Instance Method


Returns the number of objects a given fetch request would have returned if it had been passed to executeFetchRequest:error:.


- (NSUInteger)countForFetchRequest:(NSFetchRequest *)request error:(NSError * _Nullable *)error;



A fetch request that specifies the search criteria for the fetch.


If there is a problem executing the fetch, upon return contains an instance of NSError that describes the problem.

Return Value

The number of objects a given fetch request would have returned if it had been passed to executeFetchRequest:error:, or NSNotFound if an error occurs.

See Also

Registering and Fetching Objects

- executeFetchRequest:error:

Returns an array of objects that meet the criteria specified by a given fetch request.

- objectRegisteredForID:

Returns the object for a specified ID, if the object is registered with the context.

- objectWithID:

Returns an object for a specified ID even if the object needs to be fetched.

- existingObjectWithID:error:

Returns the object for the specified ID or nil if the object does not exist.


The set of objects registered with the context.

- executeRequest:error:

Passes a request to the persistent store without affecting the contents of the managed object context and returns a persistent store result.

- refreshAllObjects

Refreshes all currently registered objects that are associated with this context.


A Boolean value that indicates whether the context keeps strong references to all registered managed objects.

Beta Software

This documentation contains preliminary information about an API or technology in development. This information is subject to change, and software implemented according to this documentation should be tested with final operating system software.

Learn more about using Apple's beta software