[绍棠] This In-App purchase has already been bought. It will be restored for free.

 

出现这样的问题，是支付没有finish造成的，一般在支付过程中断网了，下次再购买同一商品的时候就会出现这样的问题，

解决办法，在点击购买的时候判断支付队列中是否有为finish的商品，若有，则进行处理之后将其finish

 NSArray* transactions = [SKPaymentQueue defaultQueue].transactions;

    if (transactions.count > 0) {

        //检测是否有未完成的交易

        SKPaymentTransaction* transaction = [transactions firstObject];

        if (transaction.transactionState == SKPaymentTransactionStatePurchased) {

            [self completeTransaction:transaction];

            return;

        } else if (transaction.transactionState == SKPaymentTransactionStateFailed){

            [self finishTransaction:transaction wasSuccessful:NO];

            return;

        }

    }