iOS 6 - can i return data when i unwind a segue?

Question

I have created a simple unwind segue using the storyboard tools. I have created the following event handler in the view I want to unwind to:

-(IBAction)quitQ         


        

Answer 1

Passing data between view controllers is frequently accomplished using protocols. Here's an example:

In your quiz view controller header, declare a similar protocol definition:

@protocol JBQuizViewControllerDelegate 

@required
- (void)quizController:(id)controller didQuitWithState:(NSString *)state;

@end

In your presenting view controller's prepareForSeque: method, wire up the delegate:

JBQuizViewController *destination = (JBQuizViewController *)segue.destinationViewController;
destination.delegate = self;

Then, in your presenting view controller, handle the delegate protocol's quizController:didQuitWithState: method.

Finally, once the user quits your quiz, you should notify the delegate using the protocol, passing in the state or whatever data you want to expose.