import TVOSPicker

...

// ViewController viewDidLoad
let picker = TVOSPickerView(
    style: .default, // pass custom style here if needed
    delegate: self
)
view.addSubview(picker)
... // setup frames/constraints

// to reload all components
picker.reloadData()
// to reload specific components
picker.reloadComponents([0, 2, 4])
// OR
picker.reloadComponent(1)

// ViewController TVOSPickerViewDelegate conformance
extension ViewController: TVOSPickerViewDelegate {
    func numberOfComponents(in pickerView: TVOSPickerView) -> Int {
        // number of components (columns)
    }

    func pickerView(_ pickerView: TVOSPickerView, numberOfRowsInComponent component: Int) -> Int {
        // number of rows in each component
    }

    func pickerView(_ pickerView: TVOSPickerView, titleForRow row: Int, inComponent component: Int) -> String? {
        // string to display in each row
    }

    func pickerView(_ pickerView: TVOSPickerView, didSelectRow row: Int, inComponent component: Int) {
        // update state with the newly selected row
    }

    func indexOfSelectedRow(inComponent component: Int, ofPickerView pickerView: TVOSPickerView) -> Int? {
        // provide an index of selected row - used as initially focused index as well as after each reloadData
    }
}

import TVOSPicker

...

// ViewController viewDidLoad
let picker = TVOSDatePickerView(
    delegate: GregorianCalendarDatePickerDelegate( // delegate supporting Gregorian calendar is provided with the package
        order: .dayMonthYear, // customize order of components
        locale: Locale.autoupdatingCurrent,
        minYear: 1950,
        initialDate: Date()
    )
)
picker.style = ... // by default TVOSDatePickerView uses .datePicker style, this can be overriden here
view.addSubview(picker)
... // setup frames/constraints

// to retrieve selected date
print(picker.date)