Shared iAD banner but only on certain views - ios

Question

I have correctly implemented a shared iAd banner in the appDelegate and in certain views(which are adbanner delegates) it appears correctly. How ever in the views where I dont show the banner (so they are not adbanner delegates) when the appdelegate fails to retrieve a Banner since there is no current delegate and no current didFailToRecieveAdWithError method the console shows an error saying that efectively there is no method to recieve the error. Do i need to make the appDelegate also the AdBannerDelegate and put those methods inside?
In appDelegate:
(BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions: (NSDictionary *)launchOptions
{
// Override point for customization after application launch.
_UIiAD = [[ADBannerView alloc]init];
return YES;
}
in ViewController where I want a Banner:
- (CrystalAppDelegate *)appDelegate
{
return (CrystalAppDelegate *)[[UIApplication sharedApplication]delegate];
}
- (void)viewWillAppear:(BOOL)animated
{
_UIiAD = [[self appDelegate] UIiAD];
_UIiAD.delegate = self;
[_UIiAD setFrame:CGRectMake(0, 518, 320, 50)];
[self.view addSubview:_UIiAD];
}
- (void)bannerViewDidLoadAd:(ADBannerView *)banner
{
NSLog(#"Banner did Load");
[UIView beginAnimations:nil context:nil];
[UIView setAnimationDuration:1];
[_UIiAD setAlpha:1];
[UIView commitAnimations];
}
- (void)bannerView:(ADBannerView *)banner didFailToReceiveAdWithError:(NSError *)error
{
NSLog(#"Banner did not Load");
[UIView beginAnimations:nil context:nil];
[UIView setAnimationDuration:1];
[_UIiAD setAlpha:0];
[UIView commitAnimations];
}
-(void)viewWillDisappear:(BOOL)animated
{
_UIiAD.delegate = nil;
_UIiAD = nil;
[_UIiAD removeFromSuperview];
}
Problem is when i am in a view that doesnt have a banner i dont have these methods so when the appDelegate doesnt retrieve a iAdBanner there is no method to revieve the error.