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enumerateRanges(options:using:)

Executes a given block using each object in the index set, in the specified ranges.

Declaration

func enumerateRanges(options opts: NSEnumerationOptions = [], using block: (NSRange, UnsafeMutablePointer<ObjCBool>) -> Void)

Parameters

  • opts:

    A bitmask that specifies the Nsenumerationoptions for the enumeration (whether it should be performed concurrently and whether it should be performed in reverse order).

  • block:

    The block to apply to elements in the index set.

    The block takes two arguments:

    range

    The range of objects of the elements in the index set.

    stop

    A reference to a Boolean value. The block can set the value to True to stop further processing of the array. The stop argument is an out-only argument. You should only ever set this Boolean to True within the Block.

Discussion

By default, the enumeration starts with the first object and continues serially through the indexed set range to the last object in the range. You can specify NSEnumerationConcurrent and/or NSEnumerationReverse as enumeration options to modify this behavior.

This method executes synchronously.

See Also

Enumerating Index Set Content