Type Method

setMetadata:forPersistentStoreOfType:URL:error:

Sets the metadata for a given store.

Declaration

+ (BOOL)setMetadata:(NSDictionary<NSString *,id> *)metadata forPersistentStoreOfType:(NSString *)storeType URL:(NSURL *)url error:(NSError * _Nullable *)error;

Parameters

metadata

A dictionary containing metadata for the store.

storeType

The type of the store at url. If this value is nil, Core Data will determine which store class should be used to get or set the store file's metadata by inspecting the file contents.

url

The location of a persistent store.

error

If no store is found at url or if there is a problem setting its metadata, upon return contains an NSError object that describes the problem.

Return Value

YES if the metadata was set correctly, otherwise NO.

Discussion

You can use this method to set the metadata for a store without the overhead of creating a Core Data stack.

See Also

Deprecated

NSPersistentStoreDidImportUbiquitousContentChangesNotification

Posted after records are imported from the ubiquitous content store.

Deprecated
NSPersistentStoreUbiquitousTransitionType

These constants are used as the value corresponding to the NSPersistentStoreUbiquitousTransitionTypeKey in the user info dictionary of NSPersistentStoreCoordinatorStoresWillChangeNotification and NSPersistentStoreCoordinatorStoresDidChangeNotification notifications to identify the type of event leading to a change.

Deprecated
+ removeUbiquitousContentAndPersistentStoreAtURL:options:error:

Deletes all ubiquitous content for all peers for the persistent store at a given URL and also delete the local store file.

Deprecated
+ metadataForPersistentStoreOfType:URL:error:

Returns a dictionary containing the metadata stored in the persistent store at a given URL.

Deprecated
- unlock

Relinquishes a previously acquired lock.

Deprecated
- lock

Attempts to acquire a lock.

Deprecated
- tryLock

Attempts to acquire a lock.

Deprecated

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