Swift: One UITimePicker, Multiple Textfields

Question

I have a single UIDatePicker variable that has only the time. I want that to be able to set different times to different TextFields. The way I have it set up is that when I change one time, they all change.

Code:

*@IBOutlets for all the UITextFields...*

private var datePicker = UIDatePicker()

override func viewDidLoad() {
    super.viewDidLoad()

    self.setupDatePicker()
    self.setupTextFields()
}

func setupDatePicker() {
    self.datePicker.frame = CGRect(x: 0, y: 50, width: self.view.frame.width, height: 200)
    self.datePicker.timeZone = NSTimeZone.local
    self.datePicker.datePickerMode = .time
    self.datePicker.minuteInterval = 30
    self.datePicker.backgroundColor = .white
    self.datePicker.addTarget(self, action: #selector(self.timeValueChanged(_:)), for: .valueChanged)
}

func setupTextFields() {
    self.mondayOpenTF.inputView = self.datePicker
    self.mondayCloseTF.inputView = self.datePicker
    self.tuesdayOpenTF.inputView = self.datePicker
    self.tuesdayCloseTF.inputView = self.datePicker
    self.wednesdayOpenTF.inputView = self.datePicker
    self.wednesdayCloseTF.inputView = self.datePicker
    self.thursdayOpenTF.inputView = self.datePicker
    self.thursdayCloseTF.inputView = self.datePicker
    self.fridayOpenTF.inputView = self.datePicker
    self.fridayCloseTF.inputView = self.datePicker
    self.saturdayOpenTF.inputView = self.datePicker
    self.saturdayCloseTF.inputView = self.datePicker
    self.sundayOpenTF.inputView = self.datePicker
    self.sundayCloseTF.inputView = self.datePicker
}

@objc
func timeValueChanged(_ sender: UIDatePicker) {
    let dateFormatter: DateFormatter = DateFormatter()
    dateFormatter.dateFormat = "h:mm a"
    let date: String = dateFormatter.string(from: sender.date)

    self.mondayOpenTF.text = date as String
    self.mondayCloseTF.text = date as String
    self.tuesdayOpenTF.text = date as String
    self.tuesdayCloseTF.text = date as String
    self.wednesdayOpenTF.text = date as String
    self.wednesdayCloseTF.text = date as String
    self.thursdayOpenTF.text = date as String
    self.thursdayCloseTF.text = date as String
    self.fridayOpenTF.text = date as String
    self.fridayCloseTF.text = date as String
    self.saturdayOpenTF.text = date as String
    self.saturdayCloseTF.text = date as String
    self.sundayOpenTF.text = date as String
    self.sundayCloseTF.text = date as String
}

Is it possible to have one UIDatePicker to manage all the times seperately, or do I have to create 14 different ones to fill for each textfield?

Answer 1

So If you only want to populate the currently selected textfield with the date provided, AND all of your textfields are located within your ViewController's MAIN view (or which ever view you specify, you just have to make sure that the view whose subviews you're looping throw contains your UITextFields), you could just check for whichever textfield is the first responder, and then add data to it, like this:

@objc
func timeValueChanged(_ sender: UIDatePicker) {
    let dateFormatter: DateFormatter = DateFormatter()
    dateFormatter.dateFormat = "h:mm a"
    let date: String = dateFormatter.string(from: sender.date)

    if let textfield = view.subviews.first(where: { $0 is UITextField }) as? UITextView, textfield.isFirstResponder {
        textfield.text = date
    }
}

Also, you could potentially clean up your setup code with a similar method, like so:

setupTextFields() {

    for textfield in (view.subviews.map {$0 as? UITextField}.flatMap{$0}) {
        textfield.inputView = datePicker
    }
}