Question

当使用GCDAsyncSocket发送长文本字符串时，在接收端多次调用readDataWithTimeOut，但收到的数据不一致，即收到相同的文本但{{1} } 是不同的。造成这种差异的可能原因是什么？请告诉我，因为我对NSData知之甚少。

GCDAsyncSocket

Answer 1

使用此

socket.readDataToData(getNsData(), withTimeout: -1, tag: 1)

而不是

socket.readDataWithTimeout(1, tag: 0)

使用的功能 -

private func getNsData()-> NSData{
        return NSData(bytes: "#####", length: 5)
    }

并要求服务人员在回复结束时附加“#####”

//本地套接字连接到远程套接字

func socket(socket : GCDAsyncSocket, didConnectToHost host:String, port p:UInt16)

{

    println("Connected to \(host) on port \(p).")

    socket.readDataToData(getNsData(), withTimeout: -1, tag: 2)

}

//Some message from remote socket

func socket(socket : GCDAsyncSocket, didReadData data:NSData, withTag tag:UInt16)

{

    var response = NSString(data: data, encoding: NSUTF8StringEncoding) as! String

    let stringLength = count(response) // Since swift1.2 `countElements` became `count`

    let substringIndex = stringLength - count("#####")

    var servResWithoutHash = response.substringToIndex(advance(response.startIndex, substringIndex))

    println("Updated response  \(servResWithoutHash)")



    if let action = getTheCommand(servResWithoutHash){

        println("COMMAND ==  \(action)")

    socket.readDataToData(getNsData(), withTimeout: -1, tag: 2)

}

//Notifies when socket gets disconnected

func socketDidDisconnect(sock: GCDAsyncSocket!, withError err: NSError!) {

    println("Socket did disconnect with error \(err?.description)");
}

GCDAsyncSocket部分读取长文本：iOS

1 个答案: