我有以下代码将应用内购买添加到应用程序中。一切都在我的设备上完美运行。但是，当我向应用程序添加Crashlytics支持时，我每天都会收到数百份崩溃报告。为什么？我真的无法理解提供的代码有什么问题。
#define kInAppPurchaseManagerProductsFetchedNotification @"kInAppPurchaseManagerProductsFetchedNotification"
#define kInAppPurchaseManagerTransactionFailedNotification @"kInAppPurchaseManagerTransactionFailedNotification"
#define kInAppPurchaseManagerTransactionSucceededNotification @"kInAppPurchaseManagerTransactionSucceededNotification"
#define gFullVersion @"%@.FullVersion"
- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil {
self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
if (self) {
[self loadStore];
}
}
- (NSString*)getProductId:(NSString*)feature {
NSBundle *bundle = [NSBundle mainBundle];
NSDictionary *info = [bundle infoDictionary];
NSString *bundleIdentifier = [info objectForKey: @"CFBundleIdentifier"];
return bundleIdentifier;
}
- (void)requestProducts:(NSString*)feature {
NSSet *productIdentifiers = [NSSet setWithObject:[self getProductId:feature]];
if ([feature isEqualToString:gFullVersion]) {
if (productFullVersionRequest) {
[productFullVersionRequest release];
productFullVersionRequest = nil;
}
productFullVersionRequest = [[SKProductsRequest alloc] initWithProductIdentifiers:productIdentifiers];
productFullVersionRequest.delegate = self;
[productFullVersionRequest start];
// we will release the request object in the delegate callback
}
}
- (void)productsRequest:(SKProductsRequest *)request didReceiveResponse:(SKProductsResponse *)response {
[products addObjectsFromArray:response.products];
for (SKProduct *product in response.products) {
if (product && [product.productIdentifier isEqualToString:[self getProductId:gFullVersion]]) {
// finally release the reqest we alloc/init’ed in requestCompilations
[productFullVersionRequest release];
productFullVersionRequest = nil;
}
}
for (NSString *invalidProductId in response.invalidProductIdentifiers) {
NSLog(@"Invalid product id: %@" , invalidProductId);
}
[[NSNotificationCenter defaultCenter] postNotificationName:kInAppPurchaseManagerProductsFetchedNotification object:self userInfo:nil];
}
// call this method once on startup
- (void)loadStore {
// restarts any purchases if they were interrupted last time the app was open
[[SKPaymentQueue defaultQueue] addTransactionObserver:self];
// get the product description (defined in early sections)
[self requestProducts:gFullVersion];
}
// call this before making a purchase
- (BOOL)canMakePurchases {
return [SKPaymentQueue canMakePayments];
}
// kick off the upgrade transaction
- (void)purchaseProduct:(NSString*)feature {
bool ok = false;
for (SKProduct *product in products) {
if ([product.productIdentifier isEqualToString:[self getProductId:feature]]) {
SKPayment *payment = [SKPayment paymentWithProduct:product];
if (payment) {
[[SKPaymentQueue defaultQueue] addPayment:payment];
break;
}
}
}
}
// saves a record of the transaction by storing the receipt to disk
- (void)recordTransaction:(SKPaymentTransaction *)transaction {
if ([transaction.payment.productIdentifier isEqualToString:[self getProductId:gFullVersion]]) {
// save the transaction receipt to disk
[[NSUserDefaults standardUserDefaults] setValue:transaction.transactionReceipt forKey:[self getProductId:gFullVersion]];
[[NSUserDefaults standardUserDefaults] synchronize];
}
}
// enable pro features
- (bool)provideContent:(NSString *)productId {
if ([productId isEqualToString:[self getProductId:gFullVersion]]) {
// ...provide content here...
return true;
}
return false;
}
// removes the transaction from the queue and posts a notification with the transaction result
- (void)finishTransaction:(SKPaymentTransaction *)transaction wasSuccessful:(BOOL)wasSuccessful {
// remove the transaction from the payment queue.
[[SKPaymentQueue defaultQueue] finishTransaction:transaction];
NSDictionary *userInfo = [NSDictionary dictionaryWithObjectsAndKeys:transaction, @"transaction" , nil];
if (wasSuccessful) {
// send out a notification that we’ve finished the transaction
[[NSNotificationCenter defaultCenter] postNotificationName:kInAppPurchaseManagerTransactionSucceededNotification object:self userInfo:userInfo];
} else {
// send out a notification for the failed transaction
[[NSNotificationCenter defaultCenter] postNotificationName:kInAppPurchaseManagerTransactionFailedNotification object:self userInfo:userInfo];
}
}
// called when the transaction was successful
- (void)completeTransaction:(SKPaymentTransaction *)transaction {
[self recordTransaction:transaction];
bool provided = [self provideContent:transaction.payment.productIdentifier];
[self finishTransaction:transaction wasSuccessful:YES];
}
// called when a transaction has been restored and and successfully completed
- (void)restoreTransaction:(SKPaymentTransaction *)transaction {
[self recordTransaction:transaction.originalTransaction];
[self provideContent:transaction.originalTransaction.payment.productIdentifier];
[self finishTransaction:transaction wasSuccessful:YES];
}
// called when a transaction has failed
- (void)failedTransaction:(SKPaymentTransaction *)transaction {
if (transaction.error.code != SKErrorPaymentCancelled) {
// error!
[self finishTransaction:transaction wasSuccessful:NO];
[self showAlert:NSLocalizedString(@"InAppPurchase", @"") alertStr:[transaction.error localizedDescription]];
} else {
// this is fine, the user just cancelled, so don’t notify
[[SKPaymentQueue defaultQueue] finishTransaction:transaction];
}
}
// called when the transaction status is updated
- (void)paymentQueue:(SKPaymentQueue *)queue updatedTransactions:(NSArray *)transactions {
for (SKPaymentTransaction *transaction in transactions) {
switch (transaction.transactionState) {
case SKPaymentTransactionStatePurchased:
[self completeTransaction:transaction];
break;
case SKPaymentTransactionStateFailed:
[self failedTransaction:transaction];
break;
case SKPaymentTransactionStateRestored:
[self restoreTransaction:transaction];
break;
default:
break;
}
}
}
- (IBAction)processFullVersion:(id)sender {
if ([self canMakePurchases]) {
[self purchaseProduct:gFullVersion];
} else {
[self showAlert:NSLocalizedString(@"InAppPurchase", @"") alertStr:NSLocalizedString(@"CanNotMakePurchases", @"")];
}
}
- (IBAction)restoreCompletedTransactions:(id)sender {
[[SKPaymentQueue defaultQueue] restoreCompletedTransactions];
}
崩溃报告：
Crashed: com.apple.main-thread
EXC_BAD_ACCESS KERN_INVALID_ADDRESS at 0xa1c57ae2
Thread : Crashed: com.apple.main-thread
0 libobjc.A.dylib 0x3bf5e5d0 objc_msgSend + 15
1 StoreKit 0x360260a7 __NotifyObserverAboutChanges + 66
2 CoreFoundation 0x341aeacd CFArrayApplyFunction + 176
3 StoreKit 0x36026055 -[SKPaymentQueue _notifyObserversAboutChanges:sendUpdatedDownloads:] + 128
4 StoreKit 0x36024bc9 -[SKPaymentQueue addPayment:] + 464
5 MyApplication 0x000a76d7 -[CalendarView purchaseProduct:] (CalendarView.m:952)
6 MyApplication 0x000a8c17 -[CalendarView processFullVersion:] (CalendarView.m:1107)
7 MyApplication 0x000a361b -[CalendarView clickHandler:] (CalendarView.m:458)
8 MyApplication 0x000a55cf -[CalendarView liteVersionDisplayAlert] (CalendarView.m:671)
9 MyApplication 0x000a5d2f -[CalendarView toggleView:] (CalendarView.m:735)
10 MyApplication 0x000a625f -[CalendarView modeButtonPressed] (CalendarView.m:795)
11 MyApplication 0x000c245f -[ToolbarView modePressed] (ToolbarView.m:304)
12 UIKit 0x36162087 -[UIApplication sendAction:to:from:forEvent:] + 70
13 UIKit 0x3616203b -[UIApplication sendAction:toTarget:fromSender:forEvent:] + 30
14 UIKit 0x36162015 -[UIControl sendAction:to:forEvent:] + 44
15 UIKit 0x361618cb -[UIControl(Internal) _sendActionsForEvents:withEvent:] + 502
16 UIKit 0x36161db9 -[UIControl touchesEnded:withEvent:] + 488
17 UIKit 0x3608a5f9 -[UIWindow _sendTouchesForEvent:] + 524
18 UIKit 0x360778e1 -[UIApplication sendEvent:] + 380
19 UIKit 0x360771ef _UIApplicationHandleEvent + 6198
20 GraphicsServices 0x37d8f5f7 _PurpleEventCallback + 590
21 GraphicsServices 0x37d8f227 PurpleEventCallback + 34
22 CoreFoundation 0x3423d3e7 __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE1_PERFORM_FUNCTION__ + 34
23 CoreFoundation 0x3423d38b __CFRunLoopDoSource1 + 138
24 CoreFoundation 0x3423c20f __CFRunLoopRun + 1382
25 CoreFoundation 0x341af23d CFRunLoopRunSpecific + 356
26 CoreFoundation 0x341af0c9 CFRunLoopRunInMode + 104
27 GraphicsServices 0x37d8e33b GSEventRunModal + 74
28 UIKit 0x360cb2b9 UIApplicationMain + 1120
29 MyApplication 0x0007daff main (main.m:13)
非常感谢您的帮助！
答案 0 :(得分：11)
您添加到付款队列的观察者似乎已被取消分配。您拨打SKPaymentQueue addTransactionObserver:但未拨打SKPaymentQueue removeTransactionObserver:。
向视图控制器添加dealloc方法：
- (void)dealloc {
[[SKPaymentQueue defaultQueue] removeTransactionObserver:self];
}
很可能你的应用程序显示了一个视图控制器，它将自己添加为观察者。然后该视图控制器被解除（但仍标记为观察者）。稍后您将显示控制器的另一个实例并执行一些支付交易。然后，支付队列尝试通知新老观察者。崩溃的发生是因为旧的观察者早已被解除分配。
通过添加上述dealloc方法，此问题将得到解决。
答案 1 :(得分：-2)
看起来你正在使用键值观察。我猜这个应用程序何时运行此部分
- (void)purchaseProduct:(NSString*)feature {
bool ok = false;
for (SKProduct *product in products) {
if ([product.productIdentifier isEqualToString:[self getProductId:feature]]) {
SKPayment *payment = [SKPayment paymentWithProduct:product];
if (payment) {
[[SKPaymentQueue defaultQueue] addPayment:payment];
break;
}
}
}
}
并成功添加付款以更新不存在的观察者，从而导致内存访问不良。
我会检查[[SKPaymentQueue defaultQueue] addTransactionObserver：self];