Question

I want to show the “intro” nib i made only at first app launch.

I was using the following code in my viewDidLoad but it seems to do nothing (even in ViewWillAppear). I tried to clean, remove the app from simulator and device and build again but nothing happened.

 NSUserDefaults *defaults = [NSUserDefaults standardUserDefaults];  
    if (![defaults objectForKey:@"firstRun"]){
        IntroViewController *intro = [[IntroViewController alloc] initWithNibName:nil bundle:nil];

        intro.modalTransitionStyle = UIModalTransitionStyleCoverVertical ;
        [self presentModalViewController:intro animated:YES];

        [intro release];

        [defaults setObject:[NSDate date] forKey:@"firstRun"];

    }
    [[NSUserDefaults standardUserDefaults] synchronize];

I also tried to show a little UIAlertView at first launch, and it works! Am i failing to load the nib?

EDIT

I forgot to say it’s a tab Bar based app and i’ve some code in my app delegate to highlight rows at the first three sessions of the app.
Any help appreciated!

Answer 1

Ok, add the following code and it should work:

- (void)Loadview_afterdelay{

    NSUserDefaults *defaults = [NSUserDefaults standardUserDefaults];  
    if (![defaults objectForKey:@"firstRun"]){
    IntroViewController *intro = [[IntroViewController alloc] initWithNibName:nil bundle:nil];

    intro.modalTransitionStyle = UIModalTransitionStyleCoverVertical ;
    [self presentModalViewController:intro animated:YES];

    [intro release];

    [defaults setObject:[NSDate date] forKey:@"firstRun"];

      }

   [[NSUserDefaults standardUserDefaults] synchronize];

}


- (void)viewDidLoad {

[self performSelector:@selector(Loadview_afterdelay) withObject:nil afterDelay:0.5];

 }

Apparently, in this case, you can’t load a second view right after your view is loaded (viewdidload)
Therefor you just set a small delay before loading your second view.