使 com.apple.CoreData.ConcurrencyDebug 1 工作 [英] Making com.apple.CoreData.ConcurrencyDebug 1 work

问题描述

我正在尝试迁移一些代码以使用 NSManagedObjectContext 和 NSPrivateQueueConcurrencyType.

在将上下文保存到其父级，然后保存父级后，我有时会遇到非常奇怪的错误.我想知道这些是否是由于没有正确使用 NSPrivateQueueConcurrencyType 上下文.

我已打开 来自 Ole Begemann

I am trying to migrate some code to use an NSManagedObjectContext with NSPrivateQueueConcurrencyType.

I'm sometimes getting very odd errors after saving the context to its parent, and then saving the parent. I'm wondering if these are due to be not using the NSPrivateQueueConcurrencyType context correctly.

I've turned on -com.apple.CoreData.ConcurrencyDebug 1 to try to debug this. I'm pretty sure that this is not working however. If I perform operations on managed object context or change its objects without using performBlock:, I don't get an error or a throw.

Here's how I've set up the scheme's arguments:. I've also tried it without the leading -.

Any idea what I'm doing wrong?

解决方案

The argument -com.apple.CoreData.ConcurrencyDebug is available from iOS > 8 and OSX > 10.10 : make sure you target the right platform.

The console should log this if the flag is enabled :

CoreData: annotation: Core Data multi-threading assertions enabled.

Source : Core Data Concurrency Debugging from Ole Begemann

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