Возникли проблемы при воссоздании JTAppleCalender из патча кода

Question

У меня возникли проблемы при попытке воссоздать календарь из учебника patchthecode. Вот ссылка: https://patchthecode.github.io/MainTutorial2/. Вот несколько ошибок, которые я получаю:

1.Не можете присвоить значение типа 'ViewController' типу 'UICollectionViewDataSource?'

2.Не можете присвоить значение типа 'ViewController' типу 'UICollectionViewDelegate?'

3.Значение типа 'JTAppleCalendarView?' У пользователя нет члена 'registerCellViewXib'

4. Значение типа 'JTAppleCalendarView?' не имеет члена 'cellInset'

5.Использование необъявленного типа 'DateCell'

6. Неправильная переопределение 'календаря (_: cellForItemAt: cellState: indexPath:)'

7.Использование неразрешенного идентификатора 'myCustomCell'

import UIKit
import JTAppleCalendar
class ViewController: UIViewController {
    let white = UIColor.white
    let darkPurple = UIColor.purple
    let dimPurple = #colorLiteral(red: 0.5568627715, green: 0.3529411852, blue: 0.9686274529, alpha: 1)
@IBOutlet weak var calendarView: JTAppleCalendarView!
    override func viewDidLoad() {
        super.viewDidLoad()
        // Do any additional setup after loading the view, typically from a nib.
        super.viewDidLoad()
        calendarView.dataSource = self
        calendarView.delegate = self
        calendarView.registerCellViewXib(file: "CellView") // Registering your cell is manditory
        calendarView.cellInset = CGPoint(x: 0, y: 0)       // default is (3,3)
    }

    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
        // Dispose of any resources that can be recreated.
    }
}

    func calendar(_ calendar: JTAppleCalendarView, cellForItemAt date: Date, cellState: CellState, indexPath: IndexPath) -> JTAppleCell {
        let cell: DateCell = JTAppleCell() as! DateCell
        return cell
    }

    func calendar(_ calendar: JTAppleCalendarView, cellForItemAt date: Date, cellState: CellState, indexPath: IndexPath) -> JTAppleCell {

//        let myCustomCell = cell as! CellView

        // Setup Cell text
        myCustomCell.dayLabel.text = cellState.text

        // Setup text color
        if cellState.dateBelongsTo == .thisMonth {
            myCustomCell.dayLabel.textColor = UIColor.black
        } else {
            myCustomCell.dayLabel.textColor = UIColor.gray
        }
    }


func calendar(_ calendar: JTAppleCalendarView, cellForItemAt date: Date, cellState: CellState, indexPath: IndexPath) -> JTAppleCell {
    let myCustomCell = calendar.dequeueReusableCell(withReuseIdentifier: "CellView", for: indexPath) as! CellView
//    self.calendar(self.calendar, willDisplay: myCustomCell, forItemAt: date, cellState: cellState, indexPath: indexPath)
    return myCustomCell
    }
    func configureCalendar(_ calendar: JTAppleCalendarView) -> ConfigurationParameters {
        let formatter = DateFormatter()
        formatter.dateFormat = "yyyy MM dd"

        let startDate = formatter.date(from: "2016 02 01")! // You can use date generated from a formatter
        let endDate = Date()                                // You can also use dates created from this function
        let parameters = ConfigurationParameters(startDate: startDate,
                                                 endDate: endDate,
                                                 numberOfRows: 6, // Only 1, 2, 3, & 6 are allowed
            calendar: Calendar.current,
            generateInDates: .forAllMonths,
            generateOutDates: .tillEndOfGrid,
            firstDayOfWeek: .sunday)
        return parameters
    }
func calendar(_ calendar: JTAppleCalendarView, didSelectDate date: Date, cell: JTAppleCell?, cellState: CellState) {
    let myCustomCell = cell as! CellView

    // Let's make the view have rounded corners. Set corner radius to 25
    myCustomCell.selectedView.layer.cornerRadius =  25

    if cellState.isSelected {
        myCustomCell.selectedView.isHidden = false
    }
}
func calendar(_ calendar: JTAppleCalendarView, didDeselectDate date: Date, cell: JTAppleCell?, cellState: CellState) {
    let myCustomCell = cell as! CellView
    myCustomCell.selectedView.isHidden = true
}
// Function to handle the text color of the calendar
func handleCellTextColor(view: JTAppleCell, cellState: CellState) {

    guard let myCustomCell = view as? CellView  else {
        return
    }

    if cellState.isSelected {
        myCustomCell.dayLabel.textColor = UIColor.purple
    } else {
        if cellState.dateBelongsTo == .thisMonth {
            myCustomCell.dayLabel.textColor = UIColor.white
        } else {
            myCustomCell.dayLabel.textColor = UIColor.purple
        }
    }
}

// Function to handle the calendar selection
func handleCellSelection(view: JTAppleCell?, cellState: CellState) {
    guard let myCustomCell = view as? CellView  else {
        return
    }
    if cellState.isSelected {
        myCustomCell.selectedView.layer.cornerRadius =  25
        myCustomCell.selectedView.isHidden = false
    } else {
        myCustomCell.selectedView.isHidden = true
    }
}
extension UIColor {
    convenience init(colorWithHexValue value: Int, alpha:CGFloat = 1.0){
        self.init(
            red: CGFloat((value & 0xFF0000) >> 16) / 255.0,
            green: CGFloat((value & 0x00FF00) >> 8) / 255.0,
            blue: CGFloat(value & 0x0000FF) / 255.0,
            alpha: alpha
        )
    }
}