Tableview文本输入字段在提交期间为空(如果不在视图中

struct FormData {
    var text: String
}

var formDataArray = [FormData]()

func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
    let cell = tableView.dequeueReusableCell(withIdentifier: "Cell", for: indexPath) as! CustomTableViewCell
    let formData = formDataArray[indexPath.row]
    cell.textField.text = formData.text
    return cell
}

func textFieldDidChange(_ textField: UITextField, in cell: CustomTableViewCell) {
    let indexPath = tableView.indexPath(for: cell)!
    formDataArray[indexPath.row].text = textField.text ?? ""
}

extension ViewController: UITextFieldDelegate {
    func textFieldDidEndEditing(_ textField: UITextField) {
        if let indexPath = tableView.indexPath(for: textField.superview?.superview as! UITableViewCell) {
            formDataArray[indexPath.row].text = textField.text ?? ""
        }
    }
}

func submitForm() {
    for indexPath in tableView.indexPathsForVisibleRows ?? [] {
        if let cell = tableView.cellForRow(at: indexPath) as? CustomTableViewCell {
            formDataArray[indexPath.row].text = cell.textField.text ?? ""
        }
    }
    // 提交数据
}