Delete Parse PFUser Account - swift

Question

I have an app(written in Swift) that uses Parse and allows a User to create an account. I want the user to have the option to delete their account but can't seem to figure it out and not sure what I'm doing wrong. I want the user to have to verify their email and password for this to occur. Once they've deleted their account, an alert pops up and then once the user dismisses the alert it takes them back to the log in screen and out of the app.
This is what I've tried:
#IBAction func deleteAccount(sender: AnyObject) {
if PFUser.currentUser()?.username == emailAddressTextField.text && PFUser.currentUser()?.password == passwordTextFieldOne.text && PFUser.currentUser()?.password == passwordTextFieldTwo.text {
PFUser.currentUser()?.deleteInBackgroundWithBlock({ (success: Bool, error: NSError?) -> Void in
if success {
let alertController = UIAlertController(title: "Success!", message: "Now Please Login", preferredStyle: .Alert)
let enterAppAction = UIAlertAction(title: "OK", style: .Default, handler: { (UIAlertAction) -> Void in
dispatch_async(dispatch_get_main_queue(), { () -> Void in
let viewController:UIViewController = UIStoryboard(name: "Main", bundle: nil).instantiateViewControllerWithIdentifier("Login")
self.presentViewController(viewController, animated: true, completion: nil)
})
})
alertController.addAction(enterAppAction)
self.presentViewController(alertController, animated: true, completion: nil)
} else {
print(error)
self.displayAlert("Account deletion failed", message: "Please try again", actionTitle: "OK")
}
})
}
}

Answer 1

You can make a cloud function to verify that the user correctly entered their current password and have it return success/error to iOS, at which point you can delete the account (provided the successful completion of the password check). Here's a relevant Parse forum post.
From the referenced post:
Parse.Cloud.define(FUNCTION_PASSWORD_CHECK, function(request, response)
{
var password = request.params.password;
Parse.User.logIn(request.user.getUsername(), password, {
success: function(results)
{
response.success(true);
},
error: function() {
response.success(false);
}
});
});
Note: you can do a similar login function on iOS, but that may mess with the PFUser.currentUser() if the user incorrectly enters their password (I'm not sure on that). Also, the referenced function uses the request.user, which is advised (i.e., not passing the user as a param as well), so that it only works for users with sessions.

Answer 2

Your initial if-statement:
if PFUser.currentUser()?.username == emailAddressTextField.text && PFUser.currentUser()?.password == passwordTextFieldOne.text && PFUser.currentUser()?.password == passwordTextFieldTwo.text
The statement PFUser.currentUser()?.password will return nil as parse does not make a users password accessible to you. Therefore, you won't be able to compare the user's password with the text entered into the textfield.
To check if the user has in fact entered a password that matches an existing password:
PFUser.logInWithUsernameInBackground(PFUser.currentUser(), password:passwordTextFieldOne.text!) {
(user: PFUser?, error: NSError?) -> Void in
if user != nil {
//continue with delete function
} else {
//Display error
}
}