ios - 使用日期选择器后如何获取年龄？

Question

我需要在使用日期选择器后获取年龄。我该怎么做。我目前可以让日期选择器工作。

@IBAction func datepickerobj(sender: UITextField) {

    let datePickerView:UIDatePicker = UIDatePicker()

    datePickerView.datePickerMode = UIDatePickerMode.Date

    sender.inputView = datePickerView

    datePickerView.addTarget(self, action: Selector("datePickerValueChanged:"), forControlEvents: UIControlEvents.ValueChanged)
}


func datePickerValueChanged(sender:UIDatePicker) {

    let dateFormatter = NSDateFormatter()

    dateFormatter.dateStyle = NSDateFormatterStyle.MediumStyle

    dateFormatter.timeStyle = NSDateFormatterStyle.NoStyle

    dateofbirth.text = dateFormatter.stringFromDate(sender.date)

    let myDOB = NSCalendar.currentCalendar().dateWithEra(1, year: 1970, month: 09, day: 10, hour: 0, minute: 0, second: 0, nanosecond: 0)!
    let myAge = myDOB.age
}

Answer 1

swift 4.1/Xcode 9.4.1

func age(dateOfBirth: Date) -> Double {
    var ageComponents: DateComponents = Calendar.current.dateComponents([.year], from: dateOfBirth, to: Date())
    return Double(ageComponents.year!)
}