connecting to sockets in swift

connect_socket.swift

 var inputStream : NSInputStream?
 var outputStream : NSOutputStream?
 
 func connect() {
    var readStream : Unmanaged<CFReadStream>?
    var writeStream : Unmanaged<CFWriteStream>?
    let host : CFString = NSString(string: self.host)
    let port : UInt32 = UInt32(self.port)
        
    CFStreamCreatePairWithSocketToHost(kCFAllocatorDefault, host, port, &readStream, &writeStream)
        
    inputStream = readStream!.takeUnretainedValue()
    outputStream = writeStream!.takeUnretainedValue()
        
    inputStream!.delegate = self
    outputStream!.delegate = self
        
    inputStream!.scheduleInRunLoop(NSRunLoop.currentRunLoop(), forMode: NSDefaultRunLoopMode)
    outputStream!.scheduleInRunLoop(NSRunLoop.currentRunLoop(), forMode: NSDefaultRunLoopMode)
        
    inputStream!.open()
    outputStream!.open()
  }

The method CFStreamCreatePairWithSocketToHost(...) is a creation function with 'create' in its name and follows Apple's Create Rule. It therefore returns a retained value and should be retrieved with stream.takeRetainedValue(), as does this gist 😄