increment/decrement the value of a label with two buttons - swift

Question

being new of swift means that I have issues with two buttons to increment the value of a label.I'm stuck because the increment button works but the decrement button doesn't. the value that I want to store inside the label decrease but the label doesn't update. here's the code, thank you
PS: all those isEnabled = true or false are only to disable the buttons to be able create a range from 0 to 5
class ViewController: UIViewController {
var incDec = 0;
#IBOutlet weak var countLbl: UILabel!
#IBOutlet weak var decBtn: UIButton!
#IBOutlet weak var incBtn: UIButton!
override func viewDidLoad() {
super.viewDidLoad()
}
#IBAction func tapDec(_ sender: Any) {
if(incDec >= -1){
incDec -= 1;
self.countLbl.text = "\(incDec)"
decBtn.isEnabled = true
}
else{
self.countLbl.text = "\(incDec)"
decBtn.isEnabled = false
incBtn.isEnabled = true
}
}
#IBAction func tapInc(_ sender: Any) {
if(incDecVal < 5){
incDec += 1;
self.countLbl.text = "\(incDec)"
incBtn.isEnabled = true
}
else{
self.countLbl.text = "\(incDec)"
incBtn.isEnabled = false
decBtn.isEnabled = true
}
}
}

Answer 1

You have to modify the logic of enabling and disabling the buttons. Here is the code.
class ViewController: UIViewController {
var incDecVal = 0;
#IBOutlet weak var countLbl: UILabel!
#IBOutlet weak var decBtn: UIButton!
#IBOutlet weak var incBtn: UIButton!
override func viewDidLoad() {
super.viewDidLoad()
countLbl.text = "\(incDecVal)"
}
#IBAction func tapDec(_ sender: Any) {
if(incDecVal > 0){
incDecVal = incDecVal - 1;
}
decBtn.isEnabled = incDecVal == 0 ? false : true
incBtn.isEnabled = true
self.countLbl.text = "\(incDecVal)"
}
#IBAction func tapInc(_ sender: Any) {
if(incDecVal <= 5) {
incDecVal = incDecVal + 1;
}
incBtn.isEnabled = incDecVal == 5 ? false : true
decBtn.isEnabled = true
self.countLbl.text = "\(incDecVal)"
}
}