未调用Swift 4 StreamDelegate

我一直在努力与我的服务器建立连接，并已使其连接。但是，未调用流委托。我正在将流委托设置为self，尝试使用.schedule、.unrepainedvalue和.retainedvalue、.casted和notcasted来处理.schedule、。。这是我的乐趣

var inputOpened = false
var outputOpened = false
var state: NetworkState?
var inputStream: InputStream!
var outputStream: OutputStream!
func connect() {
    state = NetworkState.NetworkStateConnectingToServer
    var readStream:  Unmanaged<CFReadStream>?
    var writeStream: Unmanaged<CFWriteStream>?

    CFStreamCreatePairWithSocketToHost(nil, "192.168.1.4" as CFString, 1955, &readStream, &writeStream)

    inputStream = readStream?.takeRetainedValue() as! InputStream!
    outputStream = writeStream?.takeUnretainedValue() as! OutputStream!
    inputStream.delegate = self
    outputStream.delegate = self
    inputStream.schedule(in: RunLoop.current, forMode: RunLoopMode.defaultRunLoopMode)
    outputStream.schedule(in: RunLoop.current, forMode: RunLoopMode.defaultRunLoopMode)
    inputStream.open()
    outputStream.open()
}

 func stream(_ aStream: Stream, handle eventCode: Stream.Event) {
    print("ran")
    DispatchQueue.main.async(execute: {
        if aStream == self.inputStream {
            self.inputStreamHandle(eventCode)
        }
        else if aStream == self.outputStream {
            self.outputStreamHandle(eventCode)
        }

    })
}