Is it possible for a button to open into a specific tab when using the Tab Bar Controller?

Question

The question is a little confusing to articulate so hopefully an image will be a little more helpful. Here's the setup:

So, I want the First View button to open the FirstViewController, and I want the Second View button to open the SecondViewController. If I link the Second View button to the SecondViewController like this:

I lose the tab navigation. And if I connect the button to the TabViewController like this:

then it will automatically open into the FirstViewController. Unless I'm missing something, it seems like this would need to be done with a little extra code but I cannot seem to find anything that explains how to do this.

Thank you!

Answer 1

Create storyboard segue from Viewcontroller to TabBarController with an identifier. Then assign selelctedIndex value of TabBarController in prepareforsegue method

@IBAction func firstBtnAction(_ sender: Any) {
    (sender as! UIButton).tag = 0
    performSegue(withIdentifier: "tabBar", sender: sender)
}
@IBAction func secBtnAction(_ sender: Any) {
    (sender as! UIButton).tag = 1
    performSegue(withIdentifier: "tabBar", sender: sender)
}

override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
    if segue.identifier == "tabBar" {
        if let vc = segue.destination as? UITabBarController {
            vc.selectedIndex = (sender as! UIButton).tag
        }
    }
}