let pick:PresentedViewController = PresentedViewController()
pick.style = DefaultStyle()
pick.block = { [weak self] (date) in
    self?.txtShowDate.text = date
}
self.present(pick, animated: true, completion: nil)

var style = DefaultStyle()
// You can set one or mutilple colors in picker text color
style.pickerColor = StyleColor.colors([style.textColor, .red, .blue]) // or StyleColor.color(UIColor.red)
// Picker mode
style.pickerMode = .date
// If you want a title in datePicker, you can use this.
style.titleString = "This is Date Picker"
// Define some date format
style.returnDateFormat = .d_m_yyyy
// The minimum date
style.minimumDate = Date()
// The maximum date
style.maximumDate = Date().addingTimeInterval(3600*24*7*52)
// Set title font
style.titleFont = UIFont.systemFont(ofSize: 25, weight: .bold)

struct CustomStyle:PickerStyle {
    var textColor:UIColor
    var pickerColor: StyleColor?
    var timeZone: TimeZone?
    var minimumDate: Date?
    var maximumDate: Date?
    var pickerMode:UIDatePicker.Mode?
    var titleFont:UIFont?
    var returnDateFormat:DateFormat?
    var titleString: String?
}