iAd 横幅错误“iAd 实例过多”答案

【问题标题】：iAd Banner Error "Too many instances of iAd"iAd 横幅错误“iAd 实例过多”
【发布时间】：2014-07-12 05:57:27
【问题描述】：

我的一个视图控制器上有一个广告横幅视图，用作我的游戏的说明页面。当多次加载该视图控制器时，我收到以下错误。

WARNING: More than 10 instances of ADBannerView or ADInterstitialView currently exist. This is a misuse of the iAd API, and ad performance will suffer as a result. This message is printed only once.

我在 stackoverflow 上搜索了这个错误，阅读了回复，但对我没有任何帮助。我已经读到您打算发布广告横幅，然后将其归零等。我有并且仍然收到此错误。我的“viewWillAppear”和“viewWillDissapear”的代码如下。任何帮助将不胜感激！

-(void) viewWillAppear:(BOOL)animated {

[super viewWillAppear:animated];

_adBanner = [[ADBannerView alloc] initWithFrame:CGRectMake(0, self.view.frame.size.height, 320, 50)];
_adBanner.delegate = self;
[self.view addSubview:_adBanner];

}

-(void) viewWillDisappear:(BOOL)animated {

[super viewWillDisappear:animated];

if (_adBanner != nil) {
    _adBanner.delegate = nil;
    _adBanner.hidden = YES;
    [_adBanner release];
    _adBanner = nil;

}

}

【问题讨论】：

标签： ios7 xcode5 iad

【解决方案1】：

在将 iAd 设置为 nil 之前，尝试从其超级视图中移除 iAd：

-(void) viewWillDisappear:(BOOL)animated {
    [super viewWillDisappear:animated];

    if (_adBanner != nil) {
        [_adBanner removeFromSuperview]; // <-new line

        _adBanner.delegate = nil;
        _adBanner.hidden = YES;
        [_adBanner release];
        _adBanner = nil;
}

【讨论】：

嗨，我刚刚尝试使用此代码，但出现了同样的错误。
@user3752308 太可惜了，从超级视图中删除它是解决它的常用方法。您对viewWillAppear 和viewWillDisappear 的调用次数是否大致相同？
不知道如何检查，我只是对这个错误感到很困惑......所有其他有问题的人似乎都可以接受通常的诊断。

【解决方案2】：

这里是 iAd 的代码，我已经在我的应用程序中使用，没有任何问题：

implementation ViewController
{
    ADBannerView *adView;
    BOOL bannerIsVisible;
}

- (void)viewDidLoad
{
    [super viewDidLoad];


    adView = [[ADBannerView alloc] initWithFrame:CGRectZero];
    adView.frame = CGRectOffset(adView.frame, 0, -50);
    adView.requiredContentSizeIdentifiers = [NSSet setWithObject:ADBannerContentSizeIdentifier320x50];
    adView.currentContentSizeIdentifier = ADBannerContentSizeIdentifier320x50;
    [self.view addSubview:adView];
    adView.delegate=self;
    bannerIsVisible=NO;
}

- (void)bannerViewDidLoadAd:(ADBannerView *)banner
{
    if (!bannerIsVisible)
    {
        [UIView beginAnimations:@"animateAdBannerOn" context:NULL];
        // banner is invisible now and moved out of the screen on 50 px
        banner.frame = CGRectOffset(banner.frame, 0, 50);
        [UIView commitAnimations];
        bannerIsVisible = YES;
    }
}

- (void)bannerView:(ADBannerView *)banner didFailToReceiveAdWithError:(NSError *)error
{
    if (bannerIsVisible)
    {
        [UIView beginAnimations:@"animateAdBannerOff" context:NULL];
        // banner is visible and we move it out of the screen, due to connection issue
        banner.frame = CGRectOffset(banner.frame, 0, -50);
        [UIView commitAnimations];
        bannerIsVisible = NO;
    }
}

【讨论】：

【解决方案3】：

不要在单个类中初始化adBannerView，而是在AppDelegate 中创建它。

我说：

@property (strong, nonatomic) ADBannerView *adBanner;

在我的AppDelegate.h 和：

self.adBanner = [[ADBannerView alloc] init];

在我的AppDelegate.m

然后在我放的单个班级中：

@property (strong, nonatomic) ADBannerView *adBanner;

在 .h 和 .m 中我放了：

{
    BOOL _bannerIsVisible;
}

在@interface 的正下方和@implementation 中我放了：

#pragma mark Ads




- (WTMAppDelegate *) appdelegate {
    return (WTMAppDelegate *)[[UIApplication sharedApplication] delegate];
}

- (void)bannerViewDidLoadAd:(ADBannerView *)banner
{
    NSLog(@"Retreieved Ad");
    [self bringBannerBack];

}

- (void)bannerView:(ADBannerView *)banner didFailToReceiveAdWithError:(NSError *)error
{
    NSLog(@"Failed to retrieve ad");

    [self moveBannerViewOffScreen];
}

- (void)bringBannerBack
{



    [self.adBanner setAlpha:1];
    [self.adBanner setNeedsDisplay];
    [UIView beginAnimations:@"MoveView" context:nil];
    [UIView setAnimationCurve:UIViewAnimationCurveEaseIn];
    [UIView setAnimationDuration:0.1];
    self.adBanner.frame = CGRectMake(0, self.view.bounds.size.height - 50, 320, 50);
    [UIView commitAnimations];
    _bannerIsVisible = YES;
    [self.adBanner setAlpha:1];

}
//Move the banner off the screen.
- (void)moveBannerViewOffScreen
{

    [self.adBanner setAlpha:0];
    [self.adBanner setNeedsDisplay];
    _bannerIsVisible = NO;

}

在 viewWillAppear 和 ViewWillDisappear 中：

- (void) viewWillDisappear:(BOOL)animated{


    self.adBanner.delegate=nil;
    self.adBanner=nil;
    [self.adBanner removeFromSuperview];


}


- (void) viewWillAppear:(BOOL)animated
{
    self.adBanner = [[self appdelegate] adBanner];
    self.adBanner.delegate = self;
    [self.view addSubview:self.adBanner];

    if (self.adBanner.bannerLoaded == NO){
        NSLog(@"NO initial banner loaded");
        [self moveBannerViewOffScreen];
    } else {
        NSLog(@"Initial ad loaded");
        [self bringBannerBack];
    }

}

【讨论】：