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iOS UIDatePicker in UIDatePickerMode.countDownTimer value changed bug
import UIKit
class ViewController: UIViewController {
override func viewDidLoad() {
// Do any additional setup after loading the view, typically from a nib.
// Create a DatePicker
let datePicker: UIDatePicker = UIDatePicker()
// Posiiton date picket within a view
datePicker.frame = CGRect(x: 10, y: 50, width: self.view.frame.width, height: 200)
// Set some of UIDatePicker properties
datePicker.backgroundColor = UIColor.white
datePicker.datePickerMode = UIDatePickerMode.countDownTimer;
// Add an event to call onDidChangeDate function when value is changed.
datePicker.addTarget(self, action: #selector(ViewController.datePickerValueChanged(_:)), for: .valueChanged)
// Add DataPicker to the view
// Not called the first time
func datePickerValueChanged(_ sender: UIDatePicker){
print("Selected value \(sender.countDownDuration)")
override func didReceiveMemoryWarning() {
// Dispose of any resources that can be recreated.

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@yuv4ik yuv4ik commented Mar 20, 2017

Just reported to Apple.

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