Swift - Google Firebase Authentication with Email - ios

Question

I am trying to run the example of Google Firebase Authentication with Email. As I tried the email example of https://github.com/firebase/quickstart-ios/blob/master/authentication/AuthenticationExampleSwift/EmailViewController.swift I get errors in the project.
My Code looks like this:
#IBAction func loginButtonTapped(_ sender: AnyObject) {
if let email = self.userEmailTextField.text, let password = self.userPasswordTextField.text {
showSpinner({
// [START headless_email_auth]
FIRAuth.auth()?.signIn(withEmail: email, password: password) { (user, error) in
// [START_EXCLUDE]
self.hideSpinner({
if let error = error {
self.showMessagePrompt(error.localizedDescription)
return
}
self.navigationController!.popViewController(animated: true)
})
// [END_EXCLUDE]
}
// [END headless_email_auth]
})
} else {
self.showMessagePrompt("email/password can't be empty")
}
}
I get an error on showSpinner({...}) and at the very end on self.showMessagePrompt("email/password can't be empty"):
However, the error from the very end showMessagePrompt does not appear on self.showMessagePrompt few lines before. Maybe it has to do with my Swift Version, I tried to convert to 3, but my complete project was broken after that.

Answer 1

Because in that quickstart-ios, they uses bridging-header of UIViewController+Alerts.h file which is not implemented by you and not added by you in your project.
So one solution is to use UIViewController+Alerts.h as bridging header in your view controller or remove/modify your code something like this code..
#IBAction func loginButtonTapped(_ sender: AnyObject) {
if let email = self.userEmailTextField.text, let password = self.userPasswordTextField.text {
// [START headless_email_auth]
FIRAuth.auth()?.signIn(withEmail: email, password: password) { (user, error) in
// [START_EXCLUDE]
if let error = error {
print(error.localizedDescription)
//show alert
return
}
self.navigationController!.popViewController(animated: true)
// [END_EXCLUDE]
}
// [END headless_email_auth]
} else {
print("email/password can't be empty")
//show alert
}
}
You can find UIViewController+Alerts.h and UIViewController+Alerts.m files here