如何在XCode调试器中调试NSManagedObjects？

Question

How do you get to the values of your Entity (sub class of NSManaged Object) when in the XCode debugger? I get lost among the NSObject and _cd_XXX structures.

Answer 1

如果在变量窗格中选择实体，然后从上下文菜单中选择“将描述打印到控制台”，则会获得实体的文本转储。

Answer 2

In the Debugger Console type

po [your_entity your_property]

I don't really know another useful way, as the entity may eg be faulted and also the NSManagedObject structure isn't really helpful, as you already noticed.

Answer 3

Go into the debugger window, right-click, "Add Expression..." and type in the expression as it would appear in the code; you can also type p <expression> in the debugger to similar effect. For example in my case:

managedObjectContext.registeredObjects.first?.value(forKey: "shifts") as? [Shift]

If you're dealing with something which is an undifferentiated NSObject or NSManagedObject or similar then this can be a bit of a pain and you may want to dump the expression as described in the other answers here, but if the object does have a proper interface (eg, the variable has a type of NSObject but the object has a more specific class) then casting it in the debugger would generally do nicely.