得到ADBannerView錯誤消息

Question

我創造我的iPhone應用程序編程ADBannerView，

有誰能夠說我說，

爲什麼我geeting在我的控制檯此消息，

ADBannerView: Unhandled error (no delegate or delegate does not implement didFailToReceiveAdWithError:): Error Domain=ADErrorDomain Code=3 "The operation couldn’t be completed. Ad inventory unavailable" UserInfo=0xb5328d0 {ADInternalErrorCode=3, NSLocalizedFailureReason=Ad inventory unavailable}

Answer 1

in .h file 
#import <iAd/iAd.h> 
@interface YOUR_FILE : UIViewController <ADBannerViewDelegate>{ 

ADBannerView *adView; 
} 

@property(nonatomic,retain)IBOutlet ADBannerView *adView; 

@end; 

i ñ.m文件

-(void)viewDidLoad { 

... 
... 
... 
... 
    adView.delegate =self; 
    } 

-(void) bannerView:(ADBannerView *)banner didFailToReceiveAdWithError:(NSError *)error 
{ 
    NSLog(@"iAdBanner failed"); 


} 
-(void) bannerViewDidLoadAd:(ADBannerView *)banner 
{ 

    NSLog(@"iAdBanner loaded"); 



}