The request body as an input stream.
- iOS 2.0+
- macOS 10.4+
- Mac Catalyst 13.0+
- tvOS 9.0+
- watchOS 2.0+
nil if the body stream has not been set. The returned stream is for examination only—it is not safe to manipulate the stream in any way.
The receiver will have either an HTTP body or an HTTP body stream, only one may be set for a request. A HTTP body stream is preserved when copying an
NSURLRequest object, but is lost when a request is archived using the