I am a beginner at Swift. I am trying to implement a sign in and signup page for a new app I am creating. I have looked at other questions asked that are similar to mine but couldn't resolve so I am asking for your help.
I must admit I am following an outdated tutorial which may not be compatible with the current Xcode.
#IBAction func signup(_ sender: Any) {
if username.text == "" || password.text == "" {
var alert = UIAlertController(title: "Error in form", message: "Please enter a username and password", preferredStyle: <#T##UIAlertControllerStyle#>.Alert)
alert.addAction(UIAlertAction(title: "OK", style: .Default, handler: { (action) -> Void in
self.dismissViewControllerAnimated(true, completion: nil)
}))
self.presentViewController(alert, animated: true, completion: nil)
}
}
Error messages I am receiving
1) Static member 'Alert' cannot be used on instance of type 'UIAlertControllerStyle'
2) Editor placeholder in source file
Can anyone offer any guidance? I can preview the page and it looks good but the build fails.
Thanks in advance.
The errors are on this line:
var alert = UIAlertController(title: "Error in form", message: "Please enter a username and password", preferredStyle: <#T##UIAlertControllerStyle#>.Alert)
Note the placeholder text after preferredStyle:. Remove that and put the proper value:
var alert = UIAlertController(title: "Error in form", message: "Please enter a username and password", preferredStyle: .Alert)
Unrelated to your issue, do not call self.dismiss... in the alert action. The alert will be dismissed automatically when the user taps on any button.
Related
I have a Xcode project which is a questionnaire, that has a few questions in and buttons that pass the data selected from one view to the other using segue tags.
At the end of the questionnaire I have a show data button in which will take the admin to the page with the data on as a whole, my issue is anyone can trigger the show data event and I was wondering how would I go about adding a password so that only the admin can see the data.
I've looked online and haven't seen anything that relates to what I need to happen, most things online go over creating a sign up page.
#IBAction func DataReveal(_ sender: UIButton)
{
ID = ID2.text
date = date2.text
Answer1 = answ1.text
Answer2 = answ2.text
}
self.performSegue(withIdentifier: "Link6", sender: self)
}
This takes the results from the other pages and passes them to the page that has the show data button, I just need to add password protection to it so only the password holder can see the data.
You need to Show UIAlert Action with textfield for pick password from user and match text with your password from Coredata,keychain or with API whatever you want.
UIAlert with textfield code is
let alertController = UIAlertController(title: "Test Title", message: "", preferredStyle: .alert)
alertController.addTextField { textField in
textField.placeholder = "Enter Password"
textField.isSecureTextEntry = true
}
let confirmActionBtn = UIAlertAction(title: "OK", style: .default) { [weak alertController] _ in
guard let alertController = alertController, let textField = alertController.textFields?.first else { return }
print("Password is \(String(describing: textField.text))")
// Just compare Entered String in textfield with your original password password
//if password is matched push or segue your required controller
}
alertController.addAction(confirmActionBtn)
let cancelAction = UIAlertAction(title: "Cancel", style: .cancel, handler: nil)
alertController.addAction(cancelAction)
self.present(alertController, animated: true, completion: nil)
In my password reset function the user can put in whatever he/she wants. It does not even needs to be a email address.
I would like to check for a valid email address, and that the email is registered in Parse Server
#IBAction func forgotPasswordButtonTapped(_ sender: Any) {
let forgotPasswordAlert = UIAlertController(title: "Forgot password?", message: "Please enter your email address", preferredStyle: .alert)
forgotPasswordAlert.view.tintColor = UIColor.red
forgotPasswordAlert.addTextField { (textField) in
textField.placeholder = "Email address"
}
forgotPasswordAlert.addAction(UIAlertAction(title: "Cancel", style: .cancel, handler: nil))
forgotPasswordAlert.addAction(UIAlertAction(title: "Reset password", style: .default, handler: { (action) in
let resetEmail = forgotPasswordAlert.textFields?.first?.text
PFUser.requestPasswordResetForEmail(inBackground: resetEmail!, block: { (success, error) in
if error != nil {
let resetFailedAlert = UIAlertController(title: "Error", message: error?.localizedDescription, preferredStyle: .alert)
resetFailedAlert.view.tintColor = UIColor.red
resetFailedAlert.addAction(UIAlertAction(title: "OK", style: .default, handler: nil))
self.present(resetFailedAlert, animated: true, completion: nil)
} else {
let resetEmailSentAlert = UIAlertController(title: "Password reset instructions sendt", message: "Please check your email", preferredStyle: .alert)
resetEmailSentAlert.view.tintColor = UIColor.red
resetEmailSentAlert.addAction(UIAlertAction(title: "OK", style: .default, handler: nil))
self.present(resetEmailSentAlert, animated: true, completion: nil)
}
})
}))
//PRESENT ALERT
self.present(forgotPasswordAlert, animated: true, completion: nil)
}
In your action you can check for email validity:-
forgotPasswordAlert.addAction(UIAlertAction(title: "Reset password", style: .default, handler: { (action) in
let resetEmail = forgotPasswordAlert.textFields?.first?.text
if self.isValidEmail(testStr: resetEmail) {
// Check of email registered on server should be done via this API and API should return error based on that.
PFUser.requestPasswordResetForEmail(inBackground: resetEmail!, block: { (success, error) in
if error != nil {
let resetFailedAlert = UIAlertController(title: "Error", message: error?.localizedDescription, preferredStyle: .alert)
resetFailedAlert.view.tintColor = UIColor.red
resetFailedAlert.addAction(UIAlertAction(title: "OK", style: .default, handler: nil))
self.present(resetFailedAlert, animated: true, completion: nil)
} else {
let resetEmailSentAlert = UIAlertController(title: "Password reset instructions sendt", message: "Please check your email", preferredStyle: .alert)
resetEmailSentAlert.view.tintColor = UIColor.red
resetEmailSentAlert.addAction(UIAlertAction(title: "OK", style: .default, handler: nil))
self.present(resetEmailSentAlert, animated: true, completion: nil)
}
})
} else {
//Show error that email entered is not correct format
// present the reset email alertbox again.
}
}))
func isValidEmail(testStr:String) -> Bool {
let emailRegEx = "[A-Z0-9a-z._%+-]+#[A-Za-z0-9.-]+\\.[A-Za-z]{2,64}"
let emailTest = NSPredicate(format:"SELF MATCHES %#", emailRegEx)
return emailTest.evaluate(with: testStr)
}
There is a parse email adapter to verify emails.
Verifying user email addresses and enabling password reset via email requires an email adapter. As part of the parse-server package we provide an adapter for sending email through Mailgun. To use it, sign up for Mailgun, and add this to your initialization code:
https://github.com/parse-community/parse-server
In regard to Parse Server not notifying the client that a user with the provided email address does not exist:
Pre 3.1.0 of Parse Server the request to reset a password returned an error if the email address was not found however this is a security risk as it allows an attacker to obtain user data for use in a brute force attack - see this explanation.
You can also take a look at the changelog and the PR that implemented this change.
It would still be possible to implement this yourself by querying the User class before making the password reset request. However, this should not be done in client code as it would require user data to be publicly accessible which is a major breach of privacy. It could also be implemented in cloud code using the master key so that user data could remain inaccessible to the public but this would present the same security risk mentioned above.
I am trying to display an alert that takes user input and then pops up the text that has been given
#IBAction func forgotPassword(_ sender: Any) {
//1. Create the alert controller.
let alert = UIAlertController(title: "Email Recovery", message: "Enter your email to recover your account", preferredStyle: .alert)
//2. Add the text field. You can configure it however you need.
alert.addTextField { (textField) in
textField.text = ""
}
// 3. Grab the value from the text field, and print it when the user clicks OK.
alert.addAction(UIAlertAction(title: "OK", style: .default, handler: { [weak alert] (_) in
let textField = alert?.textFields![0] // Force unwrapping because we know it exists.
print("An email has been sent to \(String(describing: textField?.text)) for account recovery")
}))
// 4. Present the alert.
self.present(alert, animated: true, completion: nil)
}
The input works fine as well the output although instead of giving another alert, it just prints what I need in the console.
Am I missing something?
I guess you misunderstood a bit: "print" is just printing on your console, if you want to open a new alert after touching on the "ok" button, you may want to complete your code with:
alert.addAction(UIAlertAction(title: "OK", style: .default, handler: { [weak alert, weak self] (_) in
let message = "An email has been sent to \(alert?.textFields?.first?.text ?? "") for account recovery"
let innerAlert = UIAlertController(title: nil, message: message, preferredStyle: .alert)
innerAlert.addAction(UIAlertAction(title: "OK", style: .default, handler:nil))
self?.present(innerAlert, animated: true, completion: nil)
}))
I am trying to print the error to the user using alertview.
Here is my code :::
if error != nil{
let DisplayAlert = UIAlertController(title: "Error!!", message: error?.description, preferredStyle: .Alert)
DisplayAlert.addAction(UIAlertAction(title: "OK", style: .Default, handler: nil))
}
When I run the code I see the following in the console and I do not see any alert displayed to user.
"Attempting to load the view of a view controller while it is deallocating is not allowed and may result in undefined behavior"
What should i do to fix this issue.? Pls help.
Thanks !!!
Looks like you have forgot to present the alert
if error != nil{
let DisplayAlert = UIAlertController(title: "Error!!", message: error?.description, preferredStyle: .Alert)
DisplayAlert.addAction(UIAlertAction(title: "OK", style: .Default, handler: nil))
self.presentViewController(DisplayAlert, animated: true, completion: nil)
}
I'm having trouble understanding Firebase's documentation. In my Login ViewController, I have a button that allows users to reset password. So when user presses the button, it opens an alert controller where user would have to input their email to be sent a password reset/ recovery.
#IBAction func forgottenPassword(sender: AnyObject) {
var loginTextField: UITextField?
let alertController = UIAlertController(title: "Password Recovery", message: "Please enter your email address", preferredStyle: .Alert)
let ok = UIAlertAction(title: "OK", style: .Default, handler: { (action) -> Void in
if loginTextField?.text != "" {
DataService.dataService.BASE_REF.resetPasswordForUser(loginTextField?.text, withCompletionBlock: { (error) in
if (error == nil) {
self.showErrorAlert("Password reset", msg: "Check your inbox to reset your password")
} else {
print(error)
self.showErrorAlert("Unidentified email address", msg: "Please re-enter the email you registered with")
}
})
}
print("textfield is empty")
})
let cancel = UIAlertAction(title: "Cancel", style: .Cancel) { (action) -> Void in
}
alertController.addAction(ok)
alertController.addAction(cancel)
alertController.addTextFieldWithConfigurationHandler { (textField) -> Void in
// Enter the textfiled customization code here.
loginTextField = textField
loginTextField?.placeholder = "Enter your login ID"
}
presentViewController(alertController, animated: true, completion: nil)
}
func showErrorAlert(title: String, msg: String) {
let alert = UIAlertController(title: title, message: msg, preferredStyle: .Alert)
let action = UIAlertAction(title: "OK", style: .Default, handler: nil)
alert.addAction(action)
presentViewController(alert, animated: true, completion: nil)
}
Does the Firebase Backend server automatically generate the code to send the user a reset to their email?
Would i have to provide further code? Such as sendPasswordResetForEmail()? ... Or does the Firebase Backend service handles it from here? ...
Is that the function you are looking for ?
resetPasswordForUser(email:withCompletionBlock:)
Just call it on your Firebase instance.
Then go to your app dashboard to customize email that will be send to user upon password changes.