Search code examples
swifttimensdateformatterformatter

string to date in my timeZone make wrong date

I'm trying to convert String to date in my country time zone but the result is not as formatted I did

   let dbl = TimeInterval(longDate)

    let date = Date(timeIntervalSince1970: dbl / 1000)

    let formatter = DateFormatter()
    print(longDate)

    formatter.calendar = Calendar(identifier: .persian)
    formatter.locale = Locale(identifier: "fa_IR")
    formatter.timeZone = TimeZone(identifier: "IRST")

    formatter.dateFormat = "yyyy-MM-dd HH:mm:ss"
  let a = formatter.string(from: date)
 resultDate = dateFormatter.date(from: a)
 print(reslutDate,a) //2018-08-02 11:56:28 +0000 incorrect time 1397-05-11 15:56:28 correct time

in print line date is correct but the time is incorrect. I need this time to my Timepicker

update :

I have listener for time when I change the time set the value on textField

like below : 

   self.timePickerFrom.addTarget(self, action: #selector(self.dateChangedFrom(_:)), for: .valueChanged).  // the listener

and this is what I do for changing value :

let date = self.timePickerFrom.date
    print(date)
    let components = Calendar.current.dateComponents([.hour, .minute], from: date)
    let hour = components.hour!
    let minute = components.minute!

        self.timeOfloadingLable.text = "\(hour):\(minute)"

but the problem is when I change minute goes 30Min forward

Solution

  • Your are doing it in wrong way, You should set format on date picker not the date of date picker.

    Look at this code:

    @IBOutlet weak var epoch: UITextField!
@IBOutlet weak var dateTimePicker: UIDatePicker!

@IBAction func presentDate(_ sender: UIButton) {
    guard let text = epoch.text else {return}
    guard let epoch = Double(text) else {return}
    guard let date = convertDate(epoch: epoch) else {return}

    dateTimePicker.date = date
    dateTimePicker.timeZone = TimeZone(identifier: "IRST")
    dateTimePicker.locale = Locale(identifier: "fa_IR")
    dateTimePicker.calendar = Calendar(identifier: Calendar.Identifier.persian)
}

private func convertDate(epoch: Double) -> Date? {
    let date = Date(timeIntervalSince1970: epoch)
    return date
}

    sample

    Is it what you mean?

    I just uploaded a sample project, you can check it here: sample project