copy()

Declaration

func copy() -> Any

Return Value

The object returned by the NSCopying protocol method copy(with:),.

Discussion

This is a convenience method for classes that adopt the NSCopying protocol. An exception is raised if there is no implementation for copy(with:).

NSObject does not itself support the NSCopying protocol. Subclasses must support the protocol and implement the copy(with:) method. A subclass version of the copy(with:) method should send the message to super first, to incorporate its implementation, unless the subclass descends directly from NSObject.

See Also

Creating, Copying, and Deallocating Objects

• init()
• mutableCopy()