sockets - Using NSHost in iOS -

i'm trying make socket server application in swift ios. found great example:

    let addr = "127.0.0.1"     let port = 4000      var host :nshost = nshost(address: addr)     var inp :nsinputstream?     var out :nsoutputstream?      nsstream.getstreamstohost(host, port: port, inputstream: &inp, outputstream: &out)      let inputstream = inp!     let outputstream = out!     inputstream.open()     outputstream.open()      var readbyte :uint8 = 0     while inputstream.hasbytesavailable {         inputstream.read(&readbyte, maxlength: 1)     }      // buffer uint8 array containing bytes of string "jonathan yaniv.".     outputstream.write("hello", maxlength: "hello".length) 

i tried run code in xcode , said nshost didn't exist. googled , found nshost wasn't able ios. can use instead?

edit

i'm using cocoa async socket socket connections. can find here cocoaasyncscket

change getstreamstohost getstreamstohostwithname

change:

nsstream.getstreamstohost(host, port: port, inputstream: &inp, outputstream: &out) 

to

nsstream.getstreamstohostwithname(addr, port: port, inputstream: &inp, outputstream: &out)