Why isn't UIAlertView Showing?

Question

For some reason screen gets dark and freezes, alert is not shown... can someone please help?

Thanks in advance!

} else {
    UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"Hello!" 
                                                message:@"Hello!" delegate:self 
                                      cancelButtonTitle:@"Done" 
                                      otherButtonTitles:nil];
    [alert show];
    [alert release];
}

Answer 1

You are probably calling show from a background thread, call it on the main thread like this:

UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"Hello!" 
                                            message:@"Hello!" delegate:self 
                                            cancelButtonTitle:@"Done" 
                                            otherButtonTitles:nil];
[alert performSelectorOnMainThread:@selector(show)
                            withObject:nil
                            waitUntilDone:NO];
[alert release];