Name"]);
    }

    [peopleArray retain];
    [mutableFetchResults release];
    [request release];

    //NSLog(@"this is an array: %@", eventArray);
}

login.h

#import <UIKit/UIKit.h>
#import "data.h"


@class rootViewController, data;

@interface login : UIView <UITextFieldDelegate>{

    rootViewController *viewController;
    UIButton *loginButton;
    UIButton *newUser;
    UITextField *entry;
    data *dataClass;
}


@property (nonatomic, assign) rootViewController *viewController;
@property (nonatomic, assign) data *dataClass;

- (id)initWithFrame:(CGRect)frame viewController:(rootViewController *)aController;
- (BOOL)textFieldShouldReturn:(UITextField *)theTextField;


@end

login.m

#import "login.h"
#import "data.h"

@interface login (PrivateMethods)
- (void)setUpFromTheStart;
- (void)loadDataScreen;
-(void)login;
@end

@implementation login
@synthesize viewController, dataClass;


-(void)login{

    int count = [[dataClass peopleArray] count];
    NSLog(@"Number of items : %d", count);
}