Change the destination View Controller of a tab in a Tab Bar

Question

I really like to know how can I change the link/destination ViewController for a tab bar item in swift.

My case:

if (beforeDayX)
{
    //TabBar[0] (Home) shows my1Scene with my1ViewController 
} else
{
    // TabBar[0] (Home) shows my2Scene with my2ViewController 
}

How should I do that? Is it possible to do?

Answer 1

Note: Initial answer was creating tabBar programmatically. But since the Josep (the questioner) already have the tabBar created via Storyboard, I change the answer here to suit the need.

Assumptions:

(1) TabBar was created using UITabBarViewController. Class name: TabBarViewController

(2) Initially, the Tabbar consist of WeekendVC, WeekdayVC, OtherVC.

(3) Based on condition the Tabbar will either become: ( WeekendVC and OtherVC ) or (WeekdayVC and OtherVC ) only.

Here is what the TabBarViewController will look like:

import UIKit

enum TypeOfDay {
    case weekday
    case weekend
}

class TabBarViewController: UITabBarController {

    var typeOfDay: TypeOfDay = .weekday

    override func viewDidLoad() {
        super.viewDidLoad()

        // Initial order is: WeekendVC, WeekdayVC, OtherVC
        if let currentViewControllers = self.viewControllers {

            let weekendVC = currentViewControllers[0]
            let weekdayVC = currentViewControllers[1]
            let otherVC = currentViewControllers[2]

            switch typeOfDay {
            case .weekend:
                self.viewControllers = [weekendVC, otherVC]
            case .weekday:
                self.viewControllers = [weekdayVC, otherVC]
            }
        }
    }
}