在Swift 3（iOS）中創建一個通過套接字接收數據的InputStream

Question

所以我的問題是讓一個InputStream在iOS平臺的swift中工作。我寫了一些代碼，並會在下面發佈，但基本上我有一個Android客戶端，它將數據發送到iOS客戶端的IP。不幸的是，Android客戶端說連接被拒絕連接到iOS客戶端。我真的不太確定我在這裏做錯了什麼，因爲我認爲代碼看起來很紮實，所以我有點困惑。順便說一句，這是我第一次使用swift（iOS）中的套接字，所以請理解我是新手，並且在這裏通過示例代碼來學習。

ViewControler.swift

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") 
    } 
} 

Answer 1

這聽起來像Android設備正在嘗試連接到iOS設備，然後從已發佈的代碼，iOS設備試圖連接到Android設備。這不是套接字網絡的工作原理。

其中一個設備（或兩者，如果這是一個對等設置）需要偵聽特定端口上的連接。有關從iOS創建偵聽套接字的信息，請參閱本指南（https://developer.apple.com/library/content/documentation/NetworkingInternet/Conceptual/NetworkingTopics/Articles/UsingSocketsandSocketStreams.html#//apple_ref/doc/uid/CH73-SW8）。