Trouble With UIViewAnimation - ios

Question

I'm getting in trouble on UIView Animation. When I click into one of UITextFields basically everything works fine until I select another UITextField after being selected the other one, the fields move up and down then return to the same place after I select the other UITextField.
What am I doing wrong? What I expected is to move the whole UIStackView containing my fields into up to avoid the keyboard to cover it all. Also, to keep the animation static when I click into the other UITextField, just returning to the default position when the keyboard got dismissed.
class LoginViewController: UIViewController {
var coordinator: MainCoordinator?
override func viewDidLoad() {
super.viewDidLoad()
viewTapped()
setupScreen()
setupViews()
setConstraints()
}
private func setupScreen() {
self.view.backgroundColor = .systemPink
}
private func setConstraints() {
self.textFieldLogin.heightAnchor.constraint(equalToConstant: 50).isActive = true
self.textFieldLogin.widthAnchor.constraint(equalToConstant: 190).isActive = true
//
self.textFieldSenha.heightAnchor.constraint(equalToConstant: 50).isActive = true
self.textFieldSenha.widthAnchor.constraint(equalToConstant: 190).isActive = true
//
self.loginButton.widthAnchor.constraint(equalToConstant: 145).isActive = true
self.loginButton.heightAnchor.constraint(equalToConstant: 50).isActive = true
//
self.stackView.heightAnchor.constraint(equalToConstant: 200).isActive = true
self.stackView.widthAnchor.constraint(equalToConstant: 200).isActive = true
self.stackView.centerYAnchor.constraint(equalTo: self.view.centerYAnchor).isActive = true
self.stackView.centerXAnchor.constraint(equalTo: self.view.centerXAnchor).isActive = true
}
private func setupViews() {
self.view.addSubview(self.stackView)
self.viewTapped()
}
private lazy var textFieldLogin: UITextField = {
let textFieldLogin = UITextField()
textFieldLogin.tag = 1
textFieldLogin.translatesAutoresizingMaskIntoConstraints = false
textFieldLogin.layer.cornerRadius = 3.7
textFieldLogin.textAlignment = .center
textFieldLogin.placeholder = "Usuário"
textFieldLogin.backgroundColor = .white
textFieldLogin.delegate = self
return textFieldLogin
}()
private lazy var textFieldSenha: UITextField = {
let textFieldSenha = UITextField()
textFieldSenha.tag = 2
textFieldSenha.translatesAutoresizingMaskIntoConstraints = false
textFieldSenha.layer.cornerRadius = 3.7
textFieldSenha.textAlignment = .center
textFieldSenha.placeholder = "Senha"
textFieldSenha.backgroundColor = .white
textFieldSenha.delegate = self
return textFieldSenha
}()
private lazy var loginButton: UIButton = {
let loginButton = UIButton()
loginButton.translatesAutoresizingMaskIntoConstraints = false
loginButton.layer.cornerRadius = 3.8
loginButton.titleLabel?.font = UIFont(name: "Arial", size: 19)
loginButton.setTitle("Entrar", for: .normal)
loginButton.setTitleColor(.systemGreen, for: .normal)
loginButton.backgroundColor = .white
return loginButton
}()
private lazy var stackView: UIStackView = {
let stackView = UIStackView(arrangedSubviews: [self.textFieldLogin, self.textFieldSenha, self.loginButton])
stackView.translatesAutoresizingMaskIntoConstraints = false
stackView.backgroundColor = .systemBlue
stackView.axis = .vertical
stackView.distribution = .equalSpacing
return stackView
}()
private func viewTapped() {
let tapGesture = UITapGestureRecognizer(target: self, action: #selector(handleTap))
self.view.addGestureRecognizer(tapGesture)
}
#objc func handleTap(sender: UITapGestureRecognizer) {
UIView.animate(withDuration: 1.1, delay: 0, usingSpringWithDamping: 5.1, initialSpringVelocity: 5.0, options: .curveEaseIn, animations: {
self.stackView.frame.origin.y = self.stackView.frame.origin.y + 130
self.textFieldLogin.resignFirstResponder()
self.textFieldSenha.resignFirstResponder()
}, completion: nil)
}
}
extension LoginViewController: UITextFieldDelegate {
func textFieldDidBeginEditing(_ textField: UITextField) {
UIView.animate(withDuration: 1.1, delay: 0, usingSpringWithDamping: 5.1, initialSpringVelocity: 5.0, options: .curveEaseIn, animations: {
self.stackView.frame.origin.y = self.stackView.frame.origin.y - 130
}, completion: nil)
}
func textFieldDidEndEditing(_ textField: UITextField) {
UIView.animate(withDuration: 1.1, delay: 0, usingSpringWithDamping: 5.1, initialSpringVelocity: 5.0, options: .curveEaseIn, animations: {
self.stackView.frame.origin.y = self.stackView.frame.origin.y + 130
}, completion: nil)
}
func textFieldShouldReturn(_ textField: UITextField) -> Bool {
textField.resignFirstResponder()
return true
}
}

Answer 1

I used the following code into textFieldDidBeginEditing and everything works fine! Thank you all.
UIView.animate(withDuration: 0.5) {
self.view.layoutIfNeeded() //Think I forget this method
self.stackView.frame.origin.y = self.stackView.frame.origin.y - 130
}