TabBarController instance Swift 2.0

Question

I am trying to Compile my app again now that Swift 2 is out and the thing is I am having an error with TabBarController instances.

I am declaring the instances in vars in order to use methods from anothers ViewControllers.

Here it's my code:

let barViewControllers = self.tabBarController?.viewControllers 
let listViewController = barViewControllers![2].viewControllers![0] as! dbViewController //The [2] is because it's the third TabBar and the [0] it's because It's embebed in a NavigationController.
let calendarViewController = barViewControllers![1] as! CalendarViewController

In the second line Im having the following error:

UIViewController does not have a member named "viewControllers"

Anybody could help me?

Thanks

Answer 1

You are trying to access the property viewControllers of the type UIViewController, which it doesn't have. viewControllers is a property on a UITabBarController, but viewControllers returns an array of UIViewController.

Cast viewControllers to an array of UITabBarController (or only the item you extract) to access it's viewController property.

Like this:

let barViewControllers = self.tabBarController?.viewControllers as! [UITabBarController]

Or this:

let listViewController = (barViewControllers![2] as! UITabBarController).viewControllers![0] as! dbViewController