Returns the index, from a given set of indexes, of the object in the ordered set that passes a test in a given block for a given set of enumeration options.
- iOS 5.0+
- macOS 10.7+
- Mac Catalyst 13.0+
- tvOS 9.0+
- watchOS 2.0+
The indexes of the objects over which to enumerate.
A bitmask that specifies the options for the enumeration (whether it should be performed concurrently and whether it should be performed in reverse order).
The block to apply to elements in the ordered set.
The block takes three arguments:
The element in the ordered set.
The index of the element in the ordered set.
A reference to a Boolean value. The block can set the value to
YESto stop further processing of the set. The
stopargument is an out-only argument. You should only ever set this value to
YESwithin the block.
The block returns a Boolean value that indicates whether
objpassed the test.
The index of the corresponding value in the ordered set passes the test specified by predicate. If no objects in the ordered set pass the test, returns NSNotFound.