Glad to hear that you are already developing apps at 14. Way to go man. Here is the link to apple's iad sample code. Download it and take a look at the methods. It has 3 or 4 different ways to implement the iad and has the method to respond when there is no iad download. Hope it helps and keep up the good work.
http://developer.apple.com/library/ios/ipad/#samplecode/iAdSuite/Introduction/Intro.html
gere is the code that hides the banner if there is no ad:
- (void)bannerView:(ADBannerView *)banner didFailToReceiveAdWithError:(NSError *)error
{
if (self.bannerIsVisible)
{
[UIView beginAnimations:@"animateAdBannerOff" context:NULL];
// Assumes the banner view is placed at the bottom of the screen.
banner.frame = CGRectOffset(banner.frame, 0, banner.frame.size.height);
[UIView commitAnimations];
self.bannerIsVisible = NO;
}
}
this is directly from the sample codes which i have given you the link in above paragraph. hope you find it useful my young programmer friend.