UILabel won't update - ios

Question

I need enlightenment with my view controllers. The first view controller has a UILabel and a UIButton. The UIButton leads to the second view controller.
The second view controller is a UITableView. Everything in this view is done programmatically including the UINavigationBar, UINavigationItem, and the UIBarButtonItem. It has NO UINavigationController.
So once a user selects a currency from the list, it should update the UILabel in the first view controller. But it won't.
first view controller .h:
#import <UIKit/UIKit.h>
#import "CurrencyListViewController.h"
#interface InformationViewController : UIViewController <CurrencyListViewControllerDelegate>
#property (nonatomic, retain) IBOutlet UILabel *currencyLabel;
- (IBAction)currencyButton;
#end
first view controller .m:
- (void)viewDidLoad
{
[super viewDidLoad];
[self createCurrencyButton];
[self createAcceptDeclineButton];
[self createCurrencyLabel];
}
- (IBAction)currencyButton
{
CurrencyListViewController *currencyView = [[CurrencyListViewController alloc] initWithNibName:#"CurrencyListViewController" bundle:nil];
currencyView.modalTransitionStyle = UIModalTransitionStyleFlipHorizontal;
currencyView.delegate = self;
[self presentViewController:currencyView animated:YES completion:nil];
}
- (void)createCurrencyLabel
{
currencyLabel = [[UILabel alloc] initWithFrame:CGRectMake(100.0, 100.0, 120.0, 40.0)];
currencyLabel.hidden = NO;
currencyLabel.textColor = [UIColor whiteColor];
currencyLabel.textAlignment = NSTextAlignmentCenter;
[currencyLabel setEnabled:NO];
[self.view addSubview:currencyLabel];
}
- (void)currencySelected: (NSString *)currencySelected
{
currencyLabel.text = [NSString stringWithFormat:#"%#", currencySelected];
NSLog(#"Current currency is %#", currencyLabel.text);
}
second view controller .h:
#import <UIKit/UIKit.h>
#protocol CurrencyListViewControllerDelegate <NSObject>
- (void)currencySelected: (NSString *)currencySelected;
#end
#interface CurrencyListViewController : UIViewController <UITableViewDataSource, UITableViewDelegate> {
id<CurrencyListViewControllerDelegate> delegate;
}
#property (nonatomic, retain) UITableView *tableView;
#property (nonatomic, assign) id delegate;
#end
second view controller .m:
- (void)viewDidLoad
{
[super viewDidLoad];
UINavigationBar *navigationBar = [[UINavigationBar alloc] initWithFrame:CGRectMake(0.0, 0.0, 320.0, 44.0)];
UINavigationItem *navigationItem = [[UINavigationItem alloc] initWithTitle:#"Currency"];
UIBarButtonItem *barItem = [[UIBarButtonItem alloc] initWithTitle: #"Cancel"
style:UIBarButtonItemStylePlain
target:self
action:#selector(cancelButtonPressed:)];
navigationItem.rightBarButtonItem = barItem;
UITableView *tableView = [[UITableView alloc] initWithFrame:CGRectMake(0.0, 44.0, self.view.frame.size.width, self.view.frame.size.height - navigationBar.frame.size.height) style:UITableViewStylePlain];
self.tableView = tableView;
[navigationBar pushNavigationItem:navigationItem animated:NO];
[self.view addSubview:tableView];
[self.view addSubview:navigationBar];
[self showCurrencies];
self.tableView.dataSource = self;
self.tableView.delegate = self;
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
static NSString *CellIdentifier = #"Cell";
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
if (cell == nil) {
cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier];
}
cell.textLabel.text = [arrayOfCurrencies objectAtIndex:indexPath.row];
return cell;
}
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
InformationViewController *informationViewController = [[InformationViewController alloc] init];
if ([_delegate respondsToSelector:#selector(currencySelected:)]) {
informationViewController.modalTransitionStyle = UIModalTransitionStyleFlipHorizontal;
[_delegate currencySelected:[arrayOfCurrencies objectAtIndex:indexPath.row]];
NSLog(#"The user selects %#", [arrayOfCurrencies objectAtIndex:indexPath.row]);
}
[self presentViewController:informationViewController animated:YES completion:nil];
}
I am able to output:
2013-06-05 00:16:58.731 Testing[7056:c07] Current currency is AOA: Angolan Kwanza
2013-06-04 19:08:27.222 Testing[3613:c07] 2013-06-05 00:16:58.732 Testing[7056:c07] The user selects AOA: Angolan Kwanza
But the UILabel in my first view controller will NOT.

Answer 1

Why are presenting informationViewController again? dismiss the Current ViewController, which is CurrencyListViewController and do the currencySelected function
Should look like this:
[self dismissModalViewControllerAnimated:YES];
[_delegate currencySelected:[arrayOfCurrencies objectAtIndex:indexPath.row]];