diff --git a/cocos/gui/UIHelper.cpp b/cocos/gui/UIHelper.cpp
index 814a4bdf53..2d9264cb4a 100644
--- a/cocos/gui/UIHelper.cpp
+++ b/cocos/gui/UIHelper.cpp
@@ -38,7 +38,7 @@ Widget* UIHelper::seekWidgetByTag(Widget* root, int tag)
     {
         return root;
     }
-    Vector<Node*> arrayRootChildren = root->getChildren();
+    const auto& arrayRootChildren = root->getChildren();
     int length = arrayRootChildren.size();
     for (int i=0;i<length;i++)
     {
@@ -62,11 +62,10 @@ Widget* UIHelper::seekWidgetByName(Widget* root, const char *name)
     {
         return root;
     }
-    Vector<Node*> arrayRootChildren = root->getChildren();
-    int length = arrayRootChildren.size();
-    for (int i=0;i<length;i++)
+    const auto& arrayRootChildren = root->getChildren();
+    for (auto& subWidget : arrayRootChildren)
     {
-        Widget* child = static_cast<Widget*>(arrayRootChildren.at(i));
+        Widget* child = static_cast<Widget*>(subWidget);
         Widget* res = seekWidgetByName(child,name);
         if (res != nullptr)
         {
@@ -82,11 +81,10 @@ Widget* UIHelper::seekWidgetByRelativeName(Widget *root, const char *name)
     {
         return nullptr;
     }
-    Vector<Node*> arrayRootChildren = root->getChildren();
-    int length = arrayRootChildren.size();
-    for (int i=0;i<length;i++)
+    const auto& arrayRootChildren = root->getChildren();
+    for (auto& subWidget : arrayRootChildren)
     {
-        Widget* child = static_cast<Widget*>(arrayRootChildren.at(i));
+        Widget* child = static_cast<Widget*>(subWidget);
         RelativeLayoutParameter* layoutParameter = dynamic_cast<RelativeLayoutParameter*>(child->getLayoutParameter(LAYOUT_PARAMETER_RELATIVE));
         if (layoutParameter && strcmp(layoutParameter->getRelativeName(), name) == 0)
         {
@@ -107,11 +105,10 @@ Widget* UIHelper::seekActionWidgetByActionTag(Widget* root, int tag)
 	{
 		return root;
 	}
-    Vector<Node*> arrayRootChildren = root->getChildren();
-    int length = arrayRootChildren.size();
-	for (int i=0;i<length;i++)
+    const auto& arrayRootChildren = root->getChildren();
+    for (auto& subWidget : arrayRootChildren)
 	{
-		Widget* child = static_cast<Widget*>(arrayRootChildren.at(i));
+		Widget* child = static_cast<Widget*>(subWidget);
 		Widget* res = seekActionWidgetByActionTag(child,tag);
 		if (res != nullptr)
 		{
diff --git a/cocos/gui/UILayout.cpp b/cocos/gui/UILayout.cpp
index 29031e2a29..f63ddb2c0d 100644
--- a/cocos/gui/UILayout.cpp
+++ b/cocos/gui/UILayout.cpp
@@ -727,12 +727,12 @@ void Layout::doLayout()
             break;
         case LAYOUT_LINEAR_VERTICAL:
         {
-            int length = _widgetChildren.size();
             Size layoutSize = getSize();
             float topBoundary = layoutSize.height;
-            for (int i=0; i<length; ++i)
+            
+            for (auto& subWidget : _widgetChildren)
             {
-                Widget* child = static_cast<Widget*>(_widgetChildren.at(i));
+                Widget* child = static_cast<Widget*>(subWidget);
                 LinearLayoutParameter* layoutParameter = dynamic_cast<LinearLayoutParameter*>(child->getLayoutParameter(LAYOUT_PARAMETER_LINEAR));
                 
                 if (layoutParameter)
@@ -767,12 +767,11 @@ void Layout::doLayout()
         }
         case LAYOUT_LINEAR_HORIZONTAL:
         {
-            int length = _widgetChildren.size();
             Size layoutSize = getSize();
             float leftBoundary = 0.0f;
-            for (int i=0; i<length; ++i)
+            for (auto& subWidget : _widgetChildren)
             {
-                Widget* child = static_cast<Widget*>(_widgetChildren.at(i));
+                Widget* child = static_cast<Widget*>(subWidget);
                 LinearLayoutParameter* layoutParameter = dynamic_cast<LinearLayoutParameter*>(child->getLayoutParameter(LAYOUT_PARAMETER_LINEAR));
                 
                 if (layoutParameter)
@@ -807,22 +806,19 @@ void Layout::doLayout()
         }
         case LAYOUT_RELATIVE:
         {
-            int length = _widgetChildren.size();
-            int unlayoutChildCount = length;
+            int unlayoutChildCount = _widgetChildren.size();
             Size layoutSize = getSize();
-            
-            for (int i=0; i<length; i++)
+            for (auto& subWidget : _widgetChildren)
             {
-                Widget* child = static_cast<Widget*>(_widgetChildren.at(i));
+                Widget* child = static_cast<Widget*>(subWidget);
                 RelativeLayoutParameter* layoutParameter = dynamic_cast<RelativeLayoutParameter*>(child->getLayoutParameter(LAYOUT_PARAMETER_RELATIVE));
                 layoutParameter->_put = false;
             }
-            
             while (unlayoutChildCount > 0)
             {
-                for (int i=0; i<length; i++)
+                for (auto& subWidget : _widgetChildren)
                 {
-                    Widget* child = static_cast<Widget*>(_widgetChildren.at(i));
+                    Widget* child = static_cast<Widget*>(subWidget);
                     RelativeLayoutParameter* layoutParameter = dynamic_cast<RelativeLayoutParameter*>(child->getLayoutParameter(LAYOUT_PARAMETER_RELATIVE));
                     
                     if (layoutParameter)
diff --git a/cocos/gui/UIListView.cpp b/cocos/gui/UIListView.cpp
index a6cedbb287..5d608ac6dc 100644
--- a/cocos/gui/UIListView.cpp
+++ b/cocos/gui/UIListView.cpp
@@ -90,9 +90,8 @@ void ListView::updateInnerContainerSize()
         {
             int length = _items.size();
             float totalHeight = (length - 1) * _itemsMargin;
-            for (int i=0; i<length; i++)
+            for (auto& item : _items)
             {
-                Widget* item = _items.at(i);
                 totalHeight += item->getSize().height;
             }
             float finalWidth = _size.width;
@@ -104,9 +103,8 @@ void ListView::updateInnerContainerSize()
         {
             int length = _items.size();
             float totalWidth = (length - 1) * _itemsMargin;
-            for (int i=0; i<length; i++)
+            for (auto& item : _items)
             {
-                Widget* item = _items.at(i);
                 totalWidth += item->getSize().width;
             }
             float finalWidth = totalWidth;
@@ -446,12 +444,9 @@ Widget* ListView::createCloneInstance()
 
 void ListView::copyClonedWidgetChildren(Widget* model)
 {
-    Vector<Widget*> arrayItems = getItems();
-    
-    int length = arrayItems.size();
-    for (int i=0; i<length; i++)
+    auto& arrayItems = getItems();
+    for (auto& item : arrayItems)
     {
-        Widget* item = arrayItems.at(i);
         pushBackCustomItem(item->clone());
     }
 }
diff --git a/cocos/gui/UIPageView.cpp b/cocos/gui/UIPageView.cpp
index 784fc31b8f..dcc0dbf593 100644
--- a/cocos/gui/UIPageView.cpp
+++ b/cocos/gui/UIPageView.cpp
@@ -181,7 +181,7 @@ void PageView::insertPage(Layout* page, int idx)
             page->setSize(pvSize);
         }
         int length = _pages.size();
-        for (int i=(idx+1); i<length; i++) {
+        for (int i=(idx+1); i<length; i++){
             Widget* behindPage = _pages.at(i);
             Point formerPos = behindPage->getPosition();
             behindPage->setPosition(Point(formerPos.x+getSize().width, 0));
@@ -268,10 +268,8 @@ void PageView::onSizeChanged()
 void PageView::updateChildrenSize()
 {
     Size selfSize = getSize();
-    int length = _pages.size();
-    for (long i=0; i<length; i++)
+    for (auto& page : _pages)
     {
-        Layout* page = _pages.at(i);
         page->setSize(selfSize);
     }
 }
@@ -410,13 +408,11 @@ void PageView::onTouchCancelled(Touch *touch, Event *unusedEvent)
 
 void PageView::movePages(float offset)
 {
-    int length = _pages.size();
-    for (int i = 0; i < length; i++)
+    for (auto& page : _pages)
     {
-        Widget* child = _pages.at(i);
-        _movePagePoint.x = child->getPosition().x + offset;
-        _movePagePoint.y = child->getPosition().y;
-        child->setPosition(_movePagePoint);
+        _movePagePoint.x = page->getPosition().x + offset;
+        _movePagePoint.y = page->getPosition().y;
+        page->setPosition(_movePagePoint);
     }
 }
 
@@ -606,11 +602,9 @@ Widget* PageView::createCloneInstance()
 
 void PageView::copyClonedWidgetChildren(Widget* model)
 {
-    Vector<Layout*> modelPages = dynamic_cast<PageView*>(model)->getPages();
-    int length = modelPages.size();
-    for (int i=0; i<length; i++)
+    auto& modelPages = dynamic_cast<PageView*>(model)->getPages();
+    for (auto& page : modelPages)
     {
-        Layout* page = modelPages.at(i);
         addPage(dynamic_cast<Layout*>(page->clone()));
     }
 }
diff --git a/cocos/gui/UIWidget.cpp b/cocos/gui/UIWidget.cpp
index 58b3284119..495821cd99 100644
--- a/cocos/gui/UIWidget.cpp
+++ b/cocos/gui/UIWidget.cpp
@@ -977,10 +977,11 @@ Widget* Widget::createCloneInstance()
 
 void Widget::copyClonedWidgetChildren(Widget* model)
 {
-    int length = model->getChildren().size();
-    for (int i=0; i<length; i++)
+    auto& modelChildren = model->getChildren();
+    
+    for (auto& subWidget : modelChildren)
     {
-        Widget* child = static_cast<Widget*>(model->getChildren().at(i));
+        Widget* child = static_cast<Widget*>(subWidget);
         addChild(child->clone());
     }
 }