diff --git a/cocos/editor-support/cocostudio/CCActionNode.cpp b/cocos/editor-support/cocostudio/CCActionNode.cpp
index 1947eeb0bf..424b6a1498 100644
--- a/cocos/editor-support/cocostudio/CCActionNode.cpp
+++ b/cocos/editor-support/cocostudio/CCActionNode.cpp
@@ -399,7 +399,7 @@ int ActionNode::getLastFrameIndex()
 			continue;
 		}
 		bFindFrame = true;
-		int lastInex = cArray->count() - 1;
+		ssize_t lastInex = cArray->count() - 1;
 		ActionFrame* frame = (ActionFrame*)(cArray->getObjectAtIndex(lastInex));
 		int iFrameIndex = frame->getFrameIndex();
 
@@ -428,7 +428,7 @@ bool ActionNode::updateActionToTimeLine(float fTime)
 		{
 			continue;
 		}
-		int frameCount = cArray->count();
+		ssize_t frameCount = cArray->count();
 		for (int i = 0; i < frameCount; i++)
 		{
 			ActionFrame* frame = (ActionFrame*)(cArray->getObjectAtIndex(i));
diff --git a/cocos/gui/UIHelper.cpp b/cocos/gui/UIHelper.cpp
index 5385e84ce8..f71e28a086 100644
--- a/cocos/gui/UIHelper.cpp
+++ b/cocos/gui/UIHelper.cpp
@@ -37,7 +37,7 @@ UIWidget* UIHelper::seekWidgetByTag(UIWidget* root, int tag)
         return root;
     }
     cocos2d::ccArray* arrayRootChildren = root->getChildren()->data;
-    int length = arrayRootChildren->num;
+    ssize_t length = arrayRootChildren->num;
     for (int i=0;i<length;i++)
     {
         UIWidget* child = (UIWidget*)(arrayRootChildren->arr[i]);
@@ -61,7 +61,7 @@ UIWidget* UIHelper::seekWidgetByName(UIWidget* root, const char *name)
         return root;
     }
     cocos2d::ccArray* arrayRootChildren = root->getChildren()->data;
-    int length = arrayRootChildren->num;
+    ssize_t length = arrayRootChildren->num;
     for (int i=0;i<length;i++)
     {
         UIWidget* child = (UIWidget*)(arrayRootChildren->arr[i]);
@@ -81,7 +81,7 @@ UIWidget* UIHelper::seekWidgetByRelativeName(UIWidget *root, const char *name)
         return nullptr;
     }
     cocos2d::ccArray* arrayRootChildren = root->getChildren()->data;
-    int length = arrayRootChildren->num;
+    ssize_t length = arrayRootChildren->num;
     for (int i=0;i<length;i++)
     {
         UIWidget* child = (UIWidget*)(arrayRootChildren->arr[i]);
@@ -106,7 +106,7 @@ UIWidget* UIHelper::seekActionWidgetByActionTag(UIWidget* root, int tag)
 		return root;
 	}
     cocos2d::ccArray* arrayRootChildren = root->getChildren()->data;
-    int length = arrayRootChildren->num;
+    ssize_t length = arrayRootChildren->num;
 	for (int i=0;i<length;i++)
 	{
 		UIWidget* child = (UIWidget*)(arrayRootChildren->arr[i]);
diff --git a/cocos/gui/UIInputManager.cpp b/cocos/gui/UIInputManager.cpp
index 04aac38a82..a8cd486f61 100644
--- a/cocos/gui/UIInputManager.cpp
+++ b/cocos/gui/UIInputManager.cpp
@@ -71,8 +71,8 @@ void UIInputManager::registWidget(UIWidget* widget)
 bool UIInputManager::checkTouchEvent(UIWidget *root, const Point &touchPoint)
 {
     ccArray* arrayRootChildren = root->getChildren()->data;
-    int length = arrayRootChildren->num;
-    for (int i=length-1; i >= 0; i--)
+    ssize_t length = arrayRootChildren->num;
+    for (ssize_t i=length-1; i >= 0; i--)
     {
         UIWidget* widget = (UIWidget*)(arrayRootChildren->arr[i]);
         if (checkTouchEvent(widget, touchPoint))
@@ -130,7 +130,7 @@ void UIInputManager::update(float dt)
         }
     }
     ccArray* arrayWidget = _checkedDoubleClickWidget->data;
-    int widgetCount = arrayWidget->num;
+    ssize_t widgetCount = arrayWidget->num;
     for (int i=0;i<widgetCount;i++)
     {
         UIWidget* widget = (UIWidget*)(arrayWidget->arr[i]);
@@ -173,7 +173,7 @@ void UIInputManager::onTouchEnd(Touch* touch)
     _touchEndedPoint.x = touch->getLocation().x;
     _touchEndedPoint.y = touch->getLocation().y;
     ccArray* selectedWidgetArray = _selectedWidgets->data;
-    int length = selectedWidgetArray->num;
+    ssize_t length = selectedWidgetArray->num;
     for (int i=0; i<length; ++i)
     {
         UIWidget* hitWidget = (UIWidget*)(selectedWidgetArray->arr[0]);
@@ -188,7 +188,7 @@ void UIInputManager::onTouchCancelled(Touch* touch)
     _touchEndedPoint.x = touch->getLocation().x;
     _touchEndedPoint.y = touch->getLocation().y;
     ccArray* selectedWidgetArray = _selectedWidgets->data;
-    int length = selectedWidgetArray->num;
+    ssize_t length = selectedWidgetArray->num;
     for (int i=0; i<length; ++i)
     {
         UIWidget* hitWidget = (UIWidget*)(selectedWidgetArray->arr[0]);
diff --git a/cocos/gui/UILayout.cpp b/cocos/gui/UILayout.cpp
index 68d686eb1e..578667ff93 100644
--- a/cocos/gui/UILayout.cpp
+++ b/cocos/gui/UILayout.cpp
@@ -128,7 +128,7 @@ void UILayout::onSizeChanged()
     if (strcmp(getDescription(), "Layout") == 0)
     {
         cocos2d::ccArray* arrayChildren = _children->data;
-        int length = arrayChildren->num;
+        ssize_t length = arrayChildren->num;
         for (int i=0; i<length; ++i)
         {
             UIWidget* child = (UIWidget*)arrayChildren->arr[i];
@@ -452,7 +452,7 @@ void UILayout::setLayoutType(LayoutType type)
     _layoutType = type;
 
     cocos2d::ccArray* layoutChildrenArray = getChildren()->data;
-    int length = layoutChildrenArray->num;
+    ssize_t length = layoutChildrenArray->num;
     for (int i=0; i<length; i++)
     {
         UIWidget* child = dynamic_cast<UIWidget*>(layoutChildrenArray->arr[i]);
@@ -474,7 +474,7 @@ void UILayout::doLayout()
         case LAYOUT_LINEAR_VERTICAL:
         {
             cocos2d::ccArray* layoutChildrenArray = getChildren()->data;
-            int length = layoutChildrenArray->num;
+            ssize_t length = layoutChildrenArray->num;
             cocos2d::Size layoutSize = getSize();
             float topBoundary = layoutSize.height;
             for (int i=0; i<length; ++i)
@@ -515,7 +515,7 @@ void UILayout::doLayout()
         case LAYOUT_LINEAR_HORIZONTAL:
         {
             cocos2d::ccArray* layoutChildrenArray = getChildren()->data;
-            int length = layoutChildrenArray->num;
+            ssize_t length = layoutChildrenArray->num;
             cocos2d::Size layoutSize = getSize();
             float leftBoundary = 0.0f;
             for (int i=0; i<length; ++i)
@@ -556,8 +556,8 @@ void UILayout::doLayout()
         case LAYOUT_RELATIVE:
         {
             cocos2d::ccArray* layoutChildrenArray = getChildren()->data;
-            int length = layoutChildrenArray->num;
-            int unlayoutChildCount = length;
+            ssize_t length, unlayoutChildCount;
+            length = unlayoutChildCount = layoutChildrenArray->num;
             cocos2d::Size layoutSize = getSize();
             
             for (int i=0; i<length; i++)
diff --git a/cocos/gui/UIListView.cpp b/cocos/gui/UIListView.cpp
index 8e45662c3e..6512f75bc3 100644
--- a/cocos/gui/UIListView.cpp
+++ b/cocos/gui/UIListView.cpp
@@ -92,7 +92,7 @@ void UIListView::updateInnerContainerSize()
     switch (_direction) {
         case SCROLLVIEW_DIR_VERTICAL:
         {
-            int childrenCount = _items->count();
+            ssize_t childrenCount = _items->count();
             float totalHeight = _model->getSize().height * childrenCount + (childrenCount - 1) * _itemsMargin;
             float finalWidth = _size.width;
             float finalHeight = totalHeight;
@@ -101,7 +101,7 @@ void UIListView::updateInnerContainerSize()
         }
         case SCROLLVIEW_DIR_HORIZONTAL:
         {
-            int childrenCount = _items->count();
+            ssize_t childrenCount = _items->count();
             float totalWidth = _model->getSize().width * childrenCount + (childrenCount - 1) * _itemsMargin;
             float finalWidth = totalWidth;
             float finalHeight = _size.height;
@@ -373,7 +373,7 @@ void UIListView::refreshView()
         return;
     }
     cocos2d::ccArray* arrayItems = _items->data;
-    int length = arrayItems->num;
+    ssize_t length = arrayItems->num;
     for (int i=0; i<length; i++)
     {
         UIWidget* item = (UIWidget*)(arrayItems->arr[i]);
diff --git a/cocos/gui/UIPageView.cpp b/cocos/gui/UIPageView.cpp
index c6c51ae381..a3693a9bf4 100644
--- a/cocos/gui/UIPageView.cpp
+++ b/cocos/gui/UIPageView.cpp
@@ -91,7 +91,7 @@ void UIPageView::addWidgetToPage(UIWidget *widget, int pageIdx, bool forceCreate
     {
         return;
     }
-    int pageCount = _pages->count();
+    ssize_t pageCount = _pages->count();
     if (pageIdx < 0 || pageIdx >= pageCount)
     {
         if (forceCreate)
@@ -168,7 +168,7 @@ void UIPageView::insertPage(UILayout* page, int idx)
         return;
     }
     
-    int pageCount = _pages->count();
+    ssize_t pageCount = _pages->count();
     if (idx >= pageCount)
     {
         addPage(page);
@@ -186,7 +186,7 @@ void UIPageView::insertPage(UILayout* page, int idx)
             page->setSize(pvSize);
         }
         cocos2d::ccArray* arrayPages = _pages->data;
-        int length = arrayPages->num;
+        ssize_t length = arrayPages->num;
         for (int i=(idx+1); i<length; i++) {
             UIWidget* behindPage = dynamic_cast<UIWidget*>(arrayPages->arr[i]);
             cocos2d::Point formerPos = behindPage->getPosition();
@@ -286,7 +286,7 @@ void UIPageView::updateChildrenPosition()
         return;
     }
     
-    int pageCount = _pages->data->num;
+    ssize_t pageCount = _pages->data->num;
     if (pageCount <= 0)
     {
         _curPageIdx = 0;
@@ -411,7 +411,7 @@ void UIPageView::onTouchEnded(const cocos2d::Point &touchPoint)
 void UIPageView::movePages(float offset)
 {
     cocos2d::ccArray* arrayPages = _pages->data;
-    int length = arrayPages->num;
+    ssize_t length = arrayPages->num;
     for (int i = 0; i < length; i++)
     {
         UIWidget* child = (UIWidget*)(arrayPages->arr[i]);
@@ -502,7 +502,7 @@ void UIPageView::handleReleaseLogic(const cocos2d::Point &touchPoint)
     if (curPage)
     {
         cocos2d::Point curPagePos = curPage->getPosition();
-        int pageCount = _pages->count();
+        ssize_t pageCount = _pages->count();
         float curPageLocation = curPagePos.x;
         float pageWidth = getSize().width;
         float boundary = pageWidth/2.0f;
@@ -613,7 +613,7 @@ UIWidget* UIPageView::createCloneInstance()
 void UIPageView::copyClonedWidgetChildren(UIWidget* model)
 {
     cocos2d::ccArray* arrayPages = dynamic_cast<UIPageView*>(model)->getPages()->data;
-    int length = arrayPages->num;
+    ssize_t length = arrayPages->num;
     for (int i=0; i<length; i++)
     {
         UILayout* page = (UILayout*)(arrayPages->arr[i]);
diff --git a/cocos/gui/UIWidget.cpp b/cocos/gui/UIWidget.cpp
index 8db95af192..38ea49a08f 100644
--- a/cocos/gui/UIWidget.cpp
+++ b/cocos/gui/UIWidget.cpp
@@ -149,7 +149,7 @@ bool UIWidget::addChild(UIWidget *child)
         return false;
     }
     child->setParent(this);
-    int childrenCount = _children->data->num;
+    ssize_t childrenCount = _children->data->num;
     if (childrenCount <= 0)
     {
         _children->addObject(child);
@@ -158,7 +158,7 @@ bool UIWidget::addChild(UIWidget *child)
     {
         bool seekSucceed = false;
         cocos2d::ccArray* arrayChildren = _children->data;
-        for (int i=childrenCount-1; i>=0; --i)
+        for (ssize_t i=childrenCount-1; i>=0; --i)
         {
             UIWidget* widget = (UIWidget*)(arrayChildren->arr[i]);
             if (child->getZOrder() >= widget->getZOrder())
@@ -226,7 +226,7 @@ void UIWidget::removeAllChildren()
     {
         return;
     }
-    int times = _children->data->num;
+    ssize_t times = _children->data->num;
     for (int i=0; i<times; ++i)
     {
         UIWidget* lastChild = (UIWidget*)(_children->getLastObject());
@@ -238,7 +238,7 @@ void UIWidget::reorderChild(UIWidget* child)
 {
     CC_SAFE_RETAIN(child);
     _children->removeObject(child);
-    int childrenCount = _children->data->num;
+    ssize_t childrenCount = _children->data->num;
     if (childrenCount <= 0)
     {
         _children->addObject(child);
@@ -247,7 +247,7 @@ void UIWidget::reorderChild(UIWidget* child)
     {
         bool seekSucceed = false;
         cocos2d::ccArray* arrayChildren = _children->data;
-        for (int i=childrenCount-1; i>=0; --i)
+        for (ssize_t i=childrenCount-1; i>=0; --i)
         {
             UIWidget* widget = (UIWidget*)(arrayChildren->arr[i]);
             if (child->getZOrder() >= widget->getZOrder())
@@ -287,7 +287,7 @@ void UIWidget::setEnabled(bool enabled)
         dynamic_cast<UIRectClippingNode*>(_renderer)->setEnabled(enabled);
     }
     cocos2d::ccArray* arrayChildren = _children->data;
-    int childrenCount = arrayChildren->num;
+    ssize_t childrenCount = arrayChildren->num;
     for (int i = 0; i < childrenCount; i++)
     {
         UIWidget* child = dynamic_cast<UIWidget*>(arrayChildren->arr[i]);
@@ -1166,7 +1166,7 @@ UIWidget* UIWidget::createCloneInstance()
 void UIWidget::copyClonedWidgetChildren(UIWidget* model)
 {
     cocos2d::ccArray* arrayWidgetChildren = model->getChildren()->data;
-    int length = arrayWidgetChildren->num;
+    ssize_t length = arrayWidgetChildren->num;
     for (int i=0; i<length; i++)
     {
         UIWidget* child = (UIWidget*)(arrayWidgetChildren->arr[i]);
diff --git a/samples/Cpp/TestCpp/Classes/ExtensionsTest/CocoStudioArmatureTest/ArmatureScene.cpp b/samples/Cpp/TestCpp/Classes/ExtensionsTest/CocoStudioArmatureTest/ArmatureScene.cpp
index 059313e410..37f6f0e7ba 100644
--- a/samples/Cpp/TestCpp/Classes/ExtensionsTest/CocoStudioArmatureTest/ArmatureScene.cpp
+++ b/samples/Cpp/TestCpp/Classes/ExtensionsTest/CocoStudioArmatureTest/ArmatureScene.cpp
@@ -1428,9 +1428,6 @@ void TestEasing::updateSubTitle()
     label->setString(str.c_str());
 }
 
-
-
-
 void TestChangeAnimationInternal::onEnter()
 {
     ArmatureTestLayer::onEnter();
@@ -1451,11 +1448,11 @@ void TestChangeAnimationInternal::onExit()
 {
     Director::getInstance()->setAnimationInterval(1/60.0f);
 }
-std::string TestChangeAnimationInternal::title()
+std::string TestChangeAnimationInternal::title() const
 {
     return "Test change animation internal";
 }
-std::string TestChangeAnimationInternal::subtitle()
+std::string TestChangeAnimationInternal::subtitle() const
 {
     return "Touch to change animation internal";
 }
diff --git a/samples/Cpp/TestCpp/Classes/ExtensionsTest/CocoStudioArmatureTest/ArmatureScene.h b/samples/Cpp/TestCpp/Classes/ExtensionsTest/CocoStudioArmatureTest/ArmatureScene.h
index b118589f64..933a1edf59 100644
--- a/samples/Cpp/TestCpp/Classes/ExtensionsTest/CocoStudioArmatureTest/ArmatureScene.h
+++ b/samples/Cpp/TestCpp/Classes/ExtensionsTest/CocoStudioArmatureTest/ArmatureScene.h
@@ -362,7 +362,7 @@ public:
 class TestEasing : public ArmatureTestLayer
 {      
 public:
-    virtual void onEnter();
+    virtual void onEnter() override;
     virtual std::string title() const override;
     virtual std::string subtitle() const override;
 
@@ -376,10 +376,10 @@ public:
 class TestChangeAnimationInternal : public ArmatureTestLayer
 {
 public:
-    virtual void onEnter();
-    virtual void onExit();
-    virtual std::string title();
-    virtual std::string subtitle();
+    virtual void onEnter()override;
+    virtual void onExit() override;
+    virtual std::string title() const override;
+    virtual std::string subtitle() const override;
 
     void onTouchesEnded(const std::vector<Touch*>& touches, Event* event);
 };
diff --git a/samples/Cpp/TestCpp/Classes/LayerTest/LayerTest.cpp b/samples/Cpp/TestCpp/Classes/LayerTest/LayerTest.cpp
index 88639a5399..9467a3cf39 100644
--- a/samples/Cpp/TestCpp/Classes/LayerTest/LayerTest.cpp
+++ b/samples/Cpp/TestCpp/Classes/LayerTest/LayerTest.cpp
@@ -899,12 +899,12 @@ void LayerBug3162A::step(float dt)
     _layer[0]->setCascadeOpacityEnabled(!_layer[0]->isCascadeOpacityEnabled());
 }
 
-std::string LayerBug3162A::title()
+std::string LayerBug3162A::title() const
 {
     return "Bug 3162 red layer cascade opacity eable/disable";
 }
 
-std::string LayerBug3162A::subtitle()
+std::string LayerBug3162A::subtitle() const
 {
     return "g and b layer opacity is effected/diseffected with r layer";
 }
@@ -945,12 +945,12 @@ void LayerBug3162B::step(float dt)
     _layer[0]->setCascadeColorEnabled(!_layer[0]->isCascadeColorEnabled());
 }
 
-std::string LayerBug3162B::title()
+std::string LayerBug3162B::title() const
 {
     return "Bug 3162 bottom layer cascade color eable/disable";
 }
 
-std::string LayerBug3162B::subtitle()
+std::string LayerBug3162B::subtitle() const
 {
     return "u and m layer color is effected/diseffected with b layer";
 }
diff --git a/samples/Cpp/TestCpp/Classes/LayerTest/LayerTest.h b/samples/Cpp/TestCpp/Classes/LayerTest/LayerTest.h
index b1b41c1a20..61a8602200 100644
--- a/samples/Cpp/TestCpp/Classes/LayerTest/LayerTest.h
+++ b/samples/Cpp/TestCpp/Classes/LayerTest/LayerTest.h
@@ -178,9 +178,9 @@ class LayerBug3162A : public LayerTest
 {
 public:
     CREATE_FUNC(LayerBug3162A);
-    virtual void onEnter();
-    virtual std::string title();
-    virtual std::string subtitle();
+    virtual void onEnter() override;
+    virtual std::string title() const override;
+    virtual std::string subtitle() const override;
     
     void step(float dt);
     
@@ -192,9 +192,9 @@ class LayerBug3162B : public LayerTest
 {
 public:
     CREATE_FUNC(LayerBug3162B);
-    virtual void onEnter();
-    virtual std::string title();
-    virtual std::string subtitle();
+    virtual void onEnter() override;
+    virtual std::string title() const override;
+    virtual std::string subtitle() const override;
     
     void step(float dt);
     
diff --git a/samples/Cpp/TestCpp/Classes/ParticleTest/ParticleTest.h b/samples/Cpp/TestCpp/Classes/ParticleTest/ParticleTest.h
index 86801dc30b..2bf2f530a2 100644
--- a/samples/Cpp/TestCpp/Classes/ParticleTest/ParticleTest.h
+++ b/samples/Cpp/TestCpp/Classes/ParticleTest/ParticleTest.h
@@ -162,7 +162,7 @@ public:
         _title = file;
     }
     virtual void onEnter();
-    virtual std::string title()
+    virtual std::string title() const override
     {
         return _title;
     }