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我在製作Game Center遊戲。我發送包含struct MovePacket
這樣的數據包:在Swift中從NSData中提取結構
var packet = MovePacket(packetID: 1, move: myMove)
let dataPacket = NSData(bytes: &packet, length: sizeof(MovePacket))
currentMatch!.sendDataToAllPlayers(dataPacket, withDataMode: GKMatchSendDataMode.Reliable, error: nil)
這就像在Objective-C,但我不知道如何接收NSData
解碼回到我struct MovePacket
。這是我的嘗試之一:
func match(match: GKMatch!, didReceiveData data: NSData!, fromRemotePlayer player: GKPlayer!) {
var packet : MovePacket
data.getBytes(&packet, length: sizeof(MovePacket)) // getting error here: Address of variable 'packet' taken before it is initialized
println(packet) //Variable 'packet' used before being initialized
}
您是否嘗試過'VAR包:MovePacket()'? – 2014-10-10 18:02:10
我沒有看到您的代碼中提到的任何日期。你的意思是說「從** NSData **解碼它」? – 2014-10-10 18:28:25
@robmayoff我的意思是數據不是日期。感謝您的編輯。 – 2014-10-10 19:45:05