AWS的IOS SDK DynamoDB扫描 - MainThread在emulador作品，但不要在设备调试 [英] AWS IOS SDK DynamoDB Scan - MainThread works in emulador, but don't in device debugger

问题描述

在我的应用我使用DynamoDB扫描，在所有emulador的iOS版本，以x code然而，工作正常，当我调试的设备（iPhone 5℃），主线程不工作。

In my app I use DynamoDB scan that works fine in all emulador iOS versions in xCode, however, when I debug in device (iPhone 5c), the main thread don't works.

[[[dynamoDBObjectMapper scan:[DDBTableRow class]
                  expression:scanExpression]
      continueWithExecutor:[BFExecutor mainThreadExecutor] withSuccessBlock:^id(BFTask *task) {
//Main Thread execution          
.
.
.
return nil;
  }] continueWithExecutor:[BFExecutor mainThreadExecutor] withBlock:^id(BFTask *task) {
      if (task.error) {
          NSLog(@"refreshList Error");
      }
      return nil;
  }];

你知道吗？

推荐答案

要开始我加了一个异常断点跟踪。这引起了code停在发生错误的位置。仅供参考;后藤X code->查看 - > Navigators->显示断点​​导航。在左侧窗格中点击+，然后选择添加例外断点。运行该应用程序。

To start the tracker I added a exception breakpoint. This caused the code to stop at the point where the error occurs. fyi; Goto xcode->View->Navigators->Show Breakpoint Navigator. In the left pane click on "+" and select "Add exception breakpoint". Run the application.

该例外AWSDynamoDBObjectMapper发生 - removeAttributes方法。当此方法试图设置对象为mutableItem一个讯息话题*** setObjectForKey：对象不能是零推出，什么时候试图以处理返回的对象双（数字）项目。 奇怪的是只有在我的设备，而不是在X code所有模拟器......所以，我更新了我的POD（AWSiOSSDKv2 2.0.17（是2.0.13）），而这个问题奇迹般地解决了......

The exception occured in AWSDynamoDBObjectMapper - removeAttributes method. When this method tried to set object into mutableItem a messsage "*** setObjectForKey: object cannot be nil " was launched, exactly when tried to handle a double(number) item in the return object. Oddly only in my device, not in all emulators in Xcode... So I updated my pod (AWSiOSSDKv2 2.0.17 (was 2.0.13)) and this problem was magically solved...

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