iOS：在应用程序购买中使用购买进度指示器UIActivityIndi​​catorView

Question

我在这个主板上尝试了几种解决方案，但从未成功过。我想要的是当用户点击Buy Button时，UIAlertView会出现UIActivityIndicatorView，等待应用访问应用商店。但是一旦购买完成，我不知道在哪里解雇这个UIAlertView。我知道要解雇UIAlertView，我们会使用：[alert dismissWithClickedButtonIndex:-1 animated:YES];

那么请你帮我回答两个问题：

1）我的代码是否正常或其他任何更好的代码来实现它？

2）对于所有情况，我应该在哪里解雇UIAlertView：

• 用户接受购买
• 用户取消购买
• 购买不成功

以下是我的代码：

-(void)paymentQueue:(SKPaymentQueue *)queue updatedTransactions:(NSArray *)transactions{
    UIAlertView *alert;
    for(SKPaymentTransaction *transaction in transactions){
        switch (transaction.transactionState) {
            case SKPaymentTransactionStatePurchasing:                   
                 alert = [[UIAlertView alloc]initWithTitle: @"In App Purchase" message: @"Processing your purchase..." delegate: nil cancelButtonTitle: nil otherButtonTitles: nil];
                UIActivityIndicatorView *ind = [[UIActivityIndicatorView alloc]initWithActivityIndicatorStyle: UIActivityIndicatorViewStyleWhiteLarge];
                [ind startAnimating];    
                [alert addSubview: ind];
                [alert show];
                [ind release];
                [alert release];
                break;
            case SKPaymentTransactionStatePurchased:
                [[SKPaymentQueue defaultQueue]finishTransaction:transaction];
                UIAlertView *tmp = [[UIAlertView alloc]
                                    initWithTitle:@"Complete"  
                                    message:@"You have bought the full version!"  
                                    delegate:self  
                                    cancelButtonTitle:nil  
                                    otherButtonTitles:@"Ok", nil];  
                [tmp show];  
                [tmp release];
                break;
            case SKPaymentTransactionStateRestored:
                [[SKPaymentQueue defaultQueue]finishTransaction:transaction];
                break;
            case SKPaymentTransactionStateFailed:
                if (transaction.error.code !=SKErrorPaymentCancelled) {
                    [[SKPaymentQueue defaultQueue]finishTransaction:transaction];
                    UIAlertView *tmp = [[UIAlertView alloc]
                                        initWithTitle:@"Error"  
                                        message:@"Purchase not successful!"  
                                        delegate:self  
                                        cancelButtonTitle:nil  
                                        otherButtonTitles:@"Ok", nil];  
                    [tmp show];  
                    [tmp release];              
                }
                [[SKPaymentQueue defaultQueue]finishTransaction:transaction];
                break;
        }
    }
}

Answer 1

尝试添加

case SKPaymentTransactionStatePurchased:
[alert dismissWithClickedButtonIndex:-1 animated:YES];

和

case SKPaymentTransactionStateFailed:
[alert dismissWithClickedButtonIndex:-1 animated:YES];