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我有一个在我的RegisterViewController中以编程方式创建的段控件。 registerbutton工作并将所有内容保存在Firebase数据库中，但当我切换到登录按钮时，不同文本字段的高度会发生变化，但第一个字段不会消失......从第一个文本字段中仍然可以看到一小段文本（正如你在图片上看到的那样）。此外，当我测试登录功能时，它不会以现有用户身份登录，但会在数据库中创建一个新用户，因此我认为它不会更改代码...Swift 3段视图错误
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import UIKit
import Firebase
class RegisterViewController: UIViewController {
let inputsContainerView: UIView = {
let View = UIView()
View.backgroundColor = UIColor.white
View.translatesAutoresizingMaskIntoConstraints = false
View.layer.cornerRadius = 5
View.layer.masksToBounds = true
return View
}()
lazy var loginRegisterButton: UIButton = {
let button = UIButton(type: .system)
button.backgroundColor = UIColor(red: 80/255, green: 101/255, blue: 161/255, alpha: 1)
button.setTitle("Register", for: .normal)
button.setTitleColor(UIColor.white, for: .normal)
button.titleLabel?.font = UIFont.boldSystemFont(ofSize: 16)
button.translatesAutoresizingMaskIntoConstraints = false
button.addTarget(self, action: #selector(handleRegister), for: .touchUpInside)
return button
}()
func handleLoginRegister() {
if loginRegisterSegmentedControl.selectedSegmentIndex == 0 {
handleLogin()
} else {
handleRegister()
}
}
func handleLogin() {
guard let email = emailTextField.text, let password = passwordTextField.text
else {
print("Form is not valid")
return
}
FIRAuth.auth()?.signIn(withEmail: email, password: password, completion: { (user, error) in
if error != nil {
print(error ?? "")
return
}
self.dismiss(animated: true, completion: nil)
})
}
func handleRegister() {
guard let email = emailTextField.text, let password = passwordTextField.text, let name = nameTextField.text
else {
print("Form is not valid")
return
}
FIRAuth.auth()?.createUser(withEmail: email, password: password, completion: { (user: FIRUser?, error) in
if error != nil {
print(error ?? "")
return
}
guard let uid = user?.uid else {
return
}
//Succesfully authenticated user
let ref = FIRDatabase.database().reference(fromURL: "https://assemble-148108.firebaseio.com/")
let usersReference = ref.child("users").child(uid)
let values = ["name": name, "email": email]
usersReference.updateChildValues(values, withCompletionBlock: { (err, ref) in
if err != nil {
print(err ?? "")
return
}
print("Saved user successfully into Firebase db")
})
})
}
let nameTextField: UITextField = {
let tf = UITextField()
tf.placeholder = "Name"
tf.translatesAutoresizingMaskIntoConstraints = false
return tf
}()
let nameSeparatorView: UIView = {
let view = UIView()
view.backgroundColor = UIColor(colorLiteralRed: 220/225, green: 220/225, blue: 220/225, alpha: 1)
view.translatesAutoresizingMaskIntoConstraints = false
return view
}()
let emailTextField: UITextField = {
let tf = UITextField()
tf.placeholder = "Email"
tf.translatesAutoresizingMaskIntoConstraints = false
return tf
}()
let emailSeparatorView: UIView = {
let view = UIView()
view.backgroundColor = UIColor(colorLiteralRed: 220/225, green: 220/225, blue: 220/225, alpha: 1)
view.translatesAutoresizingMaskIntoConstraints = false
return view
}()
let passwordTextField: UITextField = {
let tf = UITextField()
tf.placeholder = "Password"
tf.translatesAutoresizingMaskIntoConstraints = false
tf.isSecureTextEntry = true
return tf
}()
let profileImageView: UIImageView = {
let imageView = UIImageView()
imageView.image = UIImage(named: "avatar")
imageView.translatesAutoresizingMaskIntoConstraints = false
imageView.contentMode = .scaleAspectFill
return imageView
}()
lazy var loginRegisterSegmentedControl: UISegmentedControl = {
let sc = UISegmentedControl(items: ["Login", "Register"])
sc.translatesAutoresizingMaskIntoConstraints = false
sc.tintColor = UIColor.white
sc.selectedSegmentIndex = 1
sc.addTarget(self, action: #selector(handleLoginRegisterChange), for: .valueChanged)
return sc
}()
func handleLoginRegisterChange() {
let title = loginRegisterSegmentedControl.titleForSegment(at: loginRegisterSegmentedControl.selectedSegmentIndex)
loginRegisterButton.setTitle(title, for: .normal)
// change height of inputContainerView, but how???
inputsContainerViewHeightAnchor?.constant = loginRegisterSegmentedControl.selectedSegmentIndex == 0 ? 100 : 150
// change height of nameTextField
nameTextFieldHeightAnchor?.isActive = false
nameTextFieldHeightAnchor = nameTextField.heightAnchor.constraint(equalTo: inputsContainerView.heightAnchor, multiplier: loginRegisterSegmentedControl.selectedSegmentIndex == 0 ? 0 : 1/3)
nameTextFieldHeightAnchor?.isActive = true
emailTextFieldHeightAnchor?.isActive = false
emailTextFieldHeightAnchor = emailTextField.heightAnchor.constraint(equalTo: inputsContainerView.heightAnchor, multiplier: loginRegisterSegmentedControl.selectedSegmentIndex == 0 ? 1/2 : 1/3)
emailTextFieldHeightAnchor?.isActive = true
passwordTextFieldHeightAnchor?.isActive = false
passwordTextFieldHeightAnchor = passwordTextField.heightAnchor.constraint(equalTo: inputsContainerView.heightAnchor, multiplier: loginRegisterSegmentedControl.selectedSegmentIndex == 0 ? 1/2 : 1/3)
passwordTextFieldHeightAnchor?.isActive = true
}
override func viewDidLoad() {
super.viewDidLoad()
view.backgroundColor = UIColor(colorLiteralRed: 61/225, green: 91/255, blue: 151/255, alpha: 1)
view.addSubview(inputsContainerView)
view.addSubview(loginRegisterButton)
view.addSubview(profileImageView)
view.addSubview(loginRegisterSegmentedControl)
setupInputsContainerView()
setuploginRegisterButton()
setupProfileImageView()
setupRegisterSegmentedControl()
}
//hier moet de kleur van de tijd helemaal bovenaan aangepast worden van zwart naar wit
//override func preferredStatusBarStyle() -> UIStatusBarStyle {
// return .lightContent
//}
func setupRegisterSegmentedControl() {
// need x, y, width, height constraints
loginRegisterSegmentedControl.centerXAnchor.constraint(equalTo: view.centerXAnchor).isActive = true
loginRegisterSegmentedControl.bottomAnchor.constraint(equalTo:inputsContainerView.topAnchor, constant: -12).isActive = true
loginRegisterSegmentedControl.widthAnchor.constraint(equalTo: inputsContainerView.widthAnchor, multiplier: 1).isActive = true
loginRegisterSegmentedControl.heightAnchor.constraint(equalToConstant: 36).isActive = true
}
func setupProfileImageView() {
// need x, y, width, height constraints
profileImageView.centerXAnchor.constraint(equalTo: view.centerXAnchor).isActive = true
profileImageView.bottomAnchor.constraint(equalTo: loginRegisterSegmentedControl.topAnchor, constant: -12).isActive = true
profileImageView.widthAnchor.constraint(equalToConstant: 100).isActive = true
profileImageView.heightAnchor.constraint(equalToConstant: 100).isActive = true
}
var inputsContainerViewHeightAnchor: NSLayoutConstraint?
var nameTextFieldHeightAnchor: NSLayoutConstraint?
var emailTextFieldHeightAnchor: NSLayoutConstraint?
var passwordTextFieldHeightAnchor: NSLayoutConstraint?
func setupInputsContainerView() {
// need x, y, width, height constraints
inputsContainerView.centerXAnchor.constraint(equalTo: view.centerXAnchor).isActive = true
inputsContainerView.centerYAnchor.constraint(equalTo: view.centerYAnchor).isActive = true
inputsContainerView.widthAnchor.constraint(equalTo: view.widthAnchor, constant: -24).isActive = true
inputsContainerViewHeightAnchor = inputsContainerView.heightAnchor.constraint(equalToConstant: 150)
inputsContainerViewHeightAnchor?.isActive = true
inputsContainerView.addSubview(nameTextField)
inputsContainerView.addSubview(nameSeparatorView)
inputsContainerView.addSubview(emailTextField)
inputsContainerView.addSubview(emailSeparatorView)
inputsContainerView.addSubview(passwordTextField)
// need x, y, width, height constraints
nameTextField.leftAnchor.constraint(equalTo: inputsContainerView.leftAnchor, constant: 12).isActive = true
nameTextField.topAnchor.constraint(equalTo: inputsContainerView.topAnchor).isActive = true
nameTextField.widthAnchor.constraint(equalTo: inputsContainerView.widthAnchor).isActive = true
nameTextFieldHeightAnchor = nameTextField.heightAnchor.constraint(equalTo: inputsContainerView.heightAnchor, multiplier: 1/3)
nameTextFieldHeightAnchor?.isActive = true
// need x, y, width, height constraints
nameSeparatorView.leftAnchor.constraint(equalTo: inputsContainerView.leftAnchor).isActive = true
nameSeparatorView.topAnchor.constraint(equalTo: nameTextField.bottomAnchor).isActive = true
nameSeparatorView.widthAnchor.constraint(equalTo: inputsContainerView.widthAnchor).isActive = true
nameSeparatorView.heightAnchor.constraint(equalToConstant: 1).isActive = true
// need x, y, width, height constraints
emailTextField.leftAnchor.constraint(equalTo: inputsContainerView.leftAnchor, constant: 12).isActive = true
emailTextField.topAnchor.constraint(equalTo: nameTextField.bottomAnchor).isActive = true
emailTextField.widthAnchor.constraint(equalTo: inputsContainerView.widthAnchor).isActive = true
emailTextFieldHeightAnchor = emailTextField.heightAnchor.constraint(equalTo: inputsContainerView.heightAnchor, multiplier: 1/3)
emailTextFieldHeightAnchor?.isActive = true
// need x, y, width, height constraints
emailSeparatorView.leftAnchor.constraint(equalTo: inputsContainerView.leftAnchor).isActive = true
emailSeparatorView.topAnchor.constraint(equalTo: emailTextField.bottomAnchor).isActive = true
emailSeparatorView.widthAnchor.constraint(equalTo: inputsContainerView.widthAnchor).isActive = true
emailSeparatorView.heightAnchor.constraint(equalToConstant: 1).isActive = true
// need x, y, width, height constraints
passwordTextField.leftAnchor.constraint(equalTo: inputsContainerView.leftAnchor, constant: 12).isActive = true
passwordTextField.topAnchor.constraint(equalTo: emailTextField.bottomAnchor).isActive = true
passwordTextField.widthAnchor.constraint(equalTo: inputsContainerView.widthAnchor).isActive = true
passwordTextFieldHeightAnchor = passwordTextField.heightAnchor.constraint(equalTo: inputsContainerView.heightAnchor, multiplier: 1/3)
passwordTextFieldHeightAnchor?.isActive = true
}
func setuploginRegisterButton() {
// need x, y, width, height constraints
loginRegisterButton.centerXAnchor.constraint(equalTo: view.centerXAnchor).isActive = true
loginRegisterButton.topAnchor.constraint(equalTo: inputsContainerView.bottomAnchor, constant: 12).isActive = true
loginRegisterButton.widthAnchor.constraint(equalTo: inputsContainerView.widthAnchor).isActive = true
loginRegisterButton.heightAnchor.constraint(equalToConstant: 30).isActive = true
}
}
谢谢你的布局问题，现在就解决了。你知道为什么func handleLoginRegister（）不起作用吗？我认为如果这个工作，登录问题也会得到解决。 – Maarten
'handleLoginRegister'实际上并没有在任何地方设置。你需要它吗？ –