Question

I’m trying to instantiate UiAlertView like this:

UIAlertView *alert = [[UIAlertView alloc] 
                                      initWithTitle:@"Error"
                                      message:@"Incorrect login or password."
                                      delegate:nil
                                      cancelButtonTitle:@"OK"
                                      otherButtonTitles:nil];   

It’s after I get response from server that session expired. App throws me back to login screen then. And then I’m trying to log in with incorrect data, but alert won’t show. Instead it throws something like this:

Thread 0 name:  Dispatch queue: com.apple.main-thread Thread 0 Crashed:
0   libobjc.A.dylib               0x33aa15b0 objc_msgSend + 16
1   UIKit                         0x3a39a370 -[UILabel _setText:] + 92
2   UIKit                         0x3a4e6648 -[UIAlertView
initWithTitle:message:delegate:cancelButtonTitle:otherButtonTitles:] + 64
3   MY APP                       0x00039c7e 0x34000 + 23678
4   MY APP                        0x0005f784 0x34000 + 178052
5   MY APP                       0x000756be 0x34000 + 267966
6   Foundation                    0x347d28e8 __NSThreadPerformPerform + 456
7   CoreFoundation                0x32bbd680
__CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION__ + 12
8   CoreFoundation                0x32bbcee4 __CFRunLoopDoSources0 + 208
9   CoreFoundation                0x32bbbcb2 __CFRunLoopRun + 642
10  CoreFoundation                0x32b2eeb8 CFRunLoopRunSpecific + 352
11  CoreFoundation                0x32b2ed44 CFRunLoopRunInMode + 100
12  GraphicsServices              0x3a92c2e6 GSEventRunModal + 70
13  UIKit                         0x3a3ea2f4 UIApplicationMain + 1116
14  MY APP                       0x0003527e 0x34000 + 4734
15  MY APP                       0x000351dc 0x34000 + 4572   

Is it something with allocating strings created with @ or what?

EDIT:
I’m adding some more code due to request. I don’t think server response function is relevant, since it just executex logOut method. By the way, the whole code I’m posting is placed in AppDelegate

- (void) logout
{
    isLogged = NO;
    currentUser = nil;
    [self createNotLoggedIn];
}

Then create notLoggedIn method creates UIViewController for login form.

-(void) createNotLoggedIn
{

    UIViewController *loginViewController = [[LoginViewController alloc] initWithNibName:@"LoginViewController" bundle:nil];

    //UINavigationControllers are created here... stripped    

    self.tabBarController = [[UITabBarController alloc] init];
    self.tabBarController.delegate = self;
    self.tabBarController.viewControllers = [NSArray arrayWithObjects:navLoginViewController, navGrafikLekarzyViewController, navPlacowkiViewController, navWiecejViewController, nil];

    [self.window addSubview:self.tabBarController.view];

    [self.window makeKeyAndVisible];   
}

logOut and createNotLoggedIn are placed in AppDelegate

Answer 1

I moved the code that is showing AlertDialog to AppDelegate when the ViewController is created and it works