iOS DoubleClick for Publishers (DFP) .. Error : No ad to show - ios

Question

I am using DoubleClick for Publishers (DFP) in my App. I have integrated it as per DOCs as follows.
dfpBannerView_ = [[DFPBannerView alloc] initWithAdSize:kGADAdSizeBanner];
dfpBannerView_.adUnitID = kSampleAdUnitID;
// Set the delegate to listen for GADBannerViewDelegate events.
dfpBannerView_.delegate = self;
// Let the runtime know which UIViewController to restore after taking
// the user wherever the ad goes and add it to the view hierarchy.
dfpBannerView_.rootViewController = self;
[self.view addSubview:dfpBannerView_];
// Initiate a generic request to load it with an ad.
[dfpBannerView_ loadRequest:[GADRequest request]];
where kSampleAdUnitID is the App Unit Id I have created.
following Delegate Method is getcalled
- (void)adView:(DFPBannerView *)view
didFailToReceiveAdWithError:(GADRequestError *)error {
NSLog(#"Failed to receive ad with error: %#", [error localizedFailureReason]);
NSLog(#"%d",error.code);
}
But still I gets error as follows,
Failed to receive ad with error: Request Error: No ad to show.
2014-04-11 17:40:55.836 DFPBannerExample[6319:70b] 1
Where error Code 1 stands for /// The ad request was successful, but no ad was returned.
kGADErrorNoFill,
I am not getting where is the problem. Why I am not getting Ads ,while I am getting Ads for Sample App Unit Id .

Answer 1

if you want your banner to display something, you need to specify the banner size, and then tag the banner with the adunit id: check this code:
bannerView_ = [[DFPBannerView alloc] initWithFrame:CGRectMake(111, 483, 537, 120)];
bannerView_.adUnitID = #"/5900406/UserAppWaitingView";
// the user wherever the ad goes and add it to the view hierarchy.
bannerView_.rootViewController = self;
[self.view addSubview:bannerView_];
// Initiate a generic request to load it with an ad.
[bannerView_ loadRequest:[GADRequest request]];