问创建一个通过Swift 3中的套接字接收数据的InputStream (iOS)

EN

var inputstream: InputStream?
var outputstream: OutputStream?
var host: CFString?
var port: UInt32?
override func viewDidLoad() {
    super.viewDidLoad()
    initNetworkCommunication()
}
func initNetworkCommunication(){
    host = "192.168.1.187" as CFString
    port = 55555
    var readstream : Unmanaged<CFReadStream>?
    var writestream : Unmanaged<CFWriteStream>?
    CFStreamCreatePairWithSocketToHost(kCFAllocatorDefault, host!, port!, &readstream, &writestream)

    inputstream? = readstream!.takeRetainedValue()
    outputstream? = writestream!.takeRetainedValue()

    inputstream?.delegate = self as! StreamDelegate
    outputstream?.delegate = self as! StreamDelegate


    inputstream?.schedule(in: RunLoop.current, forMode: RunLoopMode.defaultRunLoopMode)
    outputstream?.schedule(in: RunLoop.current, forMode: RunLoopMode.defaultRunLoopMode)

    inputstream?.open()
    Status.text = "Input Stream Opened"
    outputstream?.open()
    Status.text = "Output Stream Opened"

}
func stream(_ aStream: Stream, handleEvent eventCode: Stream.Event) {
    switch (eventCode){
    case Stream.Event.errorOccurred:
        print("Can not connect to the host!")
        Status.text = "Cannot connect to: \(host ?? "Null Host" as CFString)"
        break
    case Stream.Event.endEncountered:
        outputstream?.close()
        outputstream?.remove(from: RunLoop.current, forMode: RunLoopMode.defaultRunLoopMode)
        outputstream = nil
        break
    case Stream.Event.hasBytesAvailable:
        Status.text = "Recieving data..."
        NSLog("HasBytesAvaible")
        var buffer = [UInt8](repeating: 0, count: 4096)
        if ( aStream == inputstream){
            while (inputstream?.hasBytesAvailable)!{
                var len = inputstream?.read(&buffer, maxLength: buffer.count)
                if(len! > 0){
                    Status.text = "Collected data..."
                    var data1 = NSData(bytes: buffer, length: buffer.count)
                    Status.text = "Converted Data to NSData..."
                    var str64 = data1.base64EncodedData(options: .lineLength64Characters)
                    Status.text = "Decode Base64..."
                    let data: NSData = NSData(base64Encoded: str64 , options: .ignoreUnknownCharacters)!
                    // turn  Decoded String into Data
                    Status.text = "Turning Base64 data into image..."
                    let dataImage = UIImage(data: data as Data)
                    Status.text = "Done"
                    // pass the data image to image View.:)
                    Display.image = dataImage
                    Status.text = "Image Displayed"
                }
            }
        }
        break
    case Stream.Event.openCompleted:
        NSLog("OpenCompleted")
        break
    case Stream.Event.hasSpaceAvailable:
        NSLog("HasSpaceAvailable")
        break
    default:
        print("Unknown event")
    }
}