无法实例化名为ADBannerView的类

我试图在我的应用程序的底部插入一个iad横幅,但在遵循教程后不断收到错误.代码如下.

@interface DMKHomeViewController (UIViewcontroller ) {

}
@end

@implementation DMKHomeViewController

- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
{
self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
if (self) {
    // Custom initialization
}
return self;
}

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

[UIView beginAnimations:nil context:NULL];

[UIView setAnimationDuration:1];

[banner setAlpha:1];

[UIView commitAnimations];

}



- (void)bannerView:(ADBannerView *)

banner didFailToReceiveAdWithError:(NSError *)error

{

[UIView beginAnimations:nil context:NULL];

[UIView setAnimationDuration:1];

[banner setAlpha:0];

[UIView commitAnimations];

}

我一直收到以下错误 *由于未捕获的异常'NSInvalidUnarchiveOperationException'终止应用程序,原因:'无法实例化名为ADBannerView的类'*首先抛出调用堆栈: