IPhone socket Development

Q: given that + Getstreamstohost: Port: inputstream: outputstream: Is not supported on iPhone OS, how can I create nsstreams for a TCP connection to a named host? A: You can do this by exploiting the toll-free bridge between nsstream and cfstream. UseCfstreamcreatepairwithsockettohost To create cfstreams to the host, and then cast the resulting cfstreams to nsstreams. Listing 1 Shows an example of this. It adds a category to nsstream that implements a replacement+ Getstreamstohost: Port: inputstream: outputstream:. Listing 1: A category to creates TCP streams to a named host @ Interface nsstream (myadditions) + (void) getstreamstohostnamed :( nsstring *) hostname port :( nsinteger) Port inputstream :( nsinputstream **) inputstreamptr outputstream :( nsoutputstream **) outputstreamptr; @ end @ implementation nsstream (myadditions) + (void) getstreamstohostnamed :( nsstring *) hostname port :( nsinteger) Port inputstream :( nsinputstream **) inputstreamptr outputstream :( nsoutputstream **) outputstream PTR {cfreadstreamref readstream; cfwritestreamref writestream; Assert (hostname! = Nil); Assert (Port> 0) & (Port <65536); Assert (inputstreamptr! = NULL) | (outputstreamptr! = NULL); readstream = NULL; writestream = NULL; cfstreamcreatepairwithsockettohost (null, (cfstringref) hostname, port, (inputstreamptr! = Nil )? & Readstream: NULL), (outputstreamptr! = Nil )? & Writestream: NULL); If (inputstreamptr! = NULL) {* inputstreamptr = [nsmakecollectable (readstream) autorelease];} If (outputstreamptr! = NULL) {* outputstreamptr = [nsmakecollectable (writestream) autorelease] ;}}@ end