Function

MDQueryGetCountOfResultsWithAttributeValue(_:_:_:)

Returns the number of results which have the given attribute and attribute value.

Declaration

func MDQueryGetCountOfResultsWithAttributeValue(_ query: MDQuery!, _ name: CFString!, _ value: CFTypeRef!) -> CFIndex

Parameters

query

The query.

name

The attribute name to return the result count of. If the attribute is not one of those requested in the valueListAttrs parameter, the behavior is undefined.

value

The attribute value for which to return the number of results with that value. This parameter may be NULL, in which case the number of results that do not contain the specified attribute is returned.

Return Value

The number of results containing that attribute and value.

Discussion

This count may change over time if the query allows live-updates.

See Also

Getting Query Result Values

func MDQueryCopyValuesOfAttribute(MDQuery!, CFString!) -> CFArray!

Returns the list of values from the results of the query for the specified attribute.

func MDQueryGetAttributeValueOfResultAtIndex(MDQuery!, CFString!, CFIndex) -> UnsafeMutableRawPointer!

Returns the value of the named attribute for the result at the given index.

func MDQueryGetIndexOfResult(MDQuery!, UnsafeRawPointer!) -> CFIndex

Returns the current index of the given result.

func MDQueryGetResultAtIndex(MDQuery!, CFIndex) -> UnsafeRawPointer!

Returns the current result at the given index.

func MDQueryGetResultCount(MDQuery!) -> CFIndex

Returns the number of results currently collected by the query.