Types of socket activity that can cause the callback function of a CFSocket object to be called.
- iOS 2.0+
- macOS 10.0+
- tvOS 9.0+
- watchOS 2.0+
- Core Foundation
The callback types for which a callback is made is determined when the CFSocket object is created, such as with
CFSocket, or later with
k callbacks are mutually exclusive.
k is available in macOS 10.2 and later.