How to set Minimum time to appear as default in UIDatepicker everytime

Question

In Datepicker i have set Min and Max time where uidatepicker can scroll for example i have set 3:00PM as minimum time and 8:00PM as maximum time , when i run the app i want

Answer 1

Updated for Swift 3 :

        let startHour: Int = 6
        let endHour: Int = 23
        let date1: NSDate = NSDate()
        let gregorian: NSCalendar = NSCalendar(calendarIdentifier: NSCalendar.Identifier.gregorian)!

        let components: NSDateComponents = gregorian.components(([.day, .month, .year]), from: date1 as Date) as NSDateComponents
        components.hour = startHour
        components.minute = 0
        components.second = 0
        let startDate: NSDate = gregorian.date(from: components as DateComponents)! as NSDate

        components.hour = endHour
        components.minute = 0
        components.second = 0
        let endDate: NSDate = gregorian.date(from: components as DateComponents)! as NSDate

        timePicker.datePickerMode = .time
        timePicker.minimumDate = startDate as Date
        timePicker.maximumDate = endDate as Date
        timePicker.setDate(startDate as Date, animated: true)
        timePicker.reloadInputViews()
        timePicker.frame = CGRect(x: 0.0, y: (self.view.frame.height/2 + 60), width: self.view.frame.width, height: 150.0)
        timePicker.backgroundColor = UIColor.white
//        timePicker.reloadInputViews()
        self.view.addSubview(timePicker)
        timePicker.addTarget(self, action: #selector(RoundTripViewController.startTimeDiveChanged), for: UIControlEvents.valueChanged)