Question

我正在开发Mac OS应用程序，因为我想每5秒将图像发送到另一台Mac。我正在后端运行Node.js TCP服务器，并将它们都连接为TCP Client。

我正在尝试将Base64编码字符串发送到服务器，并且服务器正在将数据推送到客户端。

接收代码：

   extension SocketCreator: StreamDelegate {
        func stream(_ aStream: Stream, handle eventCode: Stream.Event) {
            switch eventCode {
            case Stream.Event.hasBytesAvailable:
                print("new message received")
                //readAvailableBytes(stream: aStream as! InputStream)
            case Stream.Event.endEncountered:
                disconnectFromHost()
            case Stream.Event.errorOccurred:
                print("error occurred  : \(aStream.streamError.debugDescription)")
            case Stream.Event.hasSpaceAvailable:
                print("has space available")
            default:
                print("some other event...")
                break
            }
        }

        private func readAvailableBytes(stream: InputStream) {
            let buffer = UnsafeMutablePointer<UInt8>.allocate(capacity: maxReadLength)

            while (stream != NSNull.init())&&stream.hasBytesAvailable {
                let numberOfBytesRead = inputStream.read(buffer, maxLength: maxReadLength)

                if numberOfBytesRead < 0 {
                    if let _ = inputStream.streamError {
                        break
                    }
                }

                let reciviedMsg = String(bytesNoCopy: buffer,
                                         length: numberOfBytesRead,
                                         encoding: .ascii,
                                         freeWhenDone: true)

                delegate?.scoktDidRecivceNewMessagew(message: reciviedMsg ?? "-NA-")


            }
        }
}

当我在第二台计算机上接收到base64字符串时，i丢失了一些，而base64无法解码。这可能是什么原因。

如果在使用base64编码字符串发送数据时做错了，那么在不丢失数据的情况下通过TCP对图像进行操作的最佳做法是什么。

这是我收集碎片的方式：

 func scoktDidRecivceNewMessage(message: String) {
       // print("Recived Command @ cient : \(message)")
        if message.contains("data:image/png;base64,") {
            hasStartedReadingImage = true
            base64ImageFrame = message
        }

        if hasStartedReadingImage {
            if message.contains("**end")
            {
                hasStartedReadingImage = false
                base64ImageFrame.append(message)
                var base64 = base64ImageFrame.replacingOccurrences(of: "data:image/jpeg;base64,", with: "")
                base64 = base64.replacingOccurrences(of: "**end", with: "")

                let nsImage = base64.base64Convert()
                DispatchQueue.main.async {
                    self.imgStremingView.image = nsImage
                }


            }else
            {
               base64ImageFrame.append(message)
            }
        }

    }

如何在Swift4中通过TCP连接发送图像

0 个答案: