Merge pull request #2351 from dumganhar/v1.8-release

Fixed that we forget to observe onTouchCancelled event.

cocos2d/core/CCNode.js

@@ -204,6 +204,23 @@ var _touchEndHandler = function (touch, event) {
         Event.EventTouch.pool.put(event);
     }
 };
+var _touchCancelHandler = function (touch, event) {
+    if (CC_JSB) {
+        event = Event.EventTouch.pool.get(event);
+    }
+    var pos = touch.getLocation();
+    var node = this.owner;
+
+    event.type = EventType.TOUCH_CANCEL;
+    event.touch = touch;
+    event.bubbles = true;
+    node.dispatchEvent(event);
+    if (CC_JSB) {
+        event.touch = null;
+        event._touches = null;
+        Event.EventTouch.pool.put(event);
+    }
+};
 
 var _mouseDownHandler = function (event) {
     var pos = event.getLocation();
@@ -1191,7 +1208,8 @@ var Node = cc.Class({
                     mask: _searchMaskInParent(this),
                     onTouchBegan: _touchStartHandler,
                     onTouchMoved: _touchMoveHandler,
-                    onTouchEnded: _touchEndHandler
+                    onTouchEnded: _touchEndHandler,
+                    onTouchCancelled: _touchCancelHandler
                 });
                 if (CC_JSB) {
                     this._touchListener.retain();