How do I send data from a GKPlayer to another in a match?

Question

I would like to send NSData from a GKPlayer to another in a match. Therefore, the method sendDataToAllPlayers(_:withDataMode:error:) would be the most ideal.

func sendDataToAllPlayers(data: Int,
    withDataMode Reliable: GKMatchSendDataMode,
    error: NSErrorPointer) -> Bool {

    return true
}

Though, how can I use the method above to send an Int variable?

var score:Int = 0

Pederson

Do you need to convert Int to NSData and Back to int ? – Georas

I probably do. It would be the better solution for my case. Any help is much appreciated. Thanks! – Pederson

raywenderlich.com/3276/… – Georas

www1.in.tum.de/lehrstuhl_1/home/98-teaching/tutorials/… – Georas

github.com/jackcook/GCHelper/blob/master/Source/GCHelper.swift – Georas

Answer 1

This version for encapsulating an Int (or other type) into or extracting it fromNSData should work even between devices with different byte orders:

// at sender before sending data
let data = NSMutableData()
let archiver = NSKeyedArchiver(forWritingWithMutableData: data)
archiver.encodeInteger(score, forKey: "score")
archiver.finishEncoding()

// at receiver after receiving data
let unarchiver = NSKeyedUnarchiver(forReadingWithData: data)
let score = unarchiver.decodeIntegerForKey("score")
unarchiver.finishDecoding()

Ecosphere

Answer 2

extension Int {
    var data: NSData {
        var source = self
        return NSData(bytes: &source, length: sizeof(Int))
    }
}
extension Double {
    var data: NSData {
        var source = self
        return NSData(bytes: &source, length: sizeof(Double))
    }
}
extension NSData {
    var integerValue:Int {
        var result = 0
        getBytes(&result, length: sizeof(Int))
        return result
    }
    var doubleValue:Double {
        var result:Double = 0
        getBytes(&result, length: sizeof(Double))
        return result
    }
}

let myIntegerData = 123.data                 // _NSInlineData
let backToInt = myIntegerData.integerValue   // 123

let myDoubleData = 123.456789.data           // _NSInlineData
let backToDouble = myDoubleData.doubleValue  // 123.456789

Georas

Thank you! How would I use this code in the sendDataToAllPlayers(_:withDataMode:error:) method? Thanks again. – Pederson

I am not sure if this code is what I am looking for, as it represents a partial answer to my question. – Pederson

Have you seen the last link I posted ? – Georas

Thank you for posting the links. The last two are pretty informative. Thank you for posting them. Working on them right now. You surely deserve a +1 from me. Thank you very much. – Pederson