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iOS Build a Self-Destructing Message iPhone App Using Parse.com as a Backend and Adding Users Signing Up New Users: Part 1 (UIAlertView)

charlie D
charlie D
5,218 Points
Posted by charlie D
charlie D
5,218 Points

yes

Alert views don't appear when I click on "sign up" or "login" without entering login or sign up info. I'm using Xcode 5 - not getting any error messages. Any suggestions?

My code is listed below:

  • (IBAction)signup:(id)sender { NSString *username = [self.usernameField.text stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceAndNewlineCharacterSet]]; NSString *password = [self.passwordField.text stringByTrimmingCharactersInSet: [NSCharacterSet whitespaceAndNewlineCharacterSet]]; NSString *email = [self.emailField.text stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceAndNewlineCharacterSet]];

    if ([username length] == 0 || [password length] == 0 || [email length] == 0) { UIAlertView *alertview = [[UIAlertView alloc] initWithTitle:@"O0ps!" message:@"Make sure you enter a username, password and email address!" delegate:nil cancelButtonTitle:@"Ok" otherButtonTitles:nil];

    [alertview show];

    }

} @end

obey me
obey me
1,135 Points
obey me
obey me
1,135 Points

This is a shorter way to do it,I hope it helps 

             (IBAction)signup:(id)sender
                 { 
                 if ([username.text isEqualToString@""]||[password.text isEqualToString ""]||[email.text isEqualToString""]){

                      UIAlertView *alertview = [[UIAlertView alloc] initWithTitle:@"O0ps!" message:@"Make sure you enter a username, password and email address!" delegate:nil cancelButtonTitle:@"Ok" otherButtonTitles:nil];

                           [alertview show];

                }
              else{

            // do whatever you want there 
             }

1 Answer

Anthony Rouinvy
Anthony Rouinvy
10,495 Points
Anthony Rouinvy
Anthony Rouinvy
10,495 Points

I can't tell you why it doesn't work, but, I took your code, created a new project on XCode 6, iPhone 6 simulator and it does work.