Notification Center

Notification Center

// Instead of using delegation for passing the data, consider using NSNotificationCenter to communicate between your view controllers in this situation.

// In your first view controller you will register to listen for a notification:

- (void)viewDidLoad
{
    [[NSNotificationCenter defaultCenter] addObserver:self 
                                             selector:@selector(handleFourthViewSubmit:)        
                                                 name:@"fourthViewSubmit" 
                                               object:nil];
}

// And create the method to be run when the notification is sent:

- (void)handleFourthViewSubmit:(NSNotification *)notification {
    NSDictionary *theData = [notification userInfo];  // theData is the data from your fourth view controller

    // pop views and process theData

}
// In your first view controller's dealloc method, be sure to un-register as an observer (to avoid potential crashes):

-(void) dealloc {
    [[NSNotificationCenter defaultCenter] removeObserver:self];
    [super dealloc];
}

// Then in your fourth view controller, broadcast the notification when the enter button is pressed:

// note: dataDict should be an NSDictionary containing the data you want to send back to your first view controller
[[NSNotificationCenter defaultCenter] postNotificationName:@"fourthViewSubmit" 
                                                    object:self 
                                                  userInfo:dataDict];