Contents

CFWriteStream

Declaration

class CFWriteStream

Overview

CFWriteStream provides an interface for writing a byte stream either synchronously or asynchronously. You can create streams that write bytes to a block of memory, a file, or a generic socket. All streams need to be opened, using CFWriteStreamOpen(_:), before writing.

Use CFReadStream for reading byte streams, and for the functions, such as CFStreamCreatePairWithSocketToHost(_:_:_:_:_:), that create socket streams).

CFWriteStream is “toll-free bridged” with its Cocoa Foundation counterpart, OutputStream. 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 NSOutputStream * parameter, you can pass in a CFWriteStreamRef, and in a function where you see a CFWriteStreamRef parameter, you can pass in an NSOutputStream 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.

Topics

Creating a Write Stream

Opening and Closing a Stream

Writing to a Stream

Scheduling a Write Stream

Examining Stream Properties

Setting Stream Properties

Getting the CFWriteStream Type ID

Callbacks

See Also

Opaque Types