Dynamically resize TableViewController Cell - ios

Question

In my project I have a SignUpViewController which looks like this:
All the textFields are custom-cells within a tableViewController.
TableView:
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return 7
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
// 1st cell -> email textfield
if indexPath.row == 0 {
let cell = tableView.dequeueReusableCell(withIdentifier: "SignUpEmailCell", for: indexPath) as! SignUpEmailCell
return cell
// 2nd cell -> anzeigename
}else if indexPath.row == 1 {
let cell = tableView.dequeueReusableCell(withIdentifier: "SignUpAnzeigeName", for: indexPath) as! SignUpAnzeigeName
return cell
// 3rd cell -> Wishlist-Handle
}else if indexPath.row == 2 {
let cell = tableView.dequeueReusableCell(withIdentifier: "SignUpHandleCell", for: indexPath) as! SignUpHandleCell
return cell
// 4th cell -> passwort textfield
}else if indexPath.row == 3 {
let cell = tableView.dequeueReusableCell(withIdentifier: "SignUpPasswordCell", for: indexPath) as! SignUpPasswordCell
return cell
// 5th cell -> repeat password textfield
}else if indexPath.row == 4 {
let cell = tableView.dequeueReusableCell(withIdentifier: "SignUpPasswordRepeatCell", for: indexPath) as! SignUpPasswordRepeatCell
return cell
// 6th cell -> document label
}else if indexPath.row == 5 {
let cell = tableView.dequeueReusableCell(withIdentifier: "SignUpDocumentCell", for: indexPath) as! SignUpDocumentCell
return cell
}
// last cell -> signUpButton
let cell = tableView.dequeueReusableCell(withIdentifier: "SignUpButtonCell", for: indexPath) as! SignUpButtonCell
return cell
}
Password-Cell: (basic structure is the same for every cell)
class SignUpPasswordCell: UITableViewCell, UITextFieldDelegate {
public static let reuseID = "SignUpPasswordCell"
lazy var eyeButton: UIButton = {
let v = UIButton()
v.addTarget(self, action: #selector(eyeButtonTapped), for: .touchUpInside)
v.setImage(UIImage(named: "eyeOpen"), for: .normal)
v.translatesAutoresizingMaskIntoConstraints = false
return v
}()
lazy var passwordTextField: CustomTextField = {
let v = CustomTextField()
v.borderActiveColor = .white
v.borderInactiveColor = .white
v.textColor = .white
v.font = UIFont(name: "AvenirNext-Regular", size: 17)
v.placeholder = "Passwort"
v.placeholderColor = .white
v.placeholderFontScale = 0.8
v.minimumFontSize = 13
v.borderStyle = .line
v.addTarget(self, action: #selector(SignUpPasswordCell.passwordTextFieldDidChange(_:)),for: .editingChanged)
v.translatesAutoresizingMaskIntoConstraints = false
return v
}()
required init?(coder: NSCoder) {fatalError("init(coder:) has not been implemented")}
override init(style: UITableViewCell.CellStyle, reuseIdentifier: String?) {
super.init(style: style, reuseIdentifier: reuseIdentifier)
self.backgroundColor = .clear
passwordTextField.delegate = self
eyeButton.isHidden = true
passwordTextField.textContentType = .newPassword
passwordTextField.isSecureTextEntry.toggle()
setupViews()
}
func setupViews(){
contentView.addSubview(passwordTextField)
contentView.addSubview(eyeButton)
passwordTextField.centerYAnchor.constraint(equalTo: centerYAnchor).isActive = true
passwordTextField.leadingAnchor.constraint(equalTo: leadingAnchor).isActive = true
passwordTextField.trailingAnchor.constraint(equalTo: trailingAnchor).isActive = true
passwordTextField.heightAnchor.constraint(equalToConstant: 60).isActive = true
eyeButton.trailingAnchor.constraint(equalTo: trailingAnchor, constant: -5).isActive = true
eyeButton.centerYAnchor.constraint(equalTo: centerYAnchor, constant: 10).isActive = true
}
var check = true
#objc func eyeButtonTapped(_ sender: Any) {
check = !check
if check == true {
eyeButton.setImage(UIImage(named: "eyeOpen"), for: .normal)
} else {
eyeButton.setImage(UIImage(named: "eyeClosed"), for: .normal)
}
passwordTextField.isSecureTextEntry.toggle()
if let existingText = passwordTextField.text, passwordTextField.isSecureTextEntry {
/* When toggling to secure text, all text will be purged if the user
continues typing unless we intervene. This is prevented by first
deleting the existing text and then recovering the original text. */
passwordTextField.deleteBackward()
if let textRange = passwordTextField.textRange(from: passwordTextField.beginningOfDocument, to: passwordTextField.endOfDocument) {
passwordTextField.replace(textRange, withText: existingText)
}
}
/* Reset the selected text range since the cursor can end up in the wrong
position after a toggle because the text might vary in width */
if let existingSelectedTextRange = passwordTextField.selectedTextRange {
passwordTextField.selectedTextRange = nil
passwordTextField.selectedTextRange = existingSelectedTextRange
}
}
#objc func passwordTextFieldDidChange(_ textField: UITextField) {
if textField.text == "" {
self.eyeButton.isHidden = true
}else {
self.eyeButton.isHidden = false
}
}
}
Problem:
I would like to be able to show some extra information on some textFields when selected.
For example: When passwordTextField is editing I would like to show the password requirements right below the textfield. But the extra information should only be displayed while editing or after editing. When the ViewController is being displayed at first it should still look like the picture above.
I hope my problem is clear and I am grateful for every help.