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I am new to Core Data and I feel that I don't get a hang of it. When you are going to create a new managed object you have to use the method that I pasted in at the bottom from the NSEntityDescription class.

Now is this object registered in the context, it is right? Why do you have the insertObject: in NSManagedContext then? It works without invoking that method after using the one in NSEntityDescription. Could somebody explain?

NSManagedContext

insertObject:

NSEntityDescription

+ (id)insertNewObjectForEntityForName:(NSString *)entityName inManagedObjectContext:(NSManagedObjectContext *)context
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您可以使用上下文创建 NSManagedObject，nil然后决定是否要将其添加到上下文中。你可能也喜欢这样：有没有办法在不插入的情况下实例化一个 NSManagedObject？

于 2012-05-24T07:13:23.167 回答