Initializes a newly allocated set with the objects that are contained in a given array.
- iOS 2.0+
- macOS 10.0+
- UIKit for Mac 13.0+Beta
- tvOS 9.0+
- watchOS 2.0+
An array of objects to add to the new set. If the same object appears more than once in
array, it is represented only once in the returned set. Each object receives a
retainmessage as it is added to the set.
An initialized set with the contents of
array. The returned set might be different than the original receiver.