How to load a UIViewController conditionally using storyboard and xcode 4.2

I have a screen in which a user can choose a set of meals - once the meals have been chosen the application fetches results form a database and displays a list of them. Now, I would like to implement a condition to decide whether the next screen should be loaded or not - ie. if there's no internet connection then show an alert and don't display the next screen etc.

I've implemented a system to check whether there is an internet connection or not but I'm not sure how and where to decide of the next screen should be loaded. Any ideas?

Thanks,

Solution

I solved this issue using the answers from: Prevent segue in prepareForSegue method? by linking the segue to my main view controller, then attaching an IBAction to the button that was originally the segue initiator and performing the logic in that method. If it all cleared then I call [self performSegueWithIdentifier:@"results" sender:self];