In swift NSNetService class how to send data using getInoutStream - swift

Question

Currently I am working on a program in which i am connecting two IOS devices using NSNetService class. I am able to connect both the devices but i don't know how to send data using getInoutStream function. Can any buddy help me.

Answer 1

Why not use multipeer? It's a much simpler solution to what you're trying to do. Also NSNetService has a few known bugs. However, you send data between the two by setting up a Bonjour connection on NSNetService. The getInputStream method requires arguments of the type UnsafeMutablePointer:
public func getInputStream(inputStream: UnsafeMutablePointer<NSInputStream?>, outputStream: UnsafeMutablePointer<NSOutputStream?>) -> Bool
var inputStream : NSInputStream?
var outputStream : NSOutputStream?
let success = service.getInputStream(&inputStream, outputStream: &outputStream)
Then just write data using a memory stream and it'll get passed to the listener port.
This is the finished code:
This function initiates the connection on 127.0.0.1
func initNetworkCommunication(){
var host : CFString = "127.0.0.1"
var port : UInt32 = 7001
var readstream : Unmanaged<CFReadStream>?
var writestream : Unmanaged<CFWriteStream>?
CFStreamCreatePairWithSocketToHost(kCFAllocatorDefault, host, port, &readstream, &writestream)
inputstream = readstream!.takeRetainedValue()
outputstream = writestream!.takeRetainedValue()
inputstream.delegate = self
outputstream.delegate = self
inputstream.scheduleInRunLoop(NSRunLoop.currentRunLoop(), forMode: NSDefaultRunLoopMode)
outputstream.scheduleInRunLoop(NSRunLoop.currentRunLoop(), forMode: NSDefaultRunLoopMode)
inputstream.open()
And this is for the stream IO:
func stream(aStream: NSStream, handleEvent eventCode: NSStreamEvent) { //This is the stream IO function. It allows RW of the stream
switch (eventCode){
case NSStreamEvent.ErrorOccurred:
NSLog("ErrorOccurred")
break
case NSStreamEvent.EndEncountered:
NSLog("EndEncountered")
break
case NSStreamEvent.None:
NSLog("None")
break
case NSStreamEvent.HasBytesAvailable:
NSLog("HasBytesAvaible")
var buffer = [UInt8](count: 4096, repeatedValue: 0)
if ( aStream == inputstream){
while (inputstream.hasBytesAvailable){
var len = inputstream.read(&buffer, maxLength: buffer.count)
if(len > 0){
var output = NSString(bytes: &buffer, length: buffer.count, encoding: NSUTF8StringEncoding)
if (output != ""){
NSLog("server said: %#", output!)
}
}
}
}
break
case NSStreamEvent.allZeros:
NSLog("allZeros")
break
case NSStreamEvent.OpenCompleted:
NSLog("OpenCompleted")
break
case NSStreamEvent.HasSpaceAvailable:
NSLog("HasSpaceAvailable")
break
default:
// default code here
break
}