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这里就是我称之为:enumerateObjectsUsingBlock:未执行
/**
* called when we are notified that a product has been purchased
*
* @param notification the notification object calling this method
*/
- (void)productPurchased:(NSNotification *)notification
{
// the notification object is purchased product identifier
NSString *productIdentifier = notification.object;
NSLog(@"Product purchased");
// reload appropriate cell with checkmark
[_products enumerateObjectsUsingBlock:^(SKProduct *product, NSUInteger idx, BOOL *stop)
{
NSLog(@"Block executing with product: %@", product.productIdentifier);
NSLog(@"Needs to match: %@", productIdentifier);
if ([product.productIdentifier isEqualToString:productIdentifier])
{
[self.tableView reloadRowsAtIndexPaths:@[[NSIndexPath indexPathForRow:idx inSection:0]]
withRowAnimation:UITableViewRowAnimationFade];
NSLog(@"Reloading due to purchase");
*stop = YES;
}
}];
}
然而,该块永远不会被调用,因此表格视图单元格是永远不会被重新加载。我可以告诉块永远不会执行,因为日志永远不会显示在控制台中。但是,通过放置一个断点,我可以确定productPurchased:方法肯定会被调用。
任何帮助表示赞赏。
谢谢。
编辑:我现在已经改变了上面的代码,以允许在执行过程中有更多的日志记录。从我已经能够通过查看控制台收集,在传递的通知对象是表视图本身:
<UITableView: 0x1eaffe00; frame = (0 0; 320 704); clipsToBounds = YES; autoresize = W+H; gestureRecognizers = <NSArray: 0x1e57dfe0>; layer = <CALayer: 0x1e57da50>; contentOffset: {0, 0}>
这显然是具有这种功能的话的问题,所以我会调查更进一步,并尽快发布我的答案。
现在我将包括如何这个功能应该被称为:
签约通知:
/**
* notifies the view controller that its view is about to be added to a view hierarchy
*
* @param animated whether it will be added in an animated fashion
*/
- (void)viewWillAppear:(BOOL)animated
{
// add ourselves as an observer to product purchases
[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(productPurchased:) name:IAHelperProductPurchasedNotification object:nil];
}
发送通知:
/**
* handles all the extra work not that a product has been purchased
*
* @param productIdentifier the purchased product's identifier
*/
- (void)provideContentForProductIdentifier:(NSString *)productIdentifier
{
// adds the product's id to our purchased product ids list
[_purchasedProductIdentifiers addObject:productIdentifier];
// stores this purchase in nsuserdefaults for long term use
[[NSUserDefaults standardUserDefaults] setBool:YES forKey:productIdentifier];
// save the user defaults
[[NSUserDefaults standardUserDefaults] synchronize];
// send notification to tohers for awareness of this purchase
[[NSNotificationCenter defaultCenter] postNotificationName:IAHelperProductPurchasedNotification object:productIdentifier userInfo:nil];
}
您是否检查_products是否为空或空? – Eiko
你是否在块内部放置了'NSLog'语句,但是在'if'语句之外。 – mttrb
这似乎是一个higg错误的儿子。做一个测试,并尝试在方法调用开始时获得nslog的输出。如果你没有得到它,那么Xcode编译你的应用程序,但不要安装它,你会得到你旧版本的旧版痕迹,而gdb会工作,但我只是猜测。 –