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)quitQuiz:(UIStoryboardSegue *)segue {     NSLog(@"SEGUE unwind"); } 

This fires correctly and unwinds the segue (the message gets logged).

When the user quits the quiz I would like to pass some data back and have been struggling with how to achieve this. Can anyone advise?

Answer 1

Thanks Jeff. After watching WWDC video 407 I have a clear solution.

In the view controller that is the target of the unwind you should create a method that takes a single UIStoryboardSegue parameter and returns an IBAction. The UIStoryboardSegue has a method to return the source view controller! Here is the example taken from the video (credit to Apple).

- (IBAction)done:(UIStoryboardSegue *)segue {     ConfirmationViewController *cc = [segue sourceViewController];     [self setAccountInfo:[cc accountInfo]];     [self setShowingSuccessView:YES]; } 

Answer 2

Getting data back from an unwind segue is explained very nicely in this apple talk, second half of the presentation (edit: starts from 37:20)

In particular, in an unwind segue the [segue sourceViewController] is the still active view controller from which the unwind event originated, so just access your properties as usual.