无法实例化名为ADBannerView的类

Question

我正试图在我的应用程序底部插入一个iad横幅，但在完成以下教程后仍然遇到错误。 代码如下。

@interface DMKHomeViewController (UIViewcontroller ) <ADBannerViewDelegate>{

}
@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'而终止应用程序，原因：'无法实例化名为ADBannerView的类' * 首先抛出调用堆栈：

Answer 1

请确保您已添加＆＃34; iAd.framework＆＃34; ...

要执行此操作，请转到＆＃34;应用程序。目标＆＃34;，＆＃34;一般＆＃34;并向下滚动，直到您看到＆＃34;链接的框架和库＆＃34;。命中＆＃34; +＆＃34;并选择iAd框架。请参阅下面的屏幕截图...

Answer 2

您尚未创建AdBannerview的对象..

首先，为横幅视图创建对象并为其设置委托。

-(void)ViewDidLoad
{
   [self createBannerView];
}
- (void)createBannerView {

  Class cls = NSClassFromString(@"ADBannerView");
  if (cls) {
    ADBannerView *adView = [[cls alloc] initWithFrame:CGRectZero];


    // Set the current size based on device orientation
    adView.currentContentSizeIdentifier = ADBannerContentSizeIdentifier320x50;
    adView.delegate = self;

    adView.autoresizingMask = UIViewAutoresizingFlexibleTopMargin |
                              UIViewAutoresizingFlexibleRightMargin;

    // Set initial frame to be offscreen
    CGRect bannerFrame =adView.frame;
    bannerFrame.origin.y = self.view.frame.size.height;
    adView.frame = bannerFrame;

    self.bannerView = adView;
    [self.view addSubview:adView];
    [adView release];
  }
}