从选择 UITextField 按下到另一个 UITextField 的转换是否会导致 UIView 在 Swift 中重新加载？
Can the transition from the selection UITextField press to another UITextField cause the UIView to reload in Swift?
我的应用加载后立即出现以下视图：
只要我点击全名文本字段，键盘就会显示并稍微移动元素以允许注册按钮保持显示。
当我移动到第二个文本字段时出现问题。它会导致视图完全重新加载并将视图中的所有元素放置到它们的原始位置，这使得键盘隐藏最低的元素。如下图所示
我已经搜索并检查了问题是否来自于键盘加载 keyboardwillshow() 和 keyboardwillhide 当这个问题发生时根本没有被调用，正如我所验证的那样。
从选择 UITextField 按下到另一个 UITextField 的转换是否会导致 UIView 重新加载 Xcode？请注意，UIText 字段位于
import UIKit
import SendBirdSDK
class LoginController: UIViewController {
var keyboardShowing = false
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(r: 88, g: 101, b: 161)
button.setTitle("Register", for: .normal)
button.translatesAutoresizingMaskIntoConstraints = false
button.setTitleColor(UIColor.white, for: .normal)
button.titleLabel?.font = UIFont.boldSystemFont(ofSize: 16)
button.addTarget(self, action: #selector(handleLoginRegister), for: .touchUpInside)
return button
}()
func handleLoginRegister() {
if loginRegisterSegmentedControl.selectedSegmentIndex == 0 {
handleLogin()
} else {
handleRegister()
}
}
func handleLogin(){
guard let userid = fullNameTextField.text, (passwordTextField.text != nil) else {
print ("Form is not valid")
return
}
SBDMain.connect(withUserId: userid, completionHandler: { (user, error) in
if error != nil {
print (error)
return
}
//successfully loggedin user
self.dismiss(animated: true, completion: nil)
})
}
let nameTextField: UITextField = {
let tf = UITextField()
tf.placeholder = "Full Name"
tf.translatesAutoresizingMaskIntoConstraints = false
return tf
}()
let nameSeperatorView: UIView = {
let view = UIView()
view.backgroundColor = UIColor(r: 220, g: 220, b: 220)
view.translatesAutoresizingMaskIntoConstraints = false
return view
}()
let fullNameTextField: UITextField = {
let tf = UITextField()
tf.placeholder = "Username"
tf.translatesAutoresizingMaskIntoConstraints = false
return tf
}()
let fullNameSeperatorView: UIView = {
let view = UIView()
view.backgroundColor = UIColor(r: 220, g: 220, b: 220)
view.translatesAutoresizingMaskIntoConstraints = false
return view
}()
let passwordTextField: UITextField = {
let tf = UITextField()
tf.placeholder = "Password"
tf.translatesAutoresizingMaskIntoConstraints = false
tf.isSecureTextEntry = true
return tf
}()
lazy var profileImageView: UIImageView = {
let imageView = UIImageView()
imageView.image = UIImage(named: "gameofthrones_splash")
imageView.translatesAutoresizingMaskIntoConstraints = false
imageView.contentMode = .scaleAspectFill
imageView.addGestureRecognizer(UITapGestureRecognizer(target: self, action: #selector(handleSelectProfileImageView)))
imageView.isUserInteractionEnabled = true
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() {
if keyboardShowing == true {
view.endEditing(true)
}
/*else {
view.endEditing(false)
}*/
let title = loginRegisterSegmentedControl.titleForSegment(at: loginRegisterSegmentedControl.selectedSegmentIndex)
loginRegisterButton.setTitle(title, for: UIControlState())
// 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
nameTextField.isHidden = loginRegisterSegmentedControl.selectedSegmentIndex == 0
fullNameTextFieldHeightAnchor?.isActive = false
fullNameTextFieldHeightAnchor = fullNameTextField.heightAnchor.constraint(equalTo: inputsContainerView.heightAnchor, multiplier: loginRegisterSegmentedControl.selectedSegmentIndex == 0 ? 1/2 : 1/3)
fullNameTextFieldHeightAnchor?.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(r: 61, g: 91, b: 151)
view.addSubview(inputsContainerView)
view.addSubview(loginRegisterButton)
view.addSubview(profileImageView)
view.addSubview(loginRegisterSegmentedControl)
setupInputsContainerView()
setupLoginRegisterButton()
setupProfileImageView()
setupLoginRegisterSegmentedControl()
NotificationCenter.default.addObserver(self, selector: #selector(keyboardWillShow), name: NSNotification.Name.UIKeyboardWillShow, object: nil)
NotificationCenter.default.addObserver(self, selector: #selector(keyboardWillHide), name: NSNotification.Name.UIKeyboardWillHide, object: nil)
//connecting to the application
SBDMain.initWithApplicationId("1662A8E8-F45F-454B-9E5E-02362342ECC5")
}
func keyboardWillShow(notification: NSNotification) {
print ("keyboardwillshow was called")
if self.keyboardShowing {
return
}
if self.keyboardShowing == false {
self.inputsContainerView.frame.origin.y -= 58
self.loginRegisterButton.frame.origin.y -= 58
self.loginRegisterSegmentedControl.frame.origin.y -= 58
self.profileImageView.frame.origin.y -= 58
}
self.keyboardShowing = true
}
func keyboardWillHide(notification: NSNotification) {
print ("keyboardwillhide was called")
if !self.keyboardShowing {
return
}
if self.keyboardShowing == true {
self.inputsContainerView.frame.origin.y += 58
self.loginRegisterButton.frame.origin.y += 58
self.loginRegisterSegmentedControl.frame.origin.y += 58
self.profileImageView.frame.origin.y += 58
}
self.keyboardShowing = false
}
func setupLoginRegisterSegmentedControl() {
//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: 150).isActive = true
profileImageView.heightAnchor.constraint(equalToConstant: 150).isActive = true
}
var inputsContainerViewHeightAnchor: NSLayoutConstraint?
var nameTextFieldHeightAnchor: NSLayoutConstraint?
var fullNameTextFieldHeightAnchor: 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
print(self.inputsContainerView.frame.origin.y)
inputsContainerView.widthAnchor.constraint(equalTo: view.widthAnchor, constant: -24).isActive = true
inputsContainerViewHeightAnchor = inputsContainerView.heightAnchor.constraint(equalToConstant: 150)
inputsContainerViewHeightAnchor?.isActive = true
inputsContainerView.addSubview(nameTextField)
inputsContainerView.addSubview(nameSeperatorView)
inputsContainerView.addSubview(fullNameTextField)
inputsContainerView.addSubview(fullNameSeperatorView)
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
nameSeperatorView.leftAnchor.constraint(equalTo: inputsContainerView.leftAnchor).isActive = true
nameSeperatorView.topAnchor.constraint(equalTo: nameTextField.bottomAnchor).isActive = true
nameSeperatorView.widthAnchor.constraint(equalTo: inputsContainerView.widthAnchor).isActive = true
nameSeperatorView.heightAnchor.constraint(equalToConstant: 1).isActive = true
//need x, y, width, height constraints
fullNameTextField.leftAnchor.constraint(equalTo: inputsContainerView.leftAnchor, constant: 12).isActive = true
fullNameTextField.topAnchor.constraint(equalTo: nameTextField.bottomAnchor).isActive = true
fullNameTextField.widthAnchor.constraint(equalTo: inputsContainerView.widthAnchor).isActive = true
fullNameTextFieldHeightAnchor = fullNameTextField.heightAnchor.constraint(equalTo: inputsContainerView.heightAnchor, multiplier: 1/3)
fullNameTextFieldHeightAnchor?.isActive = true
//need x, y, width, height constraints
fullNameSeperatorView.leftAnchor.constraint(equalTo: inputsContainerView.leftAnchor).isActive = true
fullNameSeperatorView.topAnchor.constraint(equalTo: fullNameTextField.bottomAnchor).isActive = true
fullNameSeperatorView.widthAnchor.constraint(equalTo: inputsContainerView.widthAnchor).isActive = true
fullNameSeperatorView.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: fullNameTextField.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: 50).isActive = true
}
override var preferredStatusBarStyle: UIStatusBarStyle {
return .lightContent
}
}
extension UIColor {
convenience init(r: CGFloat, g: CGFloat, b: CGFloat ) {
self.init(red: r/255, green: g/255, blue: b/255, alpha: 1)
}
}
不是移动 UIView 的元素，而是像这样移动整个视图框架：
func keyboardWillShow(notification: NSNotification) {
print ("keyboardwillshow was called")
if self.keyboardShowing {
return
}
if self.keyboardShowing == false {
/*self.inputsContainerView.frame.origin.y -= 58
self.loginRegisterButton.frame.origin.y -= 58
self.loginRegisterSegmentedControl.frame.origin.y -= 58
self.profileImageView.frame.origin.y -= 58*/
self.view.frame.origin.y -= 58
}
self.keyboardShowing = true
}
func keyboardWillHide(notification: NSNotification) {
print ("keyboardwillhide was called")
if !self.keyboardShowing {
return
}
if self.keyboardShowing == true {
/* self.inputsContainerView.frame.origin.y += 58
self.loginRegisterButton.frame.origin.y += 58
self.loginRegisterSegmentedControl.frame.origin.y += 58
self.profileImageView.frame.origin.y += 58*/
self.view.frame.origin.y += 58
}
self.keyboardShowing = false
}
我的应用加载后立即出现以下视图：
只要我点击全名文本字段，键盘就会显示并稍微移动元素以允许注册按钮保持显示。
当我移动到第二个文本字段时出现问题。它会导致视图完全重新加载并将视图中的所有元素放置到它们的原始位置，这使得键盘隐藏最低的元素。如下图所示
我已经搜索并检查了问题是否来自于键盘加载 keyboardwillshow() 和 keyboardwillhide 当这个问题发生时根本没有被调用，正如我所验证的那样。
从选择 UITextField 按下到另一个 UITextField 的转换是否会导致 UIView 重新加载 Xcode？请注意，UIText 字段位于
import UIKit
import SendBirdSDK
class LoginController: UIViewController {
var keyboardShowing = false
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(r: 88, g: 101, b: 161)
button.setTitle("Register", for: .normal)
button.translatesAutoresizingMaskIntoConstraints = false
button.setTitleColor(UIColor.white, for: .normal)
button.titleLabel?.font = UIFont.boldSystemFont(ofSize: 16)
button.addTarget(self, action: #selector(handleLoginRegister), for: .touchUpInside)
return button
}()
func handleLoginRegister() {
if loginRegisterSegmentedControl.selectedSegmentIndex == 0 {
handleLogin()
} else {
handleRegister()
}
}
func handleLogin(){
guard let userid = fullNameTextField.text, (passwordTextField.text != nil) else {
print ("Form is not valid")
return
}
SBDMain.connect(withUserId: userid, completionHandler: { (user, error) in
if error != nil {
print (error)
return
}
//successfully loggedin user
self.dismiss(animated: true, completion: nil)
})
}
let nameTextField: UITextField = {
let tf = UITextField()
tf.placeholder = "Full Name"
tf.translatesAutoresizingMaskIntoConstraints = false
return tf
}()
let nameSeperatorView: UIView = {
let view = UIView()
view.backgroundColor = UIColor(r: 220, g: 220, b: 220)
view.translatesAutoresizingMaskIntoConstraints = false
return view
}()
let fullNameTextField: UITextField = {
let tf = UITextField()
tf.placeholder = "Username"
tf.translatesAutoresizingMaskIntoConstraints = false
return tf
}()
let fullNameSeperatorView: UIView = {
let view = UIView()
view.backgroundColor = UIColor(r: 220, g: 220, b: 220)
view.translatesAutoresizingMaskIntoConstraints = false
return view
}()
let passwordTextField: UITextField = {
let tf = UITextField()
tf.placeholder = "Password"
tf.translatesAutoresizingMaskIntoConstraints = false
tf.isSecureTextEntry = true
return tf
}()
lazy var profileImageView: UIImageView = {
let imageView = UIImageView()
imageView.image = UIImage(named: "gameofthrones_splash")
imageView.translatesAutoresizingMaskIntoConstraints = false
imageView.contentMode = .scaleAspectFill
imageView.addGestureRecognizer(UITapGestureRecognizer(target: self, action: #selector(handleSelectProfileImageView)))
imageView.isUserInteractionEnabled = true
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() {
if keyboardShowing == true {
view.endEditing(true)
}
/*else {
view.endEditing(false)
}*/
let title = loginRegisterSegmentedControl.titleForSegment(at: loginRegisterSegmentedControl.selectedSegmentIndex)
loginRegisterButton.setTitle(title, for: UIControlState())
// 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
nameTextField.isHidden = loginRegisterSegmentedControl.selectedSegmentIndex == 0
fullNameTextFieldHeightAnchor?.isActive = false
fullNameTextFieldHeightAnchor = fullNameTextField.heightAnchor.constraint(equalTo: inputsContainerView.heightAnchor, multiplier: loginRegisterSegmentedControl.selectedSegmentIndex == 0 ? 1/2 : 1/3)
fullNameTextFieldHeightAnchor?.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(r: 61, g: 91, b: 151)
view.addSubview(inputsContainerView)
view.addSubview(loginRegisterButton)
view.addSubview(profileImageView)
view.addSubview(loginRegisterSegmentedControl)
setupInputsContainerView()
setupLoginRegisterButton()
setupProfileImageView()
setupLoginRegisterSegmentedControl()
NotificationCenter.default.addObserver(self, selector: #selector(keyboardWillShow), name: NSNotification.Name.UIKeyboardWillShow, object: nil)
NotificationCenter.default.addObserver(self, selector: #selector(keyboardWillHide), name: NSNotification.Name.UIKeyboardWillHide, object: nil)
//connecting to the application
SBDMain.initWithApplicationId("1662A8E8-F45F-454B-9E5E-02362342ECC5")
}
func keyboardWillShow(notification: NSNotification) {
print ("keyboardwillshow was called")
if self.keyboardShowing {
return
}
if self.keyboardShowing == false {
self.inputsContainerView.frame.origin.y -= 58
self.loginRegisterButton.frame.origin.y -= 58
self.loginRegisterSegmentedControl.frame.origin.y -= 58
self.profileImageView.frame.origin.y -= 58
}
self.keyboardShowing = true
}
func keyboardWillHide(notification: NSNotification) {
print ("keyboardwillhide was called")
if !self.keyboardShowing {
return
}
if self.keyboardShowing == true {
self.inputsContainerView.frame.origin.y += 58
self.loginRegisterButton.frame.origin.y += 58
self.loginRegisterSegmentedControl.frame.origin.y += 58
self.profileImageView.frame.origin.y += 58
}
self.keyboardShowing = false
}
func setupLoginRegisterSegmentedControl() {
//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: 150).isActive = true
profileImageView.heightAnchor.constraint(equalToConstant: 150).isActive = true
}
var inputsContainerViewHeightAnchor: NSLayoutConstraint?
var nameTextFieldHeightAnchor: NSLayoutConstraint?
var fullNameTextFieldHeightAnchor: 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
print(self.inputsContainerView.frame.origin.y)
inputsContainerView.widthAnchor.constraint(equalTo: view.widthAnchor, constant: -24).isActive = true
inputsContainerViewHeightAnchor = inputsContainerView.heightAnchor.constraint(equalToConstant: 150)
inputsContainerViewHeightAnchor?.isActive = true
inputsContainerView.addSubview(nameTextField)
inputsContainerView.addSubview(nameSeperatorView)
inputsContainerView.addSubview(fullNameTextField)
inputsContainerView.addSubview(fullNameSeperatorView)
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
nameSeperatorView.leftAnchor.constraint(equalTo: inputsContainerView.leftAnchor).isActive = true
nameSeperatorView.topAnchor.constraint(equalTo: nameTextField.bottomAnchor).isActive = true
nameSeperatorView.widthAnchor.constraint(equalTo: inputsContainerView.widthAnchor).isActive = true
nameSeperatorView.heightAnchor.constraint(equalToConstant: 1).isActive = true
//need x, y, width, height constraints
fullNameTextField.leftAnchor.constraint(equalTo: inputsContainerView.leftAnchor, constant: 12).isActive = true
fullNameTextField.topAnchor.constraint(equalTo: nameTextField.bottomAnchor).isActive = true
fullNameTextField.widthAnchor.constraint(equalTo: inputsContainerView.widthAnchor).isActive = true
fullNameTextFieldHeightAnchor = fullNameTextField.heightAnchor.constraint(equalTo: inputsContainerView.heightAnchor, multiplier: 1/3)
fullNameTextFieldHeightAnchor?.isActive = true
//need x, y, width, height constraints
fullNameSeperatorView.leftAnchor.constraint(equalTo: inputsContainerView.leftAnchor).isActive = true
fullNameSeperatorView.topAnchor.constraint(equalTo: fullNameTextField.bottomAnchor).isActive = true
fullNameSeperatorView.widthAnchor.constraint(equalTo: inputsContainerView.widthAnchor).isActive = true
fullNameSeperatorView.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: fullNameTextField.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: 50).isActive = true
}
override var preferredStatusBarStyle: UIStatusBarStyle {
return .lightContent
}
}
extension UIColor {
convenience init(r: CGFloat, g: CGFloat, b: CGFloat ) {
self.init(red: r/255, green: g/255, blue: b/255, alpha: 1)
}
}
不是移动 UIView 的元素，而是像这样移动整个视图框架：
func keyboardWillShow(notification: NSNotification) {
print ("keyboardwillshow was called")
if self.keyboardShowing {
return
}
if self.keyboardShowing == false {
/*self.inputsContainerView.frame.origin.y -= 58
self.loginRegisterButton.frame.origin.y -= 58
self.loginRegisterSegmentedControl.frame.origin.y -= 58
self.profileImageView.frame.origin.y -= 58*/
self.view.frame.origin.y -= 58
}
self.keyboardShowing = true
}
func keyboardWillHide(notification: NSNotification) {
print ("keyboardwillhide was called")
if !self.keyboardShowing {
return
}
if self.keyboardShowing == true {
/* self.inputsContainerView.frame.origin.y += 58
self.loginRegisterButton.frame.origin.y += 58
self.loginRegisterSegmentedControl.frame.origin.y += 58
self.profileImageView.frame.origin.y += 58*/
self.view.frame.origin.y += 58
}
self.keyboardShowing = false
}