创建核心日期实体实例但不希望它被存储（非持久性） [英] Create a Core Date Entity Instance But not want it to be stored(non-persistent)

问题描述

有时我需要实例化CoreDateEntity来存储一些信息以便临时使用。
但是我不需要将它存储到DB中。

Sometimes I need instantiate CoreDateEntity to store some infomations for temporarily using. But I needn't it be stored into DB.

目前我创建了一个类似的类，它具有与CoreDateEntity相同的结构。
它运行良好，但我必须在两个模型之间做很多数据传输。

currently I created a similar class which have same structures as the CoreDateEntity does. It works well but I have to do many datas transfer between Two models.

有更好的方法来处理吗？

Is there any better way to handle this?

感谢所有回复。但你们只是给我一半答案。考虑一下，我需要把一些没有MOC的实体放到当前数据库池中，我该怎么做呢？我已经检查了CoreData的文档，似乎我没有找到API将一个实体从MOC转移到另一个MOC（管理对象上下文）。

Thanks for all the replies. but you guys just give me half answer of this. consider about this, I need place some entity without MOC into current database pool, how could I do this? I already checked the documents of CoreData, seems I didn't find API to transfer one entity from MOC to another MOC(manage object context).

推荐答案

根据Apple文档，如果您指定nil为上下文，则可以初始化一个无上下文的托管对象。

According to Apple docs you can initialize a managed object without context if you specify nil as context.

- (id)initWithEntity:(NSEntityDescription *)entity insertIntoManagedObjectContext:(NSManagedObjectContext *)context

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