Question

I’m new to programming and I have an app that has a login view on start up and request the user to enter their name which is used throughout out the program. Once they enter their name and log in they are presented with the main menu view. Their name is saved using NSUserdefaults.

The idea is that they will only have to login once (or again if they logout) so they should only see the login view the first time they run the app however once the app is started again it still shows the login screen and also you have to press the login button twice before you are taken to the main menu.

I know that the app is storing the details because it is used thought the app but I cant work out why. Here is my code. If someone could help it would be greatly appreciated.

-(IBAction)LogInButton:(id)sender
{
     NSString *tempStr = [[NSUserDefaults standardUserDefaults] objectForKey:@"UserName"];

     if(tempStr.length==0) 
     {
          NSUserDefaults *prefs = [NSUserDefaults standardUserDefaults];
          [prefs setObject:Name.text forKey:@"UserName"];
          [prefs synchronize];

          LogInView *Logview = [[LogInView alloc] initWithNibName:@"LogInView" bundle:nil];
          [self presentModalViewController:Logview animated:YES];
     }
     else 
     {
          MainMenuView *mainview = [[MainMenuView alloc] initWithNibName:@"MainMenuView"      bundle:nil];
          [self presentModalViewController:mainview animated:YES];
     }
}

Answer 1

It looks like the first time in:

• The login screen shows up
• The user presses login (and this method you’re showing gets called)
• The saved value isn’t initially set, so this evaluates to true: if(tempStr.length==0)
• You save the new value
• You display another login screen

But I don’t think you’re showing all the code. What runs when the app launches?