CoreData: Fetching an Object from an unsaved Conte

2020-06-18 03:54发布

after I insert a ManagedObject into a context I'd like to fetch it later but before saving the context (I'd save after all objects are inserted). It appears that querying the context later with a fetch concerning those objects returns nothing if the context wasn't previously saved. Is there a way to save only in the end ?(I guess i can save my objects in an array or dictionary and query that but i thought coredata would do this for me)

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你好瞎i
2楼-- · 2020-06-18 04:23

Try this:

[myFetchRequest setIncludesPendingChanges:YES];

From the documentation:

Sets if, when the fetch is executed, it matches against currently unsaved changes in the managed object context.

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