Question

I am working in tabBar based iPhone app.

• I have 5 UIViewControllers in tabbar controller.
• In my application I have used APNS. When APNS received I want to update data in UIViewController 4.
• If the user working in UIViewControllers 1,2,3 and 5 i want to update the data in UIViewController 4 and show badges.
• I refresh and updated the data in UIViewController 4 but I want to show the badge if the user not in the UIViewController 4.
• If the user currently in UIViewController 4 i don’t want to show the badges.

How can i find another one UIViewController is in active or inactive from some other UIViewController?

Edit

I have tried below code to get the selectedIndex of UITabBarController.

AppDelegate *appDelegate = (AppDelegate *)[[UIApplication sharedApplication] delegate];
NSLog(@"%d", appDelegate.tabBarController.selectedIndex);

Answer 1

Since you are working with a UITabBarController you can easily ask for the currently selected tab which should result in the active view controller. Try the methods:
selectedViewController or
selectedIndex