使用UITableViews在app上使用ADBannerView的共享实例(using shared instance of ADBannerView across app with UITableViews)

 我有一个带有多个UITableViews的应用程序，我正在实现iADs。 根据Apple文档（ http://developer.apple.com/library/ios/#technotes/tn2286/_index.html#//apple_ref/doc/uid/DTS40011212 ）我创建了一个属于我的app delegate的共享横幅并且应用程序委托也是横幅的委托。 这很有效，广告在加载横幅和用户切换屏幕后很好地显示在各种视图控制器上。 
 
 问题是在第一个viewController上没有看到广告，因为视图控制器的viweWillAppear方法（我称之为“fixUpAdView”方法）在加载横幅之前出现。 
 
 我想我得到的部分是这个（来自苹果文档）：“让你的应用程序代理告诉当前的视图控制器它是否应该显示或隐藏横幅。你可以使用UINavigationControllerDelegate或UITabBarControllerDelegate协议推送横幅来显示它。” 我知道我需要在bannerViewDidLoadAd和failToReceive方法中添加一些内容，但是对于如何执行此操作我感到有点困惑。 
 
 我不希望广告在我的所有视图控制器上显示（只有其中的6个），并且我在应用程序中也有多个模态视图（其中任何一个都没有广告）。 
 
 以下是我的一些代码：在我的appDelegate中： 
 
- (void)bannerViewDidLoadAd:(ADBannerView *)banner {
    NSLog(@"bannerViewDidLoadAD");
    if (!_adBannerViewIsVisible) 
        _adBannerViewIsVisible = YES;

}


- (void)bannerView:(ADBannerView *)banner didFailToReceiveAdWithError:(NSError *)error
{

    NSLog(@"BannerAd didfailtoreceive");
    if (_adBannerViewIsVisible)
        _adBannerViewIsVisible = NO;

}

- (ADBannerView *)sharedAdBannerView 
{
    if (_sharedAdBannerView == nil) {

        Class classAdBannerView = NSClassFromString(@"ADBannerView");

        if (classAdBannerView != nil) {
            _sharedAdBannerView = [[classAdBannerView alloc] initWithFrame:CGRectZero];
            [_sharedAdBannerView setRequiredContentSizeIdentifiers:[NSSet setWithObjects: 
                                                              ADBannerContentSizeIdentifier320x50, 
                                                              ADBannerContentSizeIdentifier480x32, nil]];
            [_sharedAdBannerView setCurrentContentSizeIdentifier:ADBannerContentSizeIdentifier320x50];            
            [_sharedAdBannerView setFrame:CGRectOffset([_sharedAdBannerView frame], 0, 
                                                 -(iAD_BANNER_HEIGHT))];
            [_sharedAdBannerView setDelegate:self];
        }
    }

    return _sharedAdBannerView;
}
 
 在我的视图控制器中： 
 
- (void)viewWillAppear:(BOOL)animated {

    if ([[AppDelegate ad] shouldShowAds]) {

        if (!self.contentView) {
            self.contentView = [[UIView alloc] initWithFrame:[[self view] bounds]];
            [self.view addSubview:_contentView];
        }
        [self.contentView addSubview:topView];
        [self fixupAdView];
        [self.view addSubview:[[AppDelegate ad] sharedAdBannerView]];
    }
    [super viewWillAppear:NO];
}


#pragma mark
#pragma mark iADS

- (void)fixupAdView {

    if ([[AppDelegate ad] sharedAdBannerView] != nil) {        

        [[[AppDelegate ad] sharedAdBannerView] setCurrentContentSizeIdentifier:ADBannerContentSizeIdentifier320x50];
        [UIView beginAnimations:@"fixupViews" context:nil];

        if ([[AppDelegate ad] adBannerViewIsVisible]) {
            CGRect adBannerViewFrame = [[[AppDelegate ad] sharedAdBannerView] frame];
            adBannerViewFrame.origin.x = 0;
            adBannerViewFrame.origin.y = 0;
            [[[AppDelegate ad] sharedAdBannerView] setFrame:adBannerViewFrame];
            CGRect contentViewFrame = _contentView.frame;
            contentViewFrame.origin.y = iAD_BANNER_HEIGHT;
            contentViewFrame.size.height = self.view.frame.size.height - 
            iAD_BANNER_HEIGHT;
            _contentView.frame = contentViewFrame;
        } 
        else {
            CGRect adBannerViewFrame = [[[AppDelegate ad] sharedAdBannerView] frame];
            adBannerViewFrame.origin.x = 0;
            adBannerViewFrame.origin.y = -(iAD_BANNER_HEIGHT);
            [[[AppDelegate ad] sharedAdBannerView] setFrame:adBannerViewFrame];
            CGRect contentViewFrame = _contentView.frame;
            contentViewFrame.origin.y = 0;
            contentViewFrame.size.height = self.view.frame.size.height;
            _contentView.frame = contentViewFrame;            
        }
        [UIView commitAnimations];
    }   
}

I have an app with multiple UITableViews and am in the process of implementing iADs. Per the Apple documentation (http://developer.apple.com/library/ios/#technotes/tn2286/_index.html#//apple_ref/doc/uid/DTS40011212) I have created a shared banner that belongs to my app delegate and the application delegate is also the banner's delegate. This works well and the ads show nicely across the various view controllers AFTER the banner is loaded and the user switches screens.
 
The problem is that there is no ad seen on the first viewController that comes up because the viweWillAppear method of the view controller (where I am calling my "fixUpAdView" method) comes before the banner is loaded. 
 
I guess the part that I am not getting is this (from the apple documentation): "Have your application delegate tell the current view controller if it should show or hide the banner. You can use UINavigationControllerDelegate or UITabBarControllerDelegate protocol to push the banner to show it." I understand that I need to be putting something into my bannerViewDidLoadAd and failToReceive methods but am a bit confused as to how to do this.
 
I do not want the ad to show on all of my view controllers (just 6 of them) and I also have several modal views in the app (no ad on any of these).
 
Here is some of my code: In my appDelegate:
 
- (void)bannerViewDidLoadAd:(ADBannerView *)banner {
    NSLog(@"bannerViewDidLoadAD");
    if (!_adBannerViewIsVisible) 
        _adBannerViewIsVisible = YES;

}


- (void)bannerView:(ADBannerView *)banner didFailToReceiveAdWithError:(NSError *)error
{

    NSLog(@"BannerAd didfailtoreceive");
    if (_adBannerViewIsVisible)
        _adBannerViewIsVisible = NO;

}

- (ADBannerView *)sharedAdBannerView 
{
    if (_sharedAdBannerView == nil) {

        Class classAdBannerView = NSClassFromString(@"ADBannerView");

        if (classAdBannerView != nil) {
            _sharedAdBannerView = [[classAdBannerView alloc] initWithFrame:CGRectZero];
            [_sharedAdBannerView setRequiredContentSizeIdentifiers:[NSSet setWithObjects: 
                                                              ADBannerContentSizeIdentifier320x50, 
                                                              ADBannerContentSizeIdentifier480x32, nil]];
            [_sharedAdBannerView setCurrentContentSizeIdentifier:ADBannerContentSizeIdentifier320x50];            
            [_sharedAdBannerView setFrame:CGRectOffset([_sharedAdBannerView frame], 0, 
                                                 -(iAD_BANNER_HEIGHT))];
            [_sharedAdBannerView setDelegate:self];
        }
    }

    return _sharedAdBannerView;
}
 
In my view controller:
 
- (void)viewWillAppear:(BOOL)animated {

    if ([[AppDelegate ad] shouldShowAds]) {

        if (!self.contentView) {
            self.contentView = [[UIView alloc] initWithFrame:[[self view] bounds]];
            [self.view addSubview:_contentView];
        }
        [self.contentView addSubview:topView];
        [self fixupAdView];
        [self.view addSubview:[[AppDelegate ad] sharedAdBannerView]];
    }
    [super viewWillAppear:NO];
}


#pragma mark
#pragma mark iADS

- (void)fixupAdView {

    if ([[AppDelegate ad] sharedAdBannerView] != nil) {        

        [[[AppDelegate ad] sharedAdBannerView] setCurrentContentSizeIdentifier:ADBannerContentSizeIdentifier320x50];
        [UIView beginAnimations:@"fixupViews" context:nil];

        if ([[AppDelegate ad] adBannerViewIsVisible]) {
            CGRect adBannerViewFrame = [[[AppDelegate ad] sharedAdBannerView] frame];
            adBannerViewFrame.origin.x = 0;
            adBannerViewFrame.origin.y = 0;
            [[[AppDelegate ad] sharedAdBannerView] setFrame:adBannerViewFrame];
            CGRect contentViewFrame = _contentView.frame;
            contentViewFrame.origin.y = iAD_BANNER_HEIGHT;
            contentViewFrame.size.height = self.view.frame.size.height - 
            iAD_BANNER_HEIGHT;
            _contentView.frame = contentViewFrame;
        } 
        else {
            CGRect adBannerViewFrame = [[[AppDelegate ad] sharedAdBannerView] frame];
            adBannerViewFrame.origin.x = 0;
            adBannerViewFrame.origin.y = -(iAD_BANNER_HEIGHT);
            [[[AppDelegate ad] sharedAdBannerView] setFrame:adBannerViewFrame];
            CGRect contentViewFrame = _contentView.frame;
            contentViewFrame.origin.y = 0;
            contentViewFrame.size.height = self.view.frame.size.height;
            _contentView.frame = contentViewFrame;            
        }
        [UIView commitAnimations];
    }   
}

原文：https://stackoverflow.com/questions/10433565