Question

我正在尝试将Beeblex的新应用内购买验证添加到我的应用中，但是我很难在块内传递返回值。

这是我现在的代码，你可以看到我设置了一个BOOL值，然后在验证块中设置BOOL并在结束时返回它。然而，在块结束之前调用最后的返回，所以我需要从块内返回BOOL？

- (BOOL)verifyTransaction:(SKPaymentTransaction *)transaction
{
    if (![BBXIAPTransaction canValidateTransactions]) {
        return YES; // There is no connectivity to reach the server
    }

    BOOL __block toReturn = YES;
    BBXIAPTransaction *bbxTransaction = [[BBXIAPTransaction alloc] initWithTransaction:transaction];
    bbxTransaction.useSandbox = YES;
    [bbxTransaction validateWithCompletionBlock:^(NSError *error) {
        if (bbxTransaction.transactionVerified) {
            if (bbxTransaction.transactionIsDuplicate) {
                // The transaction is valid, but duplicate - it has already been sent to Beeblex in the past.
                NSLog(@"Transaction is a duplicate!");
                [FlurryAnalytics logEvent:@"Transaction duplicate!"];
                toReturn = NO;
            } else {
                // The transaction has been successfully validated and is unique
                NSLog(@"Transaction valid data:%@",bbxTransaction.validatedTransactionData);
                [FlurryAnalytics logEvent:@"Transaction verified"];
                toReturn = YES;
            }
        } else {
            // Check whether this is a validation error, or if something went wrong with Beeblex
            if (bbxTransaction.hasConfigurationError || bbxTransaction.hasServerError || bbxTransaction.hasClientError) {
                // The error was not caused by a problem with the data, but is most likely due to some transient networking issues
                NSLog(@"Transaction error caused by network, not data");
                [FlurryAnalytics logEvent:@"Transaction network error"];
                toReturn = YES;
            } else {
                // The transaction supplied to the validation service was not valid according to Apple
                NSLog(@"Transaction not valid according to Apple");
                [FlurryAnalytics logEvent:@"Transaction invalid!!"];
                toReturn = NO;
            }
        }
    }];

    NSLog(@"toReturn: %@",toReturn ? @"Yes" : @"No");
    return toReturn;
}

如果我只是将return = NO;放在块中，我会得到不兼容块指针类型的编译器警告，并且控件可能会到达非空块的末尾。

Answer 1

Beeblex开发者在这里。 -validateWithCompletionBlock中的代码：异步执行（在后台，它需要与我们的服务器通信，因此在我们等待Internet执行其操作时，没有必要完全阻止您的应用程序。）

因此，您需要重新考虑验证收据的方法。现在你，一般工作流程是：

完成购买
致电Beeblex
等待回复
检查布尔值

但＃3马上回来，所以这永远不会奏效。你应该考虑做这样的事情：

完成购买
显示“请稍候......”视图或类似内容，建议用户解锁他们购买的任何内容。
致电Beeblex
在块中，确定验证是否成功，然后用于解锁内容。
坐空闲直到阻止

这是一个快速而肮脏的例子。我没有编译它，所以它可能有一些错误，但它应该给你想法背后的想法。

- (void) showWaitView {
    // Display a wait view
}


- (void) hideWaitView {
    // Hide the wait view
}


- (void) completeValidationWithValidateReceiptData:(NSDictionary *) receipt isRecoverableError(BOOL) isRecoverableError {
    [self hideWaitView];

    if (receipt) {
        // Unlock the content, tell the user
    } else {
        if (isRecoverableError) {
            // Probably a network error of some kind. Tell user they need to be connected,
            // and ask them to do it again.
        } else {
            // Keep the content locked, tell the user something went wrong
        }
    }
}

- (void) validateReceipt:(SKPaymentTransaction *) transaction {
    if (![BBXIAPTransaction canValidateTransactions]) {
        [self completeValidationWithValidateReceiptData:Nil isRecoverableError:YES];
        return;
    }

    BBXIAPTransaction *bbxTransaction = [[BBXIAPTransaction alloc] initWithTransaction:transaction];
    bbxTransaction.useSandbox = YES;

    [bbxTransaction validateWithCompletionBlock:^(NSError *error) {
        if (bbxTransaction.transactionVerified) {
            if (bbxTransaction.transactionIsDuplicate) {
                // The transaction is valid, but duplicate - it has already been sent to Beeblex in the past.
                [FlurryAnalytics logEvent:@"Transaction duplicate!"];
                [self completeValidationWithValidateReceiptData:Nil isRecoverableError:NO];
            } else {
                // The transaction has been successfully validated and is unique
                [FlurryAnalytics logEvent:@"Transaction verified"];
                [self completeValidationWithValidateReceiptData:bbxTransaction.validatedTransactionData isRecoverableError:NO];
            }
        } else {
            // Check whether this is a validation error, or if something went wrong with Beeblex
            if (bbxTransaction.hasConfigurationError || bbxTransaction.hasServerError || bbxTransaction.hasClientError) {
                // The error was not caused by a problem with the data, but is most likely due to some transient networking issues
                [FlurryAnalytics logEvent:@"Transaction network error"];
                [self completeValidationWithValidateReceiptData:Nil isRecoverableError:YES];
            } else {
                // The transaction supplied to the validation service was not valid according to Apple
                [FlurryAnalytics logEvent:@"Transaction invalid!!"];
                [self completeValidationWithValidateReceiptData:Nil isRecoverableError:NO];
            }
        }
    }];
}

Answer 2

＆lt; 3 blocks

- (void)verifyTransaction:(SKPaymentTransaction *)transaction completionHandler:(void (^)(BOOL flag))completionHandler
{
    if (![BBXIAPTransaction canValidateTransactions]) {
        completionHandler(YES); // There is no connectivity to reach the server
    }

    BBXIAPTransaction *bbxTransaction = [[BBXIAPTransaction alloc] initWithTransaction:transaction];
    bbxTransaction.useSandbox = YES;
    [bbxTransaction validateWithCompletionBlock:^(NSError *error) {
        if (bbxTransaction.transactionVerified) {
            if (bbxTransaction.transactionIsDuplicate) {
                // The transaction is valid, but duplicate - it has already been sent to Beeblex in the past.
                NSLog(@"Transaction is a duplicate!");
                [FlurryAnalytics logEvent:@"Transaction duplicate!"];
                completionHandler(NO);
            } else {
                // The transaction has been successfully validated and is unique
                NSLog(@"Transaction valid data:%@",bbxTransaction.validatedTransactionData);
                [FlurryAnalytics logEvent:@"Transaction verified"];
                completionHandler(YES);
            }
        } else {
            // Check whether this is a validation error, or if something went wrong with Beeblex
            if (bbxTransaction.hasConfigurationError || bbxTransaction.hasServerError || bbxTransaction.hasClientError) {
                // The error was not caused by a problem with the data, but is most likely due to some transient networking issues
                NSLog(@"Transaction error caused by network, not data");
                [FlurryAnalytics logEvent:@"Transaction network error"];
                completionHandler(YES);
            } else {
                // The transaction supplied to the validation service was not valid according to Apple
                NSLog(@"Transaction not valid according to Apple");
                [FlurryAnalytics logEvent:@"Transaction invalid!!"];
                completionHandler(NO);
            }
        }
    }];
}

然后使用

[instance verifyTransaction:transaction completionHandler:^(BOOL flag) {
    if (flag) {
        // YOUR CODE HERE
    }
}];

而不是

if ([instance verifyTransaction:transaction]) {
    // YOUR CODE HERE
}

方法BOOL从块内部返回

2 个答案: