这就是我所说的:
/**
* 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;
}
}];
}
但是,该块永远不会被调用,因此表格视图单元格永远不会被重新加载。我可以说该块永远不会执行,因为日志永远不会出现在控制台中。但是,通过放置断点,我已经能够确定 productPurchased: 方法肯定被调用了。
任何帮助表示赞赏。
谢谢你。
编辑:我现在更改了上面的代码,以允许在整个执行过程中进行更多的日志记录。从我通过查看控制台收集到的信息来看,传入的通知对象是表格视图本身:
<UITableView: 0x1eaffe00; frame = (0 0; 320 704); clipsToBounds = YES; autoresize = W+H; gestureRecognizers = <NSArray: 0x1e57dfe0>; layer = <CALayer: 0x1e57da50>; contentOffset: {0, 0}>
这显然是调用此函数的问题,因此我将进一步调查,并在获得答案后立即发布我的答案。
现在我将介绍如何调用这个函数:
签署通知:
/**
* 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];
}