Question

我成功实施了应用内购买，以便在我的应用中删除广告。它是我第一次尝试它，但在我在手机上运行应用程序几次之后，它开始只是显示一个白色广告横幅，而不是像过去那样隐藏广告横幅。

以下是我的应用程序StartScreen.m的代码以及购买IAP以删除广告的PurchaseViewController.m。我还得到一个警告，说我正在使用10个ADBanner实例，即使我在视图消失时删除了它们。感谢您的帮助。

//
//StartScreen.m
//

@interface StartScreen ()
{
    BOOL _bannerIsVisible;
}
@end

@implementation StartScreen

- (void)viewDidLoad {


//Ads
    self.adBanner.delegate = self;

}

- (void)viewWillDisappear:(BOOL)animated
{
    [self.adBanner removeFromSuperview];
    self.adBanner.delegate = nil;
    self.adBanner = nil;
}

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

    // Check for Remove Ads IAP

    NSUserDefaults *prefs = [NSUserDefaults standardUserDefaults];

    if ([prefs boolForKey:@"RemoveAds"] == TRUE) {
        self.adBanner.hidden = YES;
        _bannerIsVisible = NO;
    } else if (!_bannerIsVisible)
    {
        self.adBanner.hidden = NO;
        _bannerIsVisible = YES;
    }
}

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

    // Check for Remove Ads IAP

    NSUserDefaults *prefs = [NSUserDefaults standardUserDefaults];

    if ([prefs boolForKey:@"RemoveAds"] == TRUE) {
        self.adBanner.hidden = YES;
        _bannerIsVisible = NO;
    }
}

//
//  PurcahseViewController.m
//

#import "PurcahseViewController.h"

@implementation PurcahseViewController

- (void)viewDidLoad
{
    [super viewDidLoad];

    self.productID = @"com.app.iap1";
    [self getProductID:self];

    self.buyButton.enabled = NO;
    NSLog(@"%@", self.productID);
}

- (void)getProductID:(UIViewController *)viewController {
    if ([SKPaymentQueue canMakePayments]) {
        SKProductsRequest *request = [[SKProductsRequest alloc] initWithProductIdentifiers:[NSSet setWithObject:self.productID]];
        request.delegate = self;

        [request start];
    } else {
        self.productDescription.text = @"Please enable in app purchase in your settings";
    }
}

- (IBAction)purchaseItem:(id)sender {
    SKPayment *payment = [SKPayment paymentWithProduct:self.product];
    [[SKPaymentQueue defaultQueue] addPayment:payment];
}

- (IBAction)restoreButton:(id)sender {
    [[SKPaymentQueue defaultQueue] addTransactionObserver:self];
    [[SKPaymentQueue defaultQueue] restoreCompletedTransactions];
}

-(void)paymentQueueRestoreCompletedTransactionsFinished:(SKPaymentQueue *)queue {
    [self UnlockPurchase];
}

- (void)Purchased {
    NSLog(@"Item has been purchased");
}

#pragma mark _
#pragma mark SKProductsRequestDelegate

-(void)productsRequest:(SKProductsRequest *)request didReceiveResponse:(SKProductsResponse *)response {

    NSArray *products = response.products;

    if (products.count != 0) {
        self.product = products[0];
        self.buyButton.enabled = YES;
        self.productTitle.text = self.product.localizedTitle;
        self.productDescription.text = self.product.localizedDescription;
    } else {
        self.productTitle.text = @"404: Product Not Found";
    }

    products = response.invalidProductIdentifiers;

    for (SKProduct *product in products) {
        NSLog(@"404: Product Not Found: %@", product);
    }
}

-(void)paymentQueue:(SKPaymentQueue *)queue updatedTransactions:(NSArray *)transactions {

    for (SKPaymentTransaction *transaction in transactions) {
        switch (transaction.transactionState) {
            case SKPaymentTransactionStatePurchased: [self UnlockPurchase];
                [[SKPaymentQueue defaultQueue] finishTransaction:transaction];
                break;

            case SKPaymentTransactionStateFailed:NSLog(@"Transaction Failed");
                [[SKPaymentQueue defaultQueue] finishTransaction:transaction];
                default:
                break;

        }
    }
}

-(void)UnlockPurchase {
    self.buyButton.enabled = NO;
    [self.buyButton setTitle:@"Purchased" forState:UIControlStateDisabled];
    NSUserDefaults *prefs = [NSUserDefaults standardUserDefaults];
    [prefs setBool:TRUE forKey:@"RemoveAds"];
    [prefs synchronize];
    [self Purchased];
}

Answer 1

首先，要回答您的问题，您的广告在广告失败时隐藏的原因是因为您没有隐藏它。无论是否[prefs boolForKey:@"RemoveAds"] == TRUE，如果您不想在其位置使用空白条，您就会想要隐藏该横幅。要以最简单的方式（没有任何动画）这样做，请简化didFailToReceiveAdWithError:方法，如下所示：

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

    // Check for Remove Ads IAP
    self.adBanner.hidden = YES;
    _bannerIsVisible = NO;
}

并将其隐藏在viewDidLoad中，以便在广告加载之前隐藏起来：

- (void)viewDidLoad {

    //Ads
    self.adBanner.delegate = self;
    self.adBanner.hidden = YES;
}

这样，只有在广告成功加载后，您的广告才会在bannerViewDidLoadAd:中取消隐藏。

其次，您的_bannerIsVisible布尔值是不必要的。您可以使用if (self.adBanner.hidden == YES)或if (self.adBanner.hidden == NO)或if (self.adBanner.hidden)或if (!self.adBanner.hidden)来检查它是否隐藏，而不是使用单独的布尔值来检查横幅是否可见。消除不必要的布尔值将减少潜在的错误。

所以，总而言之，我的建议是关于bannerViewDidLoadAd:和didFailToReceiveAdWithError:方法的外观：

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

    // Check for Remove Ads IAP
    NSUserDefaults *prefs = [NSUserDefaults standardUserDefaults];

    if ([prefs boolForKey:@"RemoveAds"] == TRUE) {
        self.adBanner.hidden = YES;
    } else if (self.adBanner.hidden) {
        self.adBanner.hidden = NO;
    }
}

- (void)bannerView:(ADBannerView *)banner didFailToReceiveAdWithError:(NSError *)error
{
    NSLog(@"Failed to retreive ad");
    self.adBanner.hidden = YES;
}

iAd显示白色横幅

1 个答案: