Guard let not distinguishing inputs - swift

Question

I have a SIMPLE login screen and I am protecting against missing data as follows:
#IBAction func btnLoginTapped(_ sender: Any)
{
guard let email = emailTextField.text, !email.isEmpty else
{
self.showMessage(messageToDisplay: "Email Address is required", title: "")
return
}
guard let password = passwordTextField.text, !password.isEmpty else
{
self.showMessage(messageToDisplay: "Password is required", title: "")
return
}
....
I load the app on my device and press login and get the alert "Email Address is required". I enter my email address and press login and get the alert "Email Address is required" and NOT "Password is required"
How can that be???

Answer 1

If there's a problem with the first guard let, we print "Email Address is required" and return.
Thus, the second guard let is never encountered and "Password is required" is never printed.
Your code will never print both messages; that would be impossible, the way you've written the code.
So we have to conclude that one of the tests in the first guard let is failing. But you have not given enough information for us to know why that is. Perhaps emailTextField is nil? Perhaps showMessage doesn't do what you think it does? You could be making a lot of wrong assumptions here. But the logic of your code is clear.