Increment tab bar badge w/ UIAlertAction swift?

Question

@IBAction func addToCart(sender: AnyObject) {
    let itemObjectTitle = itemObject.valueForKey(\"itemDescription\") as! String
    let alertController = UIAlertContr         


        

Answer 1

You can try to access the badgeValue and convert it to Integer as follow:

Swift 2

if let badgeValue = tabBarController?.tabBar.items?[1].badgeValue,
    nextValue = Int(badgeValue)?.successor() {
    tabBarController?.tabBar.items?[1].badgeValue = String(nextValue)
} else {
    tabBarController?.tabBar.items?[1].badgeValue = "1"
}

Swift 3 or later

    if let badgeValue = tabBarController?.tabBar.items?[1].badgeValue,
        let value = Int(badgeValue) {
        tabBarController?.tabBar.items?[1].badgeValue = String(value + 1)
    } else {
        tabBarController?.tabBar.items?[1].badgeValue = "1"
    }

To delete the badge just assign nil to the badgeValue overriding viewDidAppear method:

override func viewDidAppear(animated: Bool) {
    tabBarController?.tabBar.items?[1].badgeValue = nil
}