Minimum and maximum date in UIDatePicker

Question

I want to get the minimum and maximum date from a date picker, but minimum date should be \"- 18\" of the current date and the maximum date should be \"- 100\" of current da

Answer 1

Swift 4.1

I have created my extension for all type of limit based on Calendar.Component

extension UIDatePicker {

    func setLimit(forCalendarComponent component:Calendar.Component, minimumUnit min: Int, maximumUnit max: Int) {

        let currentDate: Date = Date()
        var calendar: Calendar = Calendar(identifier: Calendar.Identifier.gregorian)

        guard let timeZone = TimeZone(identifier: "UTC") else { return }
        calendar.timeZone = timeZone

        var components: DateComponents = DateComponents()
        components.calendar = calendar

        components.setValue(-min, for: component)
        if let maxDate: Date = calendar.date(byAdding: components, to: currentDate) {
            self.maximumDate = maxDate
        }

        components.setValue(-max, for: component)
        if let minDate: Date = calendar.date(byAdding: components, to: currentDate) {
            self.minimumDate = minDate
        }
    }

}

We can use this as following:

self.datePicker.setLimit(forCalendarComponent: .year, minimumUnit: 13, maximumUnit: 100)