Navigation with a huge memory footpring

Navigator.m

@implementation CBNavigator

int currentPage = -1;

-(void)viewDidAppear:(BOOL)animated{
    NSLog(@"Navigator appeared");
    if(currentPage == -1){
        currentPage++;
        UIViewController *nextPageVC = [self.storyboard instantiateViewControllerWithIdentifier:[NSString stringWithFormat:@"%d", currentPage ]];
        [self presentModalViewController:nextPageVC animated:YES];
        [nextPageVC.view addSubview:self.view];
    }
    
}

-(IBAction)goToNextPage{    
    [self dismissViewControllerAnimated:YES completion:^{
        NSLog(@"dismissed!");
        currentPage++;
        UIViewController *nextPageVC = [self.storyboard instantiateViewControllerWithIdentifier:[NSString stringWithFormat:@"%d", currentPage ]];
        [self presentModalViewController:nextPageVC animated:YES];
        [nextPageVC.view addSubview:self.view];
        
        
        NSLog(@"Current Page is %d", currentPage);
        
    }];
    
}