Getting tableview cell value nil in swift - swift

Question

I have tableview with 3 sections. Every section has a row. In my simulator screen only 2 sections are showing . If I will scroll the table view the third cell will be shown. There is a save button, by clicking it I am passing data to another view controller. If I will not scroll the tableview and click the save button then the cell of third section is nil.
My code is:-
let indexPath = IndexPath(row: 0, section: 0)
let indexPath1 = IndexPath(row: 0, section: 1)
let indexPath2 = IndexPath(row: 0, section: 2)
let cell1 = tableView.cellForRow(at: indexPath) as? PatientInformationTableViewCell
let cell2 = tableView.cellForRow(at: indexPath1) as? PatientAdressTableViewCell
let cell3 = tableView.cellForRow(at: indexPath2) as? OtherInfoTableViewCell
guard let name = nameTextField.text,
let id = cell1.patientTextField.text,
let dob = cell1.dobTextField.text,
let street = cell1.streetAdressTextField.text,
let city = cell2.cityTextField.text,
let state = cell2.stateTextField.text,
let zip = cell2.zipTextField.text,
let country = cell2.CountryTextField.text,
let practioner = cell3.practionerTextField.text,
let lcode = cell3.lcodeTextField.text,
let qty = cell3.qtyTextField.text,
let prescription = cell3.PrescriptionTextView.text,
let klLevel = cell3.kLevelTextField.text,
let deviceType = cell3.deviceTypeTextField.text,
let guardian = cell3.guardianTextField.text,
let relationship = cell3.relationshipwithPatient.text
else {
return
}
let patient = PatientInformationModel(name: name, id: id, dob: dob, streetAdress: street, city: city, state: state, zip: zip, country: country, klevel: klLevel, deviceType: deviceType, visitType: "visitType", deliveryLocation: "deliveryLocation", lCode: lcode, qty: qty, descripePrescription: prescription, practioner: practioner, guardian: guardian, relationship: relationship)
let encoder = JSONEncoder()
if let encoded = try? encoder.encode(patient) {
let defaults = UserDefaults.standard
defaults.set(encoded, forKey: "SavedPerson")
}
if let storyBoard = UIStoryboard(name: "Pdf", bundle: nil) as? UIStoryboard{
captureSignature { (sign) in
signatureImage = sign?.image
print("signature image is \(signatureImage)")
}
let PatientListViewController = storyBoard.instantiateViewController(identifier: "GeneratePdfViewController") as? GeneratePdfViewController
PatientListViewController?.signatureImage = signatureImage
self.navigationController?.pushViewController(PatientListViewController!, animated: true)
}
in this above code, if i am clicking on save button without scrolling to bottom , i am getting cell3 value nil.Is there any soution. please help me.