Accessing a view controller from App delegate class

[blueFLoyd8]

Good afternoon everyone.
I'm trying to refresh a list from another class. There is a view controller class that adds the list controller class as a subview. I wrote a method in the App delegate that gets the list's view controller class. I'm getting a warning from this code, and the App will crash when it reaches the line in bold

Warning: tabBarItemController may not respond to '-getListViewController'
I used getter/setter methods so that listViewController should be available. So I think the problem might be how I am getting the view controller from the tabBarController.

- (void) refresListViewController {
	NSLog(@"Delegate: getting View Controller");
	tabBarItemController *vc = [tabBarController.viewControllers objectAtIndex:1];  // This might be the problem line
	if (vc != nil) {
		NSLog(@"Delegate: getting listView controller");
		ObjectListController *objViewController = [vc getListViewController]; // CODE CRASHES HERE. GETS WARNING
		[objViewController refreshTable];
	} else {
		NSLog(@"Delegate: Error, unable to get ListViewController");
	}
}

[perimeter]

I think you need to cast.

ViewController *vc = // from the tabBar class
TBIViewController *tbi = (TBIViewController *) vc;

//

and then proceed with your logic.