How to toggle open close uitableViewCell

Question

I have 2 cell I want to toggle open close, unfortunately it not work. when I try to open the app for the first time a content inside cell is showing, since in my tableView cell i make it invisible by default. and when I try to tap the other cell the content inside the cell is still there not disappearing. what I want to achieve is when I try open the app all the cell in close state, and when it tapped it will expand. how can I do that? this is my code

// This is my subjectCell
    var selectedIndex: IndexPath = IndexPath(row: 0, section: 0)
    var isOpen: Bool?

    extension SubjectCell: UITableViewDelegate, UITableViewDataSource {
    func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
        return 3
    }

    func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
        if indexPath.row == 0 {
            let cell = tableView.dequeueReusableCell(withIdentifier: DailyTableViewCell.cellID, for: indexPath) as! DailyTableViewCell
            cell.animate()
            return cell
        } else if indexPath.row == 1 {
            let cell = tableView.dequeueReusableCell(withIdentifier: SubjectTableViewCell.cellID, for: indexPath) as! SubjectTableViewCell
            cell.animate()
            return cell
        }
        return UITableViewCell()
    }

    func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
        selectedIndex = indexPath

        tableView.beginUpdates()
        tableView.endUpdates()
    }

    func tableView(_ tableView: UITableView, heightForRowAt indexPath: IndexPath) -> CGFloat {
        if selectedIndex.row == 0 {
            let cell = tableView.cellForRow(at: selectedIndex) as? DailyTableViewCell
            if isOpen == false {
                isOpen = true
                UIView.animate(withDuration: 0.7, delay: 0.3, usingSpringWithDamping: 0.7, initialSpringVelocity: 1, options: .curveEaseInOut, animations: {
                    cell?.calendarView.alpha = 1
                    cell?.arrowImageView.image = #imageLiteral(resourceName: "up-chevron")
                })

                return 330
            } else {
                isOpen = false
                UIView.animate(withDuration: 0.7, delay: 0, usingSpringWithDamping: 0.7, initialSpringVelocity: 1, options: .curveEaseInOut, animations: {
                    cell?.calendarView.alpha = 0
                    cell?.arrowImageView.image = #imageLiteral(resourceName: "down-chevron")
                })

                return 100
            }

        } else if selectedIndex.row == 1 {
            let cell = tableView.cellForRow(at: selectedIndex) as? SubjectTableViewCell
            if isOpen == false {
                isOpen = true
                UIView.animate(withDuration: 0.7, delay: 0.3, usingSpringWithDamping: 0.7, initialSpringVelocity: 1, options: .curveEaseInOut, animations: {
                    cell?.tableView.alpha = 1
                    cell?.arrowImageView.image = #imageLiteral(resourceName: "up-chevron")
                })

                return 330
            } else {
                isOpen = false
                UIView.animate(withDuration: 0.7, delay: 0, usingSpringWithDamping: 0.7, initialSpringVelocity: 1, options: .curveEaseInOut, animations: {
                    cell?.tableView.alpha = 0
                    cell?.arrowImageView.image = #imageLiteral(resourceName: "down-chevron")
                })

                return 100
            }
        }

        return 100
    }
}

// this is in my each tableViewCell
func animate() {
        UIView.animate(withDuration: 0.7, delay: 0.3, usingSpringWithDamping: 0.7, initialSpringVelocity: 1, options: .curveEaseInOut, animations: {
            self.contentView.layoutIfNeeded()
        })
    }