UIDatePicker upon date changed

Question

I have just started using UIDatePicker in my iPad app, but is there a way of checking when the date has been changed?

I want to do something when the date is changed. What can I try?

Answer 1

When properly configured, a UIDatePicker object sends an action message when a user finishes rotating one of the wheels to change the date or time; the associated control event is UIControlEventValueChanged.

so you need to add your class to handle UIControlEventValueChanged event in your picker:

[picker addTarget:self action:@selector(dateChanged:)                forControlEvents:UIControlEventValueChanged]; ...  - (void) dateChanged:(id)sender{    // handle date changes } 

Answer 2

Swift 4 version:

UIDatePicker Setup:

let datePicker = UIDatePicker() datePicker.datePickerMode = .date dateTextField.inputView = datePicker datePicker.addTarget(self, action: #selector(datePickerChanged(picker:)), for: .valueChanged) 

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Function:

@objc func datePickerChanged(picker: UIDatePicker) {     print(picker.date) } 

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If you notice, Swift 4 requires @objc in the function if you're going to use #selector()