iOS Page-Based application modification

[isak]

I have created standard Page-Based application in xCode 4.2.1
I need to change ModelController.m

It has method -

- (DataViewController *)viewControllerAtIndex:(NSUInteger)index storyboard:(UIStoryboard *)storyboard;

for each page this method create new DataViewController

DataViewController *dataViewController = [storyboard instantiateViewControllerWithIdentifier:@"DataViewController"];

I want to use only one DataViewController instance for all page in this application. To change method
viewControllerAtIndex like this:

    if (dataViewController == NULL) {
        dataViewController = [storyboard instantiateViewControllerWithIdentifier:@"DataViewController"];
 
    }
        dataViewController.dataObject = [self.pageData objectAtIndex:index];

But this does not work correctly.

Thanks for advance.

 

[dejo]

But this does not work correctly.

Doesn't work how? What are you expecting to happen? What is actually happening. Please be specific.