iAd - not working properly - iphone

Question

I'm adding iAd on my app.... I managed to have the banner sliding from the bottom (just above my tab bar, 0, 410 i guess)... but only when i launch the app the first time. when then i try to switch the wifi off on my testing device to check if i get the blank banner i get the following message:ADBannerView: WARNING A banner view (0x1b11d0) has an ad but may be obscured. This message is only printed once per banner view. Can please somebody help me??
-(void)bannerViewDidLoadAd:(ADBannerView *)banner{
if (!self.bannerIsVisible) {
[UIView beginAnimations:#"animatedAdBannerOn" context:NULL];
NSLog(#"there are ads to show");
banner.frame = CGRectOffset(banner.frame, 0, -50);
[UIView commitAnimations];
self.bannerIsVisible = YES;
}
}
//----hide banner if can't load ad.
-(void)bannerView:(ADBannerView *)banner didFailToReceiveAdWithError:(NSError *)error{
if (!self.bannerIsVisible) {
[UIView beginAnimations:#"animatedAdBannerOff" context:NULL];
NSLog(#"sorry, no ads ");
banner.frame = CGRectOffset(banner.frame, 0, 410);
[UIView commitAnimations];
self.bannerIsVisible = NO;
}
}
- (void)viewDidLoad {
[super viewDidLoad];
aBanner = [[ADBannerView alloc]initWithFrame:CGRectZero];
aBanner.frame = CGRectOffset(aBanner.frame, 0, 410);
aBanner.requiredContentSizeIdentifiers = [NSSet setWithObject:ADBannerContentSizeIdentifierPortrait];
aBanner.currentContentSizeIdentifier = ADBannerContentSizeIdentifierPortrait;
[self.view addSubview:aBanner];
aBanner.delegate=self;
self.bannerIsVisible=NO;
[super viewDidLoad];
I know something is wrong in the CGRectOffset but I'm not able to figure it out.
thanks

Answer 1

FIND THE PROBLEM.... WAS JUST A SIMPLE "!" HERE THE CODE FIXED:
-(void)bannerViewDidLoadAd:(ADBannerView *)banner{
if (!self.bannerIsVisible) {
[UIView beginAnimations:#"animatedAdBannerOn" context:NULL];
NSLog(#"there are ads to show");
banner.frame = CGRectOffset(banner.frame,0, -banner.frame.size.height);
[UIView commitAnimations];
self.bannerIsVisible = YES;
}
}
//----hide banner if can't load ad.
-(void)bannerView:(ADBannerView *)banner didFailToReceiveAdWithError:(NSError *)error{
if (self.bannerIsVisible) { //THE PROBLEM WAS HERE!!!!
[UIView beginAnimations:#"animatedAdBannerOff" context:NULL];
NSLog(#"sorry, no ads ");
banner.frame = CGRectOffset(banner.frame, 0, banner.frame.size.height);
[UIView commitAnimations];
self.bannerIsVisible = NO;
}
}
- (void)viewDidLoad {
[super viewDidLoad];
aBanner = [[ADBannerView alloc]initWithFrame:CGRectZero];
aBanner.frame = CGRectOffset(aBanner.frame, 0, 410);
aBanner.requiredContentSizeIdentifiers = [NSSet setWithObject:ADBannerContentSizeIdentifierPortrait];
aBanner.currentContentSizeIdentifier = ADBannerContentSizeIdentifierPortrait;
[self.view addSubview:aBanner];
aBanner.delegate=self;
self.bannerIsVisible=NO;
[super viewDidLoad];