Locates and returns the address of the receiver’s implementation of a method so it can be called as a function.
- iOS 2.0+
- macOS 10.0+
- tvOS 9.0+
- watchOS 2.0+
- Objective-C Runtime
The address of the receiver’s implementation of the
If the receiver is an instance,
a should refer to an instance method; if the receiver is a class, it should refer to a class method.