#pragma mark 4.實現觀察者監聽付錢的代理方法,只要交易發生變化就會走下面的方法
-(void)paymentQueue:(SKPaymentQueue *)queue updatedTransactions:(NSArray *)transactions{
    
    /*
     SKPaymentTransactionStatePurchasing,    正在購買
     SKPaymentTransactionStatePurchased,     已經購買
     SKPaymentTransactionStateFailed,        購買失敗
     SKPaymentTransactionStateRestored,      回覆購買中
     SKPaymentTransactionStateDeferred       交易還在佇列裡面，但最終狀態還沒有決定
     
 
*/

    for (SKPaymentTransaction *transaction in transactions) {
        switch (transaction.transactionState) {
            case SKPaymentTransactionStatePurchasing:{
                [MBProgressHUD hideHUD];
                [MBProgressHUD showMessage:@"正在購買中，別走開..."];
                NSLog(@"正在購買...
 
");
            }
                break;
            case SKPaymentTransactionStatePurchased:{
                // 購買後告訴交易佇列，把這個成功的交易移除掉
                [queue finishTransaction:transaction];
                [MBProgressHUD hideHUD];
                [self SavePaymentTransactionpAfterbuyAppleStoreProductSucceed:transaction];
                NSLog(
 
@"購買成功");
            }
                break;
            case SKPaymentTransactionStateFailed:{
                // 購買失敗也要把這個交易移除掉
                [queue finishTransaction:transaction];
                [MBProgressHUD hideHUD];
                self.conchChargeView.userInteractionEnabled = YES;
                NSString *errorInfo = @"購買失敗，請稍後重新購買";
                if (transaction.error) {
                    NSString *reason = transaction.error.userInfo[NSLocalizedFailureReasonErrorKey];
                    if ([StringUtility isStringNotEmptyOrNil:reason]) {
                        errorInfo = reason;
                    }
                }
                UIAlertView *alertView = [[UIAlertView alloc] initWithTitle:@"提示" message:errorInfo delegate:nil cancelButtonTitle:@"關閉" otherButtonTitles:nil, nil];
                [alertView show];
                NSLog(@"購買失敗");
            }
                break;
            case SKPaymentTransactionStateRestored:{
                // 回覆購買中也要把這個交易移除掉
                [queue finishTransaction:transaction];
                [MBProgressHUD hideHUD];
                self.conchChargeView.userInteractionEnabled = YES;
                UIAlertView *alertView = [[UIAlertView alloc] initWithTitle:@"提示" message:@"重複購買了" delegate:nil cancelButtonTitle:@"關閉" otherButtonTitles:nil, nil];
                [alertView show];
                NSLog(@"重複購買了");
            }
                break;
            case SKPaymentTransactionStateDeferred:{
                NSLog(@"交易還在佇列裡面，但最終狀態還沒有決定");
            }
                break;
            default:
                break;
        }
    }
}