swift button hide/show not working - swift

Question

I have the view.
When I click on the btnStartWork, I want to the button is set to hidden (worked) and the label startTime show the start time(worked) and the btnEndWork is showing (worked).
When I clicked on the btnEndWork I no button is hidden and btnEndWork is still showing. Also he set to the endTime Label the end time but update the startTime too. That is really wired.
class FirstViewController: UIViewController {
#IBOutlet weak var startTime: UILabel!
#IBOutlet weak var endTime: UILabel!
#IBOutlet weak var btnStartWorkLabel: UIButton!
#IBOutlet weak var btnEndWorkLabel: UIButton!
#IBAction func btnStartWork(_ sender: Any) {
let currentdate = Date()
let dateFormatter = DateFormatter()
dateFormatter.dateFormat = "HH:mm"
let convertedDate = dateFormatter.string(from: currentdate)
startTime.text = "\(convertedDate)"
btnStartWorkLabel.isHidden = true
btnEndWorkLabel.isHidden = false
}
#IBAction func btnEndWork(_ sender: Any) {
let currentdate = Date()
let dateFormatter = DateFormatter()
dateFormatter.dateFormat = "HH:mm"
let convertedDate = dateFormatter.string(from: currentdate)
endTime.text = "\(convertedDate)"
btnStartWorkLabel.isHidden = false
btnEndWorkLabel.isHidden = true
}
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view, typically from a nib.
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
}
Update Question
How could I save the times, to work with both times, when the btnEndWork is clicked?

Answer 1

Sounds like it is wired wrong, look at the controller in interface builder for multiple connections (if you copy and paste a label or button the connection is copied too) and try adding:
print("Start button pressed")
to
#IBAction func btnStartWork(_ sender: Any)
and
print("End button pressed")
to
#IBAction func btnEndWork(_ sender: Any)
to see if the output is correct when you press the buttons.