颤振：storekit_duplicate_product_object。有相同产品标识符的待处理交易

Posted 2023-02-23

【中文标题】颤振：storekit_duplicate_product_object。有相同产品标识符的待处理交易

【英文标题】：Flutter: storekit_duplicate_product_object. There is a pending transaction for the same product identifier

【发布时间】：2021-07-25 19:14:59

【问题描述】：

我正在使用应用内购买官方插件。但是当我尝试在 ios 上购买订阅时，我看到了以下错误：

Unhandled Exception: PlatformException(storekit_duplicate_product_object, There is a pending transaction for the same product identifier. Please either wait for it to be finished or finish it manually using `completePurchase` to avoid edge cases., applicationUsername: null, requestData: null, quantity: 1, productIdentifier: in_app_test, simulatesAskToBuyInSandbox: false, null)

我正在使用 in_app_purchase 包的 in_app_purchase: ^0.5.2 版本

我调用它的代码如下所示：

   TextButton(
      child: Text(productDetails.price),
      style: flatButtonStyle,
      onPressed: () async 
        PurchaseParam purchaseParam = PurchaseParam(
            productDetails: productDetails,
            applicationUserName: null,
            sandboxTesting: false);
        if (productDetails.id == _kConsumableId) 
          _connection.buyConsumable(
              purchaseParam: purchaseParam,
              autoConsume: kAutoConsume || Platform.isIOS);
         else 
          _connection.buyNonConsumable(
              purchaseParam: purchaseParam);

        ,
    )

【参考方案1】：

请关注#60763

你可以使用SKPaymentQueueWrapper().finishTransaction(skPaymentTransactionWrapper)完成那些交易

为避免此错误，请将下面的代码放在buyNonConsumable 之前并开始工作：

var transactions = await SKPaymentQueueWrapper().transactions();
 transactions.forEach((skPaymentTransactionWrapper) 
    SKPaymentQueueWrapper().finishTransaction(skPaymentTransactionWrapper);
);

完整示例

TextButton(
  child: Text(productDetails.price),
  style: flatButtonStyle,
  onPressed: () async 
    PurchaseParam purchaseParam = PurchaseParam(
        productDetails: productDetails,
        applicationUserName: null,
        sandboxTesting: false);
    if (productDetails.id == _kConsumableId) 
      _connection.buyConsumable(
          purchaseParam: purchaseParam,
          autoConsume: kAutoConsume || Platform.isIOS);
     else 
      _connection.buyNonConsumable(
          purchaseParam: purchaseParam);
      var transactions = await SKPaymentQueueWrapper().transactions();
      transactions.forEach((skPaymentTransactionWrapper) 
        SKPaymentQueueWrapper().finishTransaction(skPaymentTransactionWrapper);
      );
    
  ,
)

答案来自siloebb's answer

【讨论】：

这个SKPaymentQueueWrapper在哪里？好像没找到。

没关系，我找到了。它在package:in_app_purchase_ios/store_kit_wrappers.dart。

我认为我们需要在_connection.buyNonConsumable() 之前调用SKPaymentQueueWrapper().finishTransaction(skPaymentTransactionWrapper);，而不是之后。