Loads the metadata for the store.
SDKs
- iOS 5.0+
- macOS 10.7+
- Mac Catalyst 13.0+Beta
- tvOS 9.0+
- watchOS 2.0+
Framework
- Core Data
Declaration
func loadMetadata() throws
Parameters
errorIf an error occurs, on return contains an
NSErrorobject that describes the problem.
Return Value
true if the metadata was correctly loaded, otherwise false.
Discussion
In your implementation of this method, you must validate that the URL used to create the store is usable (the location exists and if necessary is writable, the schema is compatible, and so on) and return an error if there is an issue.
Any subclass of NSIncremental which is file-based must be able to handle being initialized with a URL pointing to a zero-length file. This serves as an indicator that a new store is to be constructed at the specified location and allows applications using the store to securely create reservation files in known locations.