diff --git a/cocos/ui/UILayout.cpp b/cocos/ui/UILayout.cpp
index ded60801cd..65906378f3 100644
--- a/cocos/ui/UILayout.cpp
+++ b/cocos/ui/UILayout.cpp
@@ -465,7 +465,7 @@ void Layout::setStencilClippingSize(const Size &size)
     }
 }
     
-const Rect& Layout::getClippingRect()
+const Rect& Layout::getClippingRect() 
 {
     if (_clippingRectDirty)
     {
@@ -932,12 +932,12 @@ void Layout::requestDoLayout()
     _doLayoutDirty = true;
 }
     
-const Size Layout::getLayoutContentSize()
+const Size Layout::getLayoutContentSize()const
 {
     return this->getSize();
 }
     
-const Vector<Node*>& Layout::getLayoutElements()
+const Vector<Node*>& Layout::getLayoutElements()const
 {
     return this->getChildren();
 }
diff --git a/cocos/ui/UILayout.h b/cocos/ui/UILayout.h
index 94f1bf6c10..8f220ffb79 100644
--- a/cocos/ui/UILayout.h
+++ b/cocos/ui/UILayout.h
@@ -40,8 +40,8 @@ public:
     virtual ~LayoutProtocol(){}
     
     virtual LayoutExecutant* createLayoutExecutant() = 0;
-    virtual const Size getLayoutContentSize() = 0;
-    virtual const Vector<Node*>& getLayoutElements() = 0;
+    virtual const Size getLayoutContentSize()const = 0;
+    virtual const Vector<Node*>& getLayoutElements()const = 0;
     virtual void doLayout() = 0;
 };
 
@@ -329,8 +329,8 @@ protected:
     
     virtual void doLayout()override;
     virtual LayoutExecutant* createLayoutExecutant()override;
-    virtual const Size getLayoutContentSize()override;
-    virtual const Vector<Node*>& getLayoutElements() override;
+    virtual const Size getLayoutContentSize()const override;
+    virtual const Vector<Node*>& getLayoutElements()const override;
     
     //clipping
     void onBeforeVisitStencil();
diff --git a/cocos/ui/UILayoutParameter.h b/cocos/ui/UILayoutParameter.h
index 2760e0208b..2308799c0b 100644
--- a/cocos/ui/UILayoutParameter.h
+++ b/cocos/ui/UILayoutParameter.h
@@ -136,7 +136,7 @@ public:
     LayoutParameterProtocol(){}
     virtual ~LayoutParameterProtocol(){}
     
-    virtual LayoutParameter* getLayoutParameter() = 0;
+    virtual LayoutParameter* getLayoutParameter() const= 0;
 };
 
     
diff --git a/cocos/ui/UIScrollView.cpp b/cocos/ui/UIScrollView.cpp
index 23b8ebb34c..b560a7d14d 100644
--- a/cocos/ui/UIScrollView.cpp
+++ b/cocos/ui/UIScrollView.cpp
@@ -307,7 +307,7 @@ Node* ScrollView::getChildByTag(int tag) const
     return _innerContainer->getChildByTag(tag);
 }
     
-Widget* ScrollView::getChildByName(const std::string& name)
+Widget* ScrollView::getChildByName(const std::string& name)const
 {
     return _innerContainer->getChildByName(name);
 }
diff --git a/cocos/ui/UIScrollView.h b/cocos/ui/UIScrollView.h
index c2daeb3de1..15d4c46ec9 100644
--- a/cocos/ui/UIScrollView.h
+++ b/cocos/ui/UIScrollView.h
@@ -274,7 +274,7 @@ public:
     virtual const Vector<Node*>& getChildren() const override;
     virtual ssize_t getChildrenCount() const override;
     virtual Node * getChildByTag(int tag) const override;
-    virtual Widget* getChildByName(const std::string& name) override;
+    virtual Widget* getChildByName(const std::string& name)const override;
     
     //handle touch event
     virtual bool onTouchBegan(Touch *touch, Event *unusedEvent) override;
diff --git a/cocos/ui/UIWidget.cpp b/cocos/ui/UIWidget.cpp
index b1258e77a7..38c3b61770 100644
--- a/cocos/ui/UIWidget.cpp
+++ b/cocos/ui/UIWidget.cpp
@@ -244,7 +244,7 @@ void Widget::setEnabled(bool enabled)
     _enabled = enabled;
 }
 
-Widget* Widget::getChildByName(const std::string& name)
+Widget* Widget::getChildByName(const std::string& name)const
 {
     for (auto& child : _children)
     {
@@ -468,7 +468,7 @@ const Vec2& Widget::getSizePercent() const
     return _sizePercent;
 }
 
-Vec2 Widget::getWorldPosition()
+Vec2 Widget::getWorldPosition()const
 {
     return convertToWorldSpace(Vec2(_anchorPoint.x * _contentSize.width, _anchorPoint.y * _contentSize.height));
 }
@@ -899,8 +899,7 @@ void Widget::setPositionPercent(const Vec2 &percent)
     }
 }
 
-const Vec2& Widget::getPositionPercent()
-{
+const Vec2& Widget::getPositionPercent()const{
     return _positionPercent;
 }
 
@@ -944,17 +943,17 @@ float Widget::getTopBoundary() const
     return getBottomBoundary() + _size.height;
 }
 
-const Vec2& Widget::getTouchStartPos()
+const Vec2& Widget::getTouchStartPos()const
 {
     return _touchStartPos;
 }
 
-const Vec2& Widget::getTouchMovePos()
+const Vec2& Widget::getTouchMovePos()const
 {
     return _touchMovePos;
 }
 
-const Vec2& Widget::getTouchEndPos()
+const Vec2& Widget::getTouchEndPos()const
 {
     return _touchEndPos;
 }
@@ -980,7 +979,7 @@ void Widget::setLayoutParameter(LayoutParameter *parameter)
     _layoutParameterType = parameter->getLayoutType();
 }
 
-LayoutParameter* Widget::getLayoutParameter()
+LayoutParameter* Widget::getLayoutParameter()const
 {
     return dynamic_cast<LayoutParameter*>(_layoutParameterDictionary.at((int)_layoutParameterType));
 }
@@ -1118,7 +1117,7 @@ void Widget::setActionTag(int tag)
 	_actionTag = tag;
 }
 
-int Widget::getActionTag()
+int Widget::getActionTag()const
 {
 	return _actionTag;
 }
@@ -1137,7 +1136,7 @@ void Widget::setFocused(bool focus)
     
 }
 
-bool Widget::isFocused()
+bool Widget::isFocused()const
 {
     return _focused;
 }
@@ -1147,7 +1146,7 @@ void Widget::setFocusEnabled(bool enable)
     _focusEnabled = enable;
 }
 
-bool Widget::isFocusEnabled()
+bool Widget::isFocusEnabled()const
 {
     return _focusEnabled;
 }
@@ -1240,7 +1239,7 @@ void Widget::onFocusChange(Widget* widgetLostFocus, Widget* widgetGetFocus)
     }
 }
 
-Widget* Widget::getCurrentFocusedWidget()
+Widget* Widget::getCurrentFocusedWidget()const
 {
     return _focusedWidget;
 }
diff --git a/cocos/ui/UIWidget.h b/cocos/ui/UIWidget.h
index b730f12bd5..780b34ea1d 100644
--- a/cocos/ui/UIWidget.h
+++ b/cocos/ui/UIWidget.h
@@ -235,7 +235,7 @@ public:
      *
      * @return a Widget object whose name equals to the input parameter
      */
-    virtual Widget* getChildByName(const std::string& name);
+    virtual Widget* getChildByName(const std::string& name) const;
 
     virtual void visit(cocos2d::Renderer *renderer, const Mat4 &parentTransform, bool parentTransformUpdated) override;
 
@@ -274,7 +274,7 @@ public:
      *
      * @return The percent (x,y) of the widget in OpenGL coordinates
      */
-    const Vec2& getPositionPercent();
+    const Vec2& getPositionPercent()const;
 
     /**
      * Changes the position type of the widget
@@ -311,7 +311,7 @@ public:
      *
      * @return true if the widget is flipped horizaontally, false otherwise.
      */
-    virtual bool isFlippedX(){return _flippedX;};
+    virtual bool isFlippedX()const{return _flippedX;};
 
     /**
      * Sets whether the widget should be flipped vertically or not.
@@ -330,7 +330,7 @@ public:
      *
      * @return true if the widget is flipped vertically, flase otherwise.
      */
-    virtual bool isFlippedY(){return _flippedY;};
+    virtual bool isFlippedY()const{return _flippedY;};
     
     virtual void setColor(const Color3B& color) override;
     
@@ -363,21 +363,21 @@ public:
      *
      * @return the touch began point.
      */
-    const Vec2& getTouchStartPos();
+    const Vec2& getTouchStartPos()const;
 
     /*
      * Gets the touch move point of widget when widget is selected.
      *
      * @return the touch move point.
      */
-    const Vec2& getTouchMovePos();
+    const Vec2& getTouchMovePos()const;
 
     /*
      * Gets the touch end point of widget when widget is selected.
      *
      * @return the touch end point.
      */
-    const Vec2& getTouchEndPos();
+    const Vec2& getTouchEndPos()const;
 
     /**
      * Changes the name that is used to identify the widget easily.
@@ -487,7 +487,7 @@ public:
      *
      * @return LayoutParameter
      */
-    LayoutParameter* getLayoutParameter() override;
+    LayoutParameter* getLayoutParameter()const override;
     CC_DEPRECATED_ATTRIBUTE LayoutParameter* getLayoutParameter(LayoutParameter::Type type);
 
 
@@ -510,7 +510,7 @@ public:
      *
      * @return world position of widget.
      */
-    Vec2 getWorldPosition();
+    Vec2 getWorldPosition()const;
 
     /**
      * Gets the Virtual Renderer of widget.
@@ -547,12 +547,12 @@ public:
     
     /*temp action*/
     void setActionTag(int tag);
-	int getActionTag();
+	int getActionTag()const;
     
     /**
      *@return  whether the widget is focused or not
      */
-    bool isFocused();
+    bool isFocused()const;
     
     /**
      *@param focus  pass true to let the widget get focus or pass false to let the widget lose focus
@@ -563,7 +563,7 @@ public:
     /**
      *@return true represent the widget could accept focus, false represent the widget couldn't accept focus
      */
-    bool isFocusEnabled();
+    bool isFocusEnabled()const;
     
     /**
      *@param enable pass true/false to enable/disable the focus ability of a widget
@@ -595,7 +595,7 @@ public:
         return getCurrentFocusedWidget();
     }
 
-    Widget* getCurrentFocusedWidget();
+    Widget* getCurrentFocusedWidget()const;
     static void enableDpadNavigation(bool enable);
 
     std::function<void(Widget*,Widget*)> onFocusChanged;