Does anyone knows how to create an UIAlertController like that one that whatsapp did in the next attachment (beside of creating custom UI)
well, as a result from the discussion above, a solution found.
basic idea is to use "contentViewController"
implementation smaple
ViewController.swift
#IBAction func testActionSheetAction(_ sender: Any) {
let sheet = UIAlertController(title: "test", message: nil, preferredStyle: .actionSheet)
let phoneAction = UIAlertAction(title: "", style: .default) { (_) in
print("phone action")
}
phoneAction.mode = .phone
sheet.addAction(phoneAction)
let homeAction = UIAlertAction(title: "", style: .default) { (_) in
print("home action")
}
homeAction.mode = .home
sheet.addAction(homeAction)
sheet.addAction(UIAlertAction(title: "cancel", style: .cancel, handler: nil))
self.present(sheet, animated: true, completion: nil)
}
ActionSheetContentViewController.swift
import UIKit
extension UIAlertAction{
var mode : ActionSheetContentViewController.Mode?{
set{
let vc = ActionSheetContentViewController.viewController(with: newValue)
self.setValue(vc, forKey: "contentViewController")
}
get{
if let vc = value(forKey: "contentViewController") as? ActionSheetContentViewController{
return vc.mode
}
return nil
}
}
}
class ActionSheetContentViewController: UIViewController {
enum Mode{
case home
case phone
var image : UIImage{
get{
switch self {
case .home: return #imageLiteral(resourceName: "icon_home")
case .phone: return #imageLiteral(resourceName: "icon_phone")
}
}
}
var title : String{
get{
switch self {
case .home: return NSLocalizedString("home", comment: "home")
case .phone: return NSLocalizedString("phone", comment: "phone")
}
}
}
}
#IBOutlet weak var label: UILabel!
#IBOutlet weak var imaegView: UIImageView!
var mode : Mode?
override func viewDidLoad() {
super.viewDidLoad()
label.text = mode?.title
imaegView.image = mode?.image
}
class func viewController(with mode : Mode?) -> UIViewController{
let storyboard = UIStoryboard(name: "Main", bundle: .main)
let vc = storyboard.instantiateViewController(withIdentifier: "ActionSheetContentViewController") as! ActionSheetContentViewController
vc.mode = mode
return vc
}
}
ActionSheetContentViewController in storyboard
a screenshot
Yes, you need to add a UITableView to the UIAlertController.
alertController.setValue([customTableGoesHere], forKey: "contentViewController")
Related
Line where error is:
self.passwordField.delegate = self
Code from the button:
#IBAction func unwindToRed(_ sender: Any) {
do {
try Auth.auth().signOut()
let ViewController1 = ViewController()
let ViewNavigationController = UINavigationController(rootViewController: ViewController1)
self.present(ViewNavigationController, animated: true, completion: nil)
} catch let err {
print(err)
}
}
This is the relevant homepage code:
class ViewController: UIViewController, UITextFieldDelegate {
#IBOutlet weak var emailField: UITextField!
#IBOutlet weak var passwordField: UITextField!
var userUID: String!
var databaseRef: DatabaseReference!
override func viewDidLoad() {
super.viewDidLoad()
databaseRef = Database.database().reference()
self.passwordField.delegate = self
self.emailField.delegate = self
emailField.attributedPlaceholder = NSAttributedString(string: "Email",
attributes: [NSAttributedString.Key.foregroundColor: UIColor.gray])
passwordField.attributedPlaceholder = NSAttributedString(string: "Password",
attributes: [NSAttributedString.Key.foregroundColor: UIColor.gray])
}
override func viewDidAppear(_ animated: Bool) {
if let _ = KeychainWrapper.standard.string(forKey: "uid") {
self.performSegue(withIdentifier: "tohome", sender: nil)
}
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
#IBAction func signInPressed(_ sender: Any) {
Auth.auth().createUser(withEmail: (emailField.text ?? ""), password: (passwordField.text ?? "")) { (user, error) in
if let _eror = error {
//something bad happning
print(_eror.localizedDescription )
let alert = UIAlertController(title: "Error", message: "Invalid Entry or Duplicate.", preferredStyle: UIAlertController.Style.alert)
let action = UIAlertAction(title: "Ok", style: .default, handler: nil)
alert.addAction(action)
self.present(alert, animated: true, completion: nil)
}else{
//user registered successfully
print(user as Any)
if let userID = user?.uid {
KeychainWrapper.standard.set((userID), forKey: "uid")
let databaseRef = Database.database().reference()
databaseRef.child("people").child(userID).child("users").setValue(self.emailField.text!)
databaseRef.child("people").child(userID).child("postID").setValue(userID)
self.performSegue(withIdentifier: "tohome", sender: nil)
}
}
}
}
#IBAction func loginInPressed(_ sender: Any) {
Auth.auth().signIn(withEmail: (emailField.text ?? ""), password: (passwordField.text ?? "")) { (user, error) in
if let _eror = error {
//something bad happning
print(_eror.localizedDescription )
let alert = UIAlertController(title: "Error", message: "Incorrect Email or Password.", preferredStyle: UIAlertController.Style.alert)
let action = UIAlertAction(title: "Ok", style: .default, handler: nil)
alert.addAction(action)
self.present(alert, animated: true, completion: nil)
}else{
//user registered successfully
print(user as Any)
if let userID = user?.uid {
KeychainWrapper.standard.set((userID), forKey: "uid")
self.performSegue(withIdentifier: "tohome", sender: nil) }
}
}
}
Problem is hiding in this line:
#IBAction func unwindToRed(_ sender: Any) {
do {
try Auth.auth().signOut()
let ViewController1 = ViewController() // <-- This is the problem
let ViewNavigationController = UINavigationController(rootViewController: ViewController1)
self.present(ViewNavigationController, animated: true, completion: nil)
} catch let err {
print(err)
}
}
Because you are using storyboards to create your views, you should instantiate your view controller from storyboard. To do this right please refer to Creating View Controllers from Storyboard.
If you're new to iOS development or you don't know why this is required please refer to this post which will explain instantiating view controller from storyboard vs. creating new instance.
I have created BaseViewController to use as subclass for all of my view controllers so that I can show alert whenever I need any progess to show and hide which is lazy variable.
Everything is cool until now. But I figured out that all my viewcontroller which are inherting from this are not releasing. What is the problem?
class BaseViewController: UIViewController {
override func viewDidLoad() {
super.viewDidLoad()
self.view.backgroundColor = UIColor(red: 0.4 / 255.0, green: 100 / 215.0, blue: 120 / 255.0, alpha: 1.0)
}
override var preferredStatusBarStyle: UIStatusBarStyle {
return preferredStatusBarStyle_Internal()
}
override var supportedInterfaceOrientations: UIInterfaceOrientationMask {
return supportedInterfaceOrientations_Internal()
}
lazy var progressHUD: MBProgressHUD = {
if let navController = self.navigationController {
return navController.HUD
}
return self.HUD
}()
func showAlert(_ title: String?, message: String) {
let alert = UIAlertController(title: title, message: message, preferredStyle: .alert)
let action = UIAlertAction(title: "OK", style: .cancel, handler: { _ in
DispatchQueue.main.async {
self.progressHUD.hide(animated: false, afterDelay: 1.0)
}
})
alert.addAction(action)
present(alert, animated: true, completion: nil)
}
func showPermissionDeniedAlert(_ message: String) {
let alertController = UIAlertController(title: message, message: "Go to Settings?".localized, preferredStyle: .alert)
let settingsAction = UIAlertAction(title: "Settings".localized, style: .default) { _ in
guard let settingsUrl = URL(string: UIApplicationOpenSettingsURLString) else {
return
}
if UIApplication.shared.canOpenURL(settingsUrl) {
if #available(iOS 10.0, *) {
UIApplication.shared.open(settingsUrl, completionHandler: { success in
print("Settings opened: \(success)") // Prints true
})
} else {
let success = UIApplication.shared.openURL(settingsUrl)
print("Settings opened: \(success)")
}
}
}
alertController.addAction(settingsAction)
let cancelAction = UIAlertAction(title: "Cancel", style: .default, handler: nil)
alertController.addAction(cancelAction)
present(alertController, animated: true, completion: nil)
}
}
extension UIViewController {
func preferredStatusBarStyle_Internal() -> UIStatusBarStyle {
return .lightContent
}
func supportedInterfaceOrientations_Internal() -> UIInterfaceOrientationMask {
return isiPad() ? .allButUpsideDown : .all
}
var HUD: MBProgressHUD {
let progressHUD = MBProgressHUD(viewController: self)
return progressHUD
}
}
If the view controller is not releasing it means you are creating retain cycle.
It could be in two places
pass weakself to async block.
DispatchQueue.main.async { [weak self] in
self?.progressHUD.hide(animated: false, afterDelay: 1.0)
}
passing a weak reference if MBProgressHUD init is creating retain cycle
var HUD: MBProgressHUD {
// you can also use weak self
unowned let unownedSelf = self
let progressHUD = MBProgressHUD(viewController: unownedSelf)
return progressHUD
}
I had created a login page and registration page and saved the registered data in core data database but now I need to authenticate the user so that in order to move to another view controller.
here is my code ....
import UIKit
import CoreData
class ViewController: UIViewController {
#IBOutlet weak var usernameTextField: UITextField!
#IBOutlet weak var passwordTextField: UITextField!
#IBOutlet weak var loginButton: UIButton!
#IBOutlet weak var registerButton: UIButton!
var accounts = [Account]()
let context = (UIApplication.shared.delegate as! AppDelegate).persistentContainer.viewContext
override func viewDidLoad() {
super.viewDidLoad()
self.getAccountData()
loginButton.layer.cornerRadius = 12.0;
registerButton.layer.cornerRadius = 12.0;
usernameTextField.layer.borderWidth = 1;
usernameTextField.layer.borderColor = UIColor.darkGray .cgColor;
usernameTextField.layer.cornerRadius = 5;
usernameTextField.setValue(UIColor.lightGray, forKeyPath: "_placeholderLabel.textColor");
passwordTextField.layer.borderWidth = 1;
passwordTextField.layer.borderColor = UIColor.darkGray.cgColor;
passwordTextField.layer.cornerRadius = 5;
passwordTextField.setValue(UIColor.lightGray, forKeyPath: "_placeholderLabel.textColor");
// Do any additional setup after loading the view, typically from a nib.
}
#IBAction func registerButton(_ sender: Any) {
self.performSegue(withIdentifier: "SecondViewController", sender: nil)
return
}
override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
_ = segue.destination as! SecondViewController
}
#IBAction func loginButton(_ sender: Any) {
if (usernameTextField.text?.isEmpty)! == true
{
let usernamealert = UIAlertController(title: "Warning", message: "Please enter username", preferredStyle: UIAlertControllerStyle.alert)
usernamealert.addAction(UIAlertAction(title: "OK", style: UIAlertActionStyle.default, handler: nil))
self.present(usernamealert, animated: true, completion: nil)
}
if (passwordTextField.text?.isEmpty)! == true {
let passwordalert = UIAlertController(title: "Warning", message: "Please enter password", preferredStyle: UIAlertControllerStyle.alert)
passwordalert.addAction(UIAlertAction(title: "OK", style: UIAlertActionStyle.default, handler: nil))
self.present(passwordalert, animated: true, completion: nil)
}
let appDelegate = UIApplication.shared.delegate as! AppDelegate
let managedContext = appDelegate.persistentContainer.viewContext
let request = NSFetchRequest<NSFetchRequestResult>(entityName: "Account")
do
{
let results = try context.fetch(request)
if results.count > 0
{
for result in results as! [NSManagedObject]
{
if let firstname = result.value(forKey: "firstName") as? String
{
if(usernameTextField.text == firstname)
{
if let password = result.value(forKey: "lastname") as? String
{
if(passwordTextField.text == password)
{
}else{
let passwordalert = UIAlertController(title: "Warning", message: "Wrong password", preferredStyle: UIAlertControllerStyle.alert)
passwordalert.addAction(UIAlertAction(title: "OK", style: UIAlertActionStyle.default, handler: nil))
self.present(passwordalert, animated: true, completion: nil)
}
}
}
}
}
}
}
}
#IBAction func unwindToView(segue: UIStoryboardSegue){}
func getAccountData() {
let context = (UIApplication.shared.delegate as! AppDelegate).persistentContainer.viewContext
do {
accounts = try context.fetch(Account.fetchRequest())
} catch {
print("Fetching Failed")
}
}
Try like this
call this method from viewWillAppear
self.getAccountData()
and put below code in loginButton() method After the validation done
var username = ""
var passString = ""
var checkRecord = false
for item in accounts
{
username = item.value(forKeyPath: "firstName") as! String
passString = item.value(forKeyPath: "lastname") as! String
if username == usernameTextField.text && passwordTextField.text == passString
{
checkRecord = true;
}
}
if checkRecord == true
{
//succesfull authenticate
}
else
{
//show the error message
}
In an app I am currently writing, I have a string named 'User' which stores the user's name for a game. The value of the string, when printed anywhere else in the Swift file, prints the value that I have set, as an optional.
If I try to use this string as the title of an action sheet action, the string is automatically set to nil, which I can see as both the title of the action and which is printed when I ask it to print(user).
If anyone could shed some light as to why this is happening, or how to prevent it, that would be great. I have also posted my Swift file below, thanks.
import UIKit
class MainViewController: UIViewController {
#IBOutlet weak var segmentedControl: UISegmentedControl!
#IBOutlet weak var firstView: UIView!
#IBOutlet weak var secondView: UIView!
var user:String!
var playerTwo:String!
var playerThree:String!
var playerFour:String!
var playerFive:String!
var playerSix:String!
var userCards = [String]()
override func viewDidLoad() {
super.viewDidLoad()
firstView?.isHidden = false
secondView?.isHidden = true
}
#IBAction func valueDidChange(_ sender: UISegmentedControl) {
switch segmentedControl.selectedSegmentIndex {
case 0:
firstView.isHidden = false
secondView.isHidden = true
case 1:
firstView.isHidden = true
secondView.isHidden = false
default:
break;
}
}
#IBAction func confirm(_ sender: UIButton) {
let alertController = UIAlertController(title: "Action Sheet", message: "What would you like to do?", preferredStyle: .actionSheet)
let userButton = UIAlertAction(title: user /* Here I have tried with putting both 'user', and "\(user)"*/, style: .default, handler: { (action) -> Void in
print("User button tapped")
})
let deleteButton = UIAlertAction(title: "Delete button test", style: .destructive, handler: { (action) -> Void in
print("Delete button tapped")
})
let cancelButton = UIAlertAction(title: "Cancel", style: .cancel, handler: { (action) -> Void in
print("Cancel button tapped")
})
alertController.addAction(userButton)
alertController.addAction(deleteButton)
alertController.addAction(cancelButton)
self.present(alertController, animated: true, completion: nil)
}
}
The value is passed into the above file directly from this code in another file:
override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
if segue.identifier == "showMainController" {
let VC = segue.destination as! MainViewController
VC.user = self.user
if playerTwo != nil {
VC.playerTwo = self.playerTwo
}
if playerThree != nil {
VC.playerThree = self.playerThree
}
if playerFour != nil {
VC.playerFour = self.playerFour
}
if playerFive != nil {
VC.playerFive = self.playerFive
}
if playerSix != nil {
VC.playerSix = self.playerSix
}
}
}
The value is, however, passed through several view controllers, and is initially set here:
if (meTextField.text?.isEmpty)! == false {
let p1 = meTextField.text!
initialPlayersDict["player1"] = "\(p1)"
if errLabelNotBlank {
errorLabel.text = ""
errLabelNotBlank = false
}
}
So I am creating an iOS application and want to allow users to log in and out/register. I am doing this using core Data and currently my program allows users to register, but the data isn't saved so when they try and log in, it says incorrect username/password, in other words, the program isn't recognizing the fact that the user already input their information when creating/registering their account and as a result cannot load the information they input and won't allow the user to log in. This is the code I have for when a user clicks the register button - please help:
import UIKit
import CoreData
class RegisterPageViewController: UIViewController {
#IBOutlet weak var userEmailTextField: UITextField!
#IBOutlet weak var userPasswordTextField: UITextField!
#IBOutlet weak var confirmPasswordTextField: UITextField!
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view.
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
#IBAction func registerButtonTapped(sender: AnyObject) {
let userEmail = userEmailTextField.text
let userPassword = userPasswordTextField.text
let userConfirmPassword = confirmPasswordTextField.text
if (userEmail.isEmpty || userPassword.isEmpty || userConfirmPassword.isEmpty) {
displayMyAlertMessage("You haven't filled out all the fields.")
return;
}
if (userPassword != userConfirmPassword) {
displayMyAlertMessage("Passwords do not match.")
return;
}
var appDel: AppDelegate = (UIApplication.sharedApplication().delegate as AppDelegate)
var context:NSManagedObjectContext = appDel.managedObjectContext!
var newUser = NSEntityDescription.insertNewObjectForEntityForName("Users", inManagedObjectContext: context) as NSManagedObject
context.save(nil)
var successAlert = UIAlertController(title: "Alert", message: "Successfully registered.", preferredStyle: UIAlertControllerStyle.Alert)
let okAction = UIAlertAction(title: "OK", style: UIAlertActionStyle.Default) { action in
self.dismissViewControllerAnimated(true, completion: nil)
}
successAlert.addAction(okAction)
self.presentViewController(successAlert, animated: true, completion: nil)
}
#IBAction func haveAnAccountButtonTapped(sender: AnyObject) {
self.dismissViewControllerAnimated(true, completion: nil)
}
func displayMyAlertMessage(userMessage:String) {
var alert = UIAlertController(title: "Alert!", message: userMessage, preferredStyle: UIAlertControllerStyle.Alert)
let okAction = UIAlertAction(title: "OK", style: UIAlertActionStyle.Default, handler: nil)
alert.addAction(okAction)
self.presentViewController(alert, animated: true, completion: nil)
}
/*
// MARK: - Navigation
// In a storyboard-based application, you will often want to do a little preparation before navigation
override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?) {
// Get the new view controller using segue.destinationViewController.
// Pass the selected object to the new view controller.
}
*/
}
If you already have in your *.xcdatamodel file Entity 'Users' with Attributes 'name' and 'password', you need to store data from textField, for example:
...
var newUser = NSEntityDescription.insertNewObjectForEntityForName("Users", inManagedObjectContext: context) as NSManagedObject
newUser.setValue(userEmail, forKey: "name")
newUser.setValue(userPassword, forKey: "password")
context.save(nil)
...
SWIFT 4
We Can Create A Login And SignUp In Swift 4 Using Core Data
Here I am Going to create a New project In Swift 4 With Xcode 9 And Follow Me With An Example Task For Core Data
Create New Project With Select Use CoreData
Create an Entity -User
Add fields - name, age,password,email….Plz Select All the fields type with String
Design Storyboard With Apropriate objects….
Create Login,signup,UserDetails,logout VC’s
Import CoreData For Apropriate Classes
For Connect Views We can Use StoryboardId And Segue For the Views
Create LoginVc
import UIKit
import CoreData
class LoginViewController: UIViewController {
#IBOutlet var nameTextCheck: UITextField!
#IBOutlet var passwordTextCheck: UITextField!
var context = (UIApplication.shared.delegate as! AppDelegate).persistentContainer.viewContext
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view.
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
#IBAction func signUPButtonAction(_ sender: Any) {
let request = NSFetchRequest<NSFetchRequestResult>(entityName: "User")
let searchString = self.nameTextCheck.text
let searcghstring2 = self.passwordTextCheck.text
request.predicate = NSPredicate (format: "name == %#", searchString!)
do
{
let result = try context.fetch(request)
if result.count > 0
{
let n = (result[0] as AnyObject).value(forKey: "name") as! String
let p = (result[0] as AnyObject).value(forKey: "password") as! String
// print(" checking")
if (searchString == n && searcghstring2 == p)
{
let UserDetailsVc = self.storyboard?.instantiateViewController(withIdentifier: "UserDetailsViewController") as! UserDetailsViewController
UserDetailsVc.myStringValue = nameTextCheck.text
self.navigationController?.pushViewController(UserDetailsVc, animated: true)
}
else if (searchString == n || searcghstring2 == p)
{
// print("password incorrect ")
let alertController1 = UIAlertController (title: "no user found ", message: "password incorrect ", preferredStyle: UIAlertControllerStyle.alert)
alertController1.addAction(UIAlertAction(title: "OK", style: .default, handler: nil))
present(alertController1, animated: true, completion: nil)
}
}
else
{
let alertController1 = UIAlertController (title: "no user found ", message: "invalid username ", preferredStyle: UIAlertControllerStyle.alert)
alertController1.addAction(UIAlertAction(title: "OK", style: .default, handler: nil))
present(alertController1, animated: true, completion: nil)
print("no user found")
}
}
catch
{
print("error")
}
}
}
Create SignUpVc
import UIKit
import CoreData
class SignUpViewController: UIViewController {
#IBOutlet var nameText: UITextField!
#IBOutlet var passwordText: UITextField!
#IBOutlet var ageText: UITextField!
#IBOutlet var emailText: UITextField!
override func viewDidLoad() {
super.viewDidLoad()
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
}
#IBAction func SignUPAction(_ sender: Any) {
if isValidInput(Input: nameText.text!)
{
if isPasswordValid(passwordText.text!)
{
if isValidEmail(testStr: emailText.text!)
{
let _:AppDelegate = (UIApplication.shared.delegate as! AppDelegate)
let context:NSManagedObjectContext = (UIApplication.shared.delegate as! AppDelegate).persistentContainer.viewContext
let newUser = NSEntityDescription.insertNewObject(forEntityName: "User", into: context) as NSManagedObject
newUser.setValue(nameText.text, forKey: "name")
newUser.setValue(passwordText.text, forKey: "password")
newUser.setValue(emailText.text, forKey: "email")
newUser.setValue(ageText.text, forKey: "age")
do {
try context.save()
} catch {}
print(newUser)
print("Object Saved.")
let alertController1 = UIAlertController (title: "Valid ", message: "Sucess ", preferredStyle: UIAlertControllerStyle.alert)
alertController1.addAction(UIAlertAction(title: "OK", style: .default, handler: nil))
present(alertController1, animated: true, completion: nil)
let UserDetailsVc = self.storyboard?.instantiateViewController(withIdentifier: "logoutViewController") as! logoutViewController
self.navigationController?.pushViewController(UserDetailsVc, animated: true)
}else
{
print("mail check")
let alertController1 = UIAlertController (title: "Fill Email id", message: "Enter valid email", preferredStyle: UIAlertControllerStyle.alert)
alertController1.addAction(UIAlertAction(title: "OK", style: .default, handler: nil))
present(alertController1, animated: true, completion: nil)
}
}
else
{
print("pswd check")
let alertController1 = UIAlertController (title: "Fill the password ", message: "Enter valid password", preferredStyle: UIAlertControllerStyle.alert)
alertController1.addAction(UIAlertAction(title: "OK", style: .default, handler: nil))
present(alertController1, animated: true, completion: nil)
}
}
else
{
print("name check")
let alertController1 = UIAlertController (title: "Fill the Name ", message: "Enter valid username", preferredStyle: UIAlertControllerStyle.alert)
alertController1.addAction(UIAlertAction(title: "OK", style: .default, handler: nil))
present(alertController1, animated: true, completion: nil)
}
}
func isValidInput(Input:String) -> Bool
{
let RegEx = "\\A\\w{3,18}\\z"
let Test = NSPredicate(format:"SELF MATCHES %#", RegEx)
return Test.evaluate(with: Input)
}
func isPasswordValid(_ password : String) -> Bool{
let passwordTest = NSPredicate(format: "SELF MATCHES %#", "^(?=.*[a-z])(?=.*[$#$#!%*?&])[A-Za-z\\d$#$#!%*?&]{3,}")
return passwordTest.evaluate(with: password)
}
func isValidEmail(testStr:String) -> Bool {
// print("validate calendar: \(testStr)")
let emailRegEx = "[A-Z0-9a-z._%+-]+#[A-Za-z0-9.-]+\\.[A-Za-z]{2,}"
let emailTest = NSPredicate(format:"SELF MATCHES %#", emailRegEx)
return emailTest.evaluate(with: testStr)
}
}
Create UserDetailsVC
import UIKit
import CoreData
class UserDetailsViewController: UIViewController {
#IBOutlet var nameText: UITextField!
#IBOutlet var ageText: UITextField!
#IBOutlet var emailText: UITextField!
var context = (UIApplication.shared.delegate as! AppDelegate).persistentContainer.viewContext
var myStringValue : String?
override func viewDidLoad() {
super.viewDidLoad()
}
override func viewWillAppear(_ animated: Bool) {
showData()
super.viewWillAppear(animated)
}
override func didReceiveMemoryWarning()
{
super.didReceiveMemoryWarning()
}
func showData()
{
let request = NSFetchRequest<NSFetchRequestResult>(entityName: "User")
request.predicate = NSPredicate (format: "name == %#", myStringValue!)
do
{
let result = try context.fetch(request)
if result.count > 0
{
let nameData = (result[0] as AnyObject).value(forKey: "name") as! String
let agedata = (result[0] as AnyObject).value(forKey: "age") as! String
let emaildata = (result[0] as AnyObject).value(forKey: "email") as! String
nameText.text = nameData
ageText.text = agedata
emailText.text = emaildata
}
}
catch {
//handle error
print(error)
}
}
}