fix #16

Author: nuclearace

SwiftIO/SocketAckHandler.swift

@@ -31,10 +31,13 @@ public typealias AckCallback = (NSArray?) -> Void
     let event:String!
     var acked = false
     var callback:AckCallback?
+    weak var socket:SocketIOClient?
+
 
-    init(event:String, ackNum:Int = 0) {
+    init(event:String, ackNum:Int = 0, socket:SocketIOClient) {
         self.ackNum = ackNum
         self.event = event
+        self.socket = socket
     }
 
     public func onAck(timeout:UInt64, withCallback callback:AckCallback) {
@@ -50,6 +53,7 @@ public typealias AckCallback = (NSArray?) -> Void
 
                 if !self!.acked {
                     self?.executeAck(["No ACK"])
+                    self?.socket?.removeAck(self!)
                 }
             }
         }

SwiftIO/SocketIOClient.swift

@@ -198,11 +198,12 @@ public class SocketIOClient: NSObject {
 
     public func emitWithAck(event:String, _ args:AnyObject...) -> SocketAckHandler {
         if !self.connected {
-            return SocketAckHandler(event: "fail")
+            return SocketAckHandler(event: "fail", socket: self)
         }
 
         self.currentAck++
-        let ackHandler = SocketAckHandler(event: event, ackNum: self.currentAck)
+        let ackHandler = SocketAckHandler(event: event,
+            ackNum: self.currentAck, socket: self)
         self.ackHandlers.append(ackHandler)
 
         dispatch_async(self.emitQueue) {[weak self] in
@@ -385,6 +386,10 @@ public class SocketIOClient: NSObject {
         }
     }
 
+    func removeAck(ack:SocketAckHandler) {
+        self.ackHandlers = self.ackHandlers.filter {$0 === ack ? false : true}
+    }
+    
     // We lost connection and should attempt to reestablish
     func tryReconnect() {
         if self.reconnectAttempts != -1 && self.currentReconnectAttempt + 1 > self.reconnectAttempts {