datepicker update value in two differents UIButton - ios

Question

I'm trying to update two buttons with datepicker. Button startDate et endDate. I don't how can I update these butttons with differents datepicker.
Maybe with handler ?
user story : the user click on startDat datepicker is displaying, user choose any date or time, then click on endDate and same action.
EDIT:
class ViewController: UIViewController {
#IBOutlet weak var dateTextField: UITextField!
#IBOutlet weak var dateTextLabel: UILabel!
var whoTriggeredPickerView: UIButton?
#IBOutlet weak var startDateTextButton : UIButton!
#IBOutlet weak var endDateTextButton : UIButton!
#IBOutlet weak var datePick : UIDatePicker!
override func viewDidLoad() {
super.viewDidLoad()
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
func donePressed(_ sender: UIBarButtonItem) {
dateTextField.resignFirstResponder()
dateTextLabel.resignFirstResponder()
startDateTextButton.resignFirstResponder()
endDateTextButton.resignFirstResponder()
}
func donePressedButton(_ sender :UIButton){
startDateTextButton.resignFirstResponder()
endDateTextButton.resignFirstResponder()
}
func tappedToolBarBtn(_ sender: UIBarButtonItem) {
let dateformatter = DateFormatter()
startDateTextButton.setTitle(dateformatter.string(from: Date()), for: .normal)
endDateTextButton.setTitle(dateformatter.string(from: Date()), for: .normal)
startDateTextButton.resignFirstResponder()
endDateTextButton.resignFirstResponder()
}
func closeDatePicker(){
self.view.endEditing(true)
}
override func touchesBegan(_ touches: Set<UITouch>, with event: UIEvent?) {
closeDatePicker()
}
#IBAction func BtnClicked(sender: UIButton) {
let datePickerView: UIDatePicker = UIDatePicker()
datePickerView.datePickerMode = UIDatePickerMode.date
//sender.inputView = datePickerView
self.view.addSubview(datePickerView)
datePickerView.addTarget(self, action: #selector(ViewController.datePickerValueChanged), for: UIControlEvents.valueChanged)
self.whoTriggeredPickerView = sender
}
func datePickerValueChanged(_ sender: UIDatePicker) {
let dateFormatter = DateFormatter()
dateFormatter.dateStyle = DateFormatter.Style.medium
dateFormatter.timeStyle = DateFormatter.Style.none
//dateTextField.text = dateFormatter.string(from: sender.date)
if self.whoTriggeredPickerView == startDateTextButton {
// set startDateBtn title
startDateTextButton.setTitle(dateFormatter.string(from: Date()), for: .normal)
}else if self.whoTriggeredPickerView == endDateTextButton {
// set endDateBtn title
endDateTextButton.setTitle(dateFormatter.string(from: Date()), for: .normal)
}
}
}

Answer 1

For your question:
You can create a tmp variable to record picker is triggered by which button. Then you can decide which button's title you want to set.
//In your view controller:
var whoTriggeredPickerView: UIButton?
//In your BtnClicked function:
self.whoTriggeredPickerView = sender
//Then in datePickerValueChanged function:
if self.whoTriggeredPickerView == StartDateButton {
// set startDateBtn title
}else if self.whoTriggerPickerView == endDateButton {
// set endDateBtn title
}
Some suggestions:
always lowercase the instance name, you are using DatePick as the instance name of UIDatePicker, instead, you should name it as datePicker; for function names as well.
for your case you can use two textfields instead of buttons.
let datePicker = UIDatePicker()
datePicker.addTarget(self, action: #selector(dateChanged), for: .valueChanged)
startDateTextField.inputView = datePicler
endDateTextField.inputView = datePicker