- Core Foundation
CFRead provides an interface for reading a byte stream either synchronously or asynchronously. You can create streams that read bytes from a block of memory, a file, or a generic socket. All streams need to be opened, using
CFRead, before reading.
Use CFWriteStream for writing byte streams. The CFNetwork framework defines an additional type of stream for reading responses to HTTP requests.
CFReadStream is “toll-free bridged” with its Cocoa Foundation counterpart,
NSInput. This means that the Core Foundation type is interchangeable in function or method calls with the bridged Foundation object. Therefore, in a method where you see an
NSInput parameter, you can pass in a CFReadStreamRef, and in a function where you see a CFReadStreamRef parameter, you can pass in an
NSInput instance. Note, however, that you may have either a delegate or callbacks but not both. See Toll-Free Bridged Types for more information on toll-free bridging.