Creates a named index in a file whose location is specified with a CFURL object.


func SKIndexCreateWithURL(_ inURL: CFURL!, _ inIndexName: CFString!, _ inIndexType: SKIndexType, _ inAnalysisProperties: CFDictionary!) -> Unmanaged<SKIndex>!



The location of the index.


The name of the index. If you call this function with inIndexName set to NULL, Search Kit assigns the index the default index name IADefaultIndex. If you then attempt to create a second index in the same file without assigning a name, no second index is created and this function returns NULL. Search Kit does not currently support retrieving index names from an index.


The index type. See SKIndexType.


The text analysis properties dictionary, which optionally sets the minimum term length, stopwords, term substitutions, maximum unique terms to index, and proximity support (for phrase-based searches) when creating the index. See Text Analysis Keys. To get the analysis properties of an index, use the SKIndexGetAnalysisProperties(_:) function. The inAnalysisProperties parameter can be NULL, in which case Search Kit applies the default dictionary, which is NULL.

Return Value

A unique reference to the newly created index.


SKIndexCreateWithURL creates an index in a file. Search Kit indexes are initially empty. Use this function when your application needs persistent storage of an index. To create a memory-based, nonpersistent index, use SKIndexCreateWithMutableData(_:_:_:_:).

A file can contain more than one index. To add a new index to an existing file, use the same value for inURL and supply a new name for inIndexName.

Search Kit is thread-safe. You can use separate indexing and searching threads. Your application is responsible for ensuring that no more than one process is open at a time for writing to an index.

When your application no longer needs the index, dispose of it by calling SKIndexClose(_:).

Special Considerations

You cannot use CFMakeCollectable with SKIndex objects.

See Also

Creating, Opening, and Closing Indexes

func SKIndexOpenWithData(CFData!, CFString!)

Opens an existing, named index for searching only.

func SKIndexOpenWithMutableData(CFMutableData!, CFString!)

Opens an existing, named index for searching and updating.

func SKIndexOpenWithURL(CFURL!, CFString!, Bool)

Opens an existing, named index stored in a file whose location is specified with a CFURL object.

func SKIndexGetIndexType(SKIndex!)

Gets the category of an index.

func SKIndexGetTypeID()

Gets the type identifier for Search Kit indexes.