How to check if UITextField's text is valid email?

Question

I have a view controller with 3 UITextFields (username, email, and password).

I need a method that checks first, if all fields have text in them, then check if the e

Answer 1

try this:-

    if(![emailTextField.text isEqualToString:@""] && ![userNameTextField.text isEqualToString:@""] && ![passwordTextField.text isEqualToString:@""])
        {

        NSString *emailRegEx = @"[A-Z0-9a-z._%+-]+@[A-Za-z0-9.-]+\\.[A-Za-z]{2,4}";
        NSPredicate *emailTest = [NSPredicate predicateWithFormat:@"SELF MATCHES %@", emailRegEx];
        //Valid email address
        if ([emailTest evaluateWithObject:emailTextField.text] == YES) 
        {
    }
    else
    {
    //not valid email address
    }
}


      else
        {
        //any of the text field is empty
        }