fix socketio#97

Author: nuclearace

SocketIOClientSwift/SocketEngine.swift

@@ -40,11 +40,11 @@ public final class SocketEngine: NSObject, WebSocketDelegate, SocketLogClient {
     private var fastUpgrade = false
     private var forcePolling = false
     private var forceWebsockets = false
-    private var pingInterval:Int?
+    private var pingInterval:Double?
     private var pingTimer:NSTimer?
-    private var pingTimeout = 0 {
+    private var pingTimeout = 0.0 {
         didSet {
-            pongsMissedMax = pingTimeout / (pingInterval ?? 25)
+            pongsMissedMax = Int(pingTimeout / (pingInterval ?? 25))
         }
     }
     private var pongsMissed = 0
@@ -404,9 +404,9 @@ public final class SocketEngine: NSObject, WebSocketDelegate, SocketLogClient {
                     createWebsocket(andConnect: true)
                 }
 
-                if let pingInterval = json["pingInterval"] as? Int, pingTimeout = json["pingTimeout"] as? Int {
-                    self.pingInterval = pingInterval / 1000
-                    self.pingTimeout = pingTimeout / 1000
+                if let pingInterval = json["pingInterval"] as? Double, pingTimeout = json["pingTimeout"] as? Double {
+                    self.pingInterval = pingInterval / 1000.0
+                    self.pingTimeout = pingTimeout / 1000.0
                 }
         } else {
             client?.didError("Engine failed to handshake")
@@ -650,8 +650,7 @@ public final class SocketEngine: NSObject, WebSocketDelegate, SocketLogClient {
         pingTimer?.invalidate()
         dispatch_async(dispatch_get_main_queue()) {[weak self] in
             if let this = self {
-                this.pingTimer = NSTimer.scheduledTimerWithTimeInterval(NSTimeInterval(this.pingInterval!),
-                    target: this,
+                this.pingTimer = NSTimer.scheduledTimerWithTimeInterval(this.pingInterval!, target: this,
                     selector: Selector("sendPing"), userInfo: nil, repeats: true)
             }
         }