How do I set selected tab in UITabBarController using StoryBoard?

Question

How can I switch to some tab in UITabBarController using StoryBoard? I have tried the code below but without success (the tab is not selected):

Answer 1

I'm using IBInspected in LSwift:

extension UITabBarController {
    @IBInspectable var selected_index: Int {
        get {
            return selectedIndex
        }
        set(index) {
            selectedIndex = index
        }
    }
}