多财产“交易”在核心数据/ NSManagedObject / NSFetchedResultsController 中？
是否可以设置 NSManagedObject 的多个属性并让 NSFetchedResultsController 调用controllerDidChangeContent: 一次？
换句话说，是否可以这样说：
[managedObject beginChanges];
[managedObject setPropertyA:@"Foo"];
[managedObject setPropertyB:@"Bar"];
[managedObject commitChanges];
然后让 NSFetchedResultsController 调用controllerDidChangeContent：（以及其他方法）一次？
谢谢！
Is it possible to set multiple properties of an NSManagedObject and have the NSFetchedResultsController call controllerDidChangeContent: only once?
In other words, is it possible to say something like:
[managedObject beginChanges];
[managedObject setPropertyA:@"Foo"];
[managedObject setPropertyB:@"Bar"];
[managedObject commitChanges];
and then have the NSFetchedResultsController call controllerDidChangeContent: (and the other methods) only one time?
Thanks!
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我现在通过创建另一个 NSManagedObjectContext 来解决这个问题，它充当更改的“便笺簿”。然后，当所有编辑完成后，它会使用
mergeChangesFromContextDidSaveNotification:合并回其他上下文。有一个名为 CoreDataBooks 的示例项目展示了其工作原理。I'm solving it now by creating another
NSManagedObjectContext, that acts as 'scratch pad' for the changes. Then when all edits have been done, it's merged back into the other context, usingmergeChangesFromContextDidSaveNotification:. There is a sample project called CoreDataBooks showing how this works.虽然绝对不是完美的解决方案，但您可以向托管对象类添加一个方法，该方法采用两个新的属性值，并且工作方式与上面的代码非常相似。
While definitely not a perfect solution, you could add a method to your managed object class that takes the two new property values, and works much like your code above.