diff --git a/cocos/ui/UIRadioButton.cpp b/cocos/ui/UIRadioButton.cpp
index 7fe4851baf..a7d0abccde 100644
--- a/cocos/ui/UIRadioButton.cpp
+++ b/cocos/ui/UIRadioButton.cpp
@@ -149,7 +149,7 @@ void RadioButton::copySpecialProperties(Widget *widget)
         AbstractCheckButton::copySpecialProperties(widget);
         _radioButtonEventCallback = radioButton->_radioButtonEventCallback;
         _ccEventCallback = radioButton->_ccEventCallback;
-		_group = radioButton->_group;
+        _group = radioButton->_group;
     }
 }
 
@@ -164,7 +164,7 @@ RadioButtonGroup::~RadioButtonGroup()
 {
     _radioButtonGroupEventCallback = nullptr;
     _selectedRadioButton = nullptr;
-	_radioButtons.clear();
+    _radioButtons.clear();
 }
 
 RadioButtonGroup* RadioButtonGroup::create()
@@ -189,7 +189,7 @@ void RadioButtonGroup::addRadioButton(RadioButton* radioButton)
     if(radioButton != nullptr)
     {
         radioButton->_group = this;
-		_radioButtons.pushBack(radioButton);
+        _radioButtons.pushBack(radioButton);
         
         if(!_allowedNoSelection && _selectedRadioButton == nullptr)
         {
@@ -200,13 +200,13 @@ void RadioButtonGroup::addRadioButton(RadioButton* radioButton)
 
 void RadioButtonGroup::removeRadioButton(RadioButton* radioButton)
 {
-	ssize_t index = _radioButtons.getIndex(radioButton);
-	if( index == CC_INVALID_INDEX )
-	{
-		CCLOGERROR("The radio button does not belong to this group!");
-		return;
-	}
-	
+    ssize_t index = _radioButtons.getIndex(radioButton);
+    if( index == CC_INVALID_INDEX )
+    {
+        CCLOGERROR("The radio button does not belong to this group!");
+        return;
+    }
+    
     if(radioButton != nullptr)
     {
         radioButton->_group = nullptr;
@@ -214,28 +214,28 @@ void RadioButtonGroup::removeRadioButton(RadioButton* radioButton)
         {
             deselect();
         }
-		_radioButtons.erase(index);
-		
-		if(!_allowedNoSelection && _selectedRadioButton == nullptr && !_radioButtons.empty())
-		{
-			setSelectedButton(0);
-		}
+        _radioButtons.erase(index);
+        
+        if(!_allowedNoSelection && _selectedRadioButton == nullptr && !_radioButtons.empty())
+        {
+            setSelectedButton(0);
+        }
     }
 }
 
 ssize_t RadioButtonGroup::getNumberOfRadioButtons() const
 {
-	return _radioButtons.size();
+    return _radioButtons.size();
 }
 
 RadioButton* RadioButtonGroup::getRadioButtonByIndex(int index) const
 {
-	if(index >= _radioButtons.size())
-	{
-		CCLOGERROR("Out of array index! length=%d, requestedIndex=%d", (int)_radioButtons.size(), index);
-		return nullptr;
-	}
-	return _radioButtons.at(index);
+    if(index >= _radioButtons.size())
+    {
+        CCLOGERROR("Out of array index! length=%d, requestedIndex=%d", (int)_radioButtons.size(), index);
+        return nullptr;
+    }
+    return _radioButtons.at(index);
 }
 
 void RadioButtonGroup::deselect()
@@ -306,14 +306,14 @@ void RadioButtonGroup::copySpecialProperties(Widget *widget)
     {
         _radioButtonGroupEventCallback = radioButtonGroup->_radioButtonGroupEventCallback;
         _ccEventCallback = radioButtonGroup->_ccEventCallback;
-		_selectedRadioButton = radioButtonGroup->_selectedRadioButton;
-		_allowedNoSelection = radioButtonGroup->_allowedNoSelection;
-		
-		_radioButtons.clear();
-		for(const auto& radioButton : radioButtonGroup->_radioButtons)
-		{
-			_radioButtons.pushBack(radioButton);
-		}
+        _selectedRadioButton = radioButtonGroup->_selectedRadioButton;
+        _allowedNoSelection = radioButtonGroup->_allowedNoSelection;
+        
+        _radioButtons.clear();
+        for(const auto& radioButton : radioButtonGroup->_radioButtons)
+        {
+            _radioButtons.pushBack(radioButton);
+        }
     }
 }
 
diff --git a/cocos/ui/UIRadioButton.h b/cocos/ui/UIRadioButton.h
index 808894232d..069ec91575 100644
--- a/cocos/ui/UIRadioButton.h
+++ b/cocos/ui/UIRadioButton.h
@@ -182,9 +182,9 @@ public:
     
     virtual void addRadioButton(RadioButton* radioButton);
     virtual void removeRadioButton(RadioButton* radioButton);
-	
-	ssize_t getNumberOfRadioButtons() const;
-	RadioButton* getRadioButtonByIndex(int index) const;
+    
+    ssize_t getNumberOfRadioButtons() const;
+    RadioButton* getRadioButtonByIndex(int index) const;
     
     void setAllowedNoSelection(bool allowedNoSelection);
     bool isAllowedNoSelection() const;
@@ -197,8 +197,8 @@ protected:
     
     void onChangedRadioButtonSelect(RadioButton* radioButton);
     void deselect();
-	
-	Vector<RadioButton*> _radioButtons;
+    
+    Vector<RadioButton*> _radioButtons;
     ccRadioButtonGroupCallback _radioButtonGroupEventCallback;
     RadioButton* _selectedRadioButton;
     bool _allowedNoSelection;
diff --git a/tests/cpp-tests/Classes/UITest/CocoStudioGUITest/UIRadioButtonTest/UIRadioButtonTest.cpp b/tests/cpp-tests/Classes/UITest/CocoStudioGUITest/UIRadioButtonTest/UIRadioButtonTest.cpp
index aacab007e9..00d46b8ea5 100644
--- a/tests/cpp-tests/Classes/UITest/CocoStudioGUITest/UIRadioButtonTest/UIRadioButtonTest.cpp
+++ b/tests/cpp-tests/Classes/UITest/CocoStudioGUITest/UIRadioButtonTest/UIRadioButtonTest.cpp
@@ -5,9 +5,9 @@ using namespace cocos2d::ui;
 
 UIRadioButtonTests::UIRadioButtonTests()
 {
-	ADD_TEST_CASE(UIRadioButtonTest);
-	ADD_TEST_CASE(UIRadioButtonTwoGroupsTest);
-	ADD_TEST_CASE(UIRadioButtonTabTest);
+    ADD_TEST_CASE(UIRadioButtonTest);
+    ADD_TEST_CASE(UIRadioButtonTwoGroupsTest);
+    ADD_TEST_CASE(UIRadioButtonTabTest);
 }
 
 
@@ -26,93 +26,93 @@ static float startPosX = 0;
 
 bool UIRadioButtonTest::init()
 {
-	if (UIScene::init())
-	{
-		Size widgetSize = _widget->getContentSize();
-		
-		// Create a radio button group
-		_radioButtonGroup = RadioButtonGroup::create();
-		_uiLayer->addChild(_radioButtonGroup);
-		
-		// Create the radio buttons
-		static const int NUMBER_OF_BUTTONS = 5;
-		startPosX = widgetSize.width / 2.0f - ((NUMBER_OF_BUTTONS - 1) / 2.0f) * BUTTON_WIDTH;
-		for(int i = 0; i < NUMBER_OF_BUTTONS; ++i)
-		{
-			RadioButton* radioButton = RadioButton::create("cocosui/radio_button_off.png", "cocosui/radio_button_on.png");
-			float posX = startPosX + BUTTON_WIDTH * i;
-			radioButton->setPosition(Vec2(posX, widgetSize.height / 2.0f + 10));
-			radioButton->setScale(1.2f);
-			_radioButtonGroup->addRadioButton(radioButton);
-			_uiLayer->addChild(radioButton);
-		}
-		
-		// Add button
-		Button* addButton = Button::create("cocosui/backtotopnormal.png", "cocosui/backtotoppressed.png");
-		addButton->setTitleText("Add");
-		addButton->setPosition(Vec2(widgetSize.width / 2.0f - 100, widgetSize.height / 2.0f - 65));
-		addButton->addClickEventListener(CC_CALLBACK_1(UIRadioButtonTest::addRadioButton, this));
-		addButton->setScale(0.7f);
-		_uiLayer->addChild(addButton);
-		
-		// Delete button
-		Button* deleteButton = Button::create("cocosui/backtotopnormal.png", "cocosui/backtotoppressed.png");
-		deleteButton->setTitleText("Delete");
-		deleteButton->setPosition(Vec2(widgetSize.width / 2.0f, widgetSize.height / 2.0f - 65));
-		deleteButton->addClickEventListener(CC_CALLBACK_1(UIRadioButtonTest::deleteRadioButton, this));
-		deleteButton->setScale(0.7f);
-		_uiLayer->addChild(deleteButton);
-		
-		// Toggle button
-		Button* allowNoSelectionToggle = Button::create("cocosui/backtotopnormal.png", "cocosui/backtotoppressed.png");
-		allowNoSelectionToggle->setTitleText("Toggle Allow-No-Selection");
-		allowNoSelectionToggle->setPosition(Vec2(widgetSize.width / 2.0f + 100, widgetSize.height / 2.0f - 65));
-		allowNoSelectionToggle->addClickEventListener([this](Ref*) {
-			_radioButtonGroup->setAllowedNoSelection(!_radioButtonGroup->isAllowedNoSelection());
-			_allowNoSelectionText->setString(_radioButtonGroup->isAllowedNoSelection() ? "No selection is allowed." : "No selection is disallowed.");
-		});
-		allowNoSelectionToggle->setScale(0.7f);
-		_uiLayer->addChild(allowNoSelectionToggle);
-		
-		// Add a label for toggle
-		_allowNoSelectionText = Text::create("No selection is disallowed.", "fonts/Marker Felt.ttf", 20);
-		_allowNoSelectionText->setPosition(Vec2(widgetSize.width / 2.0f, widgetSize.height / 2.0f + 70));
-		_uiLayer->addChild(_allowNoSelectionText);
+    if (UIScene::init())
+    {
+        Size widgetSize = _widget->getContentSize();
+        
+        // Create a radio button group
+        _radioButtonGroup = RadioButtonGroup::create();
+        _uiLayer->addChild(_radioButtonGroup);
+        
+        // Create the radio buttons
+        static const int NUMBER_OF_BUTTONS = 5;
+        startPosX = widgetSize.width / 2.0f - ((NUMBER_OF_BUTTONS - 1) / 2.0f) * BUTTON_WIDTH;
+        for(int i = 0; i < NUMBER_OF_BUTTONS; ++i)
+        {
+            RadioButton* radioButton = RadioButton::create("cocosui/radio_button_off.png", "cocosui/radio_button_on.png");
+            float posX = startPosX + BUTTON_WIDTH * i;
+            radioButton->setPosition(Vec2(posX, widgetSize.height / 2.0f + 10));
+            radioButton->setScale(1.2f);
+            _radioButtonGroup->addRadioButton(radioButton);
+            _uiLayer->addChild(radioButton);
+        }
+        
+        // Add button
+        Button* addButton = Button::create("cocosui/backtotopnormal.png", "cocosui/backtotoppressed.png");
+        addButton->setTitleText("Add");
+        addButton->setPosition(Vec2(widgetSize.width / 2.0f - 100, widgetSize.height / 2.0f - 65));
+        addButton->addClickEventListener(CC_CALLBACK_1(UIRadioButtonTest::addRadioButton, this));
+        addButton->setScale(0.7f);
+        _uiLayer->addChild(addButton);
+        
+        // Delete button
+        Button* deleteButton = Button::create("cocosui/backtotopnormal.png", "cocosui/backtotoppressed.png");
+        deleteButton->setTitleText("Delete");
+        deleteButton->setPosition(Vec2(widgetSize.width / 2.0f, widgetSize.height / 2.0f - 65));
+        deleteButton->addClickEventListener(CC_CALLBACK_1(UIRadioButtonTest::deleteRadioButton, this));
+        deleteButton->setScale(0.7f);
+        _uiLayer->addChild(deleteButton);
+        
+        // Toggle button
+        Button* allowNoSelectionToggle = Button::create("cocosui/backtotopnormal.png", "cocosui/backtotoppressed.png");
+        allowNoSelectionToggle->setTitleText("Toggle Allow-No-Selection");
+        allowNoSelectionToggle->setPosition(Vec2(widgetSize.width / 2.0f + 100, widgetSize.height / 2.0f - 65));
+        allowNoSelectionToggle->addClickEventListener([this](Ref*) {
+            _radioButtonGroup->setAllowedNoSelection(!_radioButtonGroup->isAllowedNoSelection());
+            _allowNoSelectionText->setString(_radioButtonGroup->isAllowedNoSelection() ? "No selection is allowed." : "No selection is disallowed.");
+        });
+        allowNoSelectionToggle->setScale(0.7f);
+        _uiLayer->addChild(allowNoSelectionToggle);
+        
+        // Add a label for toggle
+        _allowNoSelectionText = Text::create("No selection is disallowed.", "fonts/Marker Felt.ttf", 20);
+        _allowNoSelectionText->setPosition(Vec2(widgetSize.width / 2.0f, widgetSize.height / 2.0f + 70));
+        _uiLayer->addChild(_allowNoSelectionText);
 
-		return true;
-	}
-	return false;
+        return true;
+    }
+    return false;
 }
 
 void UIRadioButtonTest::addRadioButton(Ref* sender)
 {
-	Vec2 pos;
-	if(_radioButtonGroup->getNumberOfRadioButtons() > 0)
-	{
-		RadioButton* lastRadioButton = _radioButtonGroup->getRadioButtonByIndex((int)_radioButtonGroup->getNumberOfRadioButtons() - 1);
-		pos = lastRadioButton->getPosition();
-	}
-	else
-	{
-		pos.x = startPosX - BUTTON_WIDTH;
-		pos.y = _widget->getContentSize().height / 2.0f + 10;
-	}
-	
-	RadioButton* radioButton = RadioButton::create("cocosui/radio_button_off.png", "cocosui/radio_button_on.png");
-	pos.x += + BUTTON_WIDTH;
-	radioButton->setPosition(pos);
-	_radioButtonGroup->addRadioButton(radioButton);
-	_uiLayer->addChild(radioButton);
+    Vec2 pos;
+    if(_radioButtonGroup->getNumberOfRadioButtons() > 0)
+    {
+        RadioButton* lastRadioButton = _radioButtonGroup->getRadioButtonByIndex((int)_radioButtonGroup->getNumberOfRadioButtons() - 1);
+        pos = lastRadioButton->getPosition();
+    }
+    else
+    {
+        pos.x = startPosX - BUTTON_WIDTH;
+        pos.y = _widget->getContentSize().height / 2.0f + 10;
+    }
+    
+    RadioButton* radioButton = RadioButton::create("cocosui/radio_button_off.png", "cocosui/radio_button_on.png");
+    pos.x += + BUTTON_WIDTH;
+    radioButton->setPosition(pos);
+    _radioButtonGroup->addRadioButton(radioButton);
+    _uiLayer->addChild(radioButton);
 }
 
 void UIRadioButtonTest::deleteRadioButton(Ref* sender)
 {
-	if(_radioButtonGroup->getNumberOfRadioButtons() > 0)
-	{
-		RadioButton* radioButton = _radioButtonGroup->getRadioButtonByIndex((int)_radioButtonGroup->getNumberOfRadioButtons() - 1);
-		_radioButtonGroup->removeRadioButton(radioButton);
-		_uiLayer->removeChild(radioButton);
-	}
+    if(_radioButtonGroup->getNumberOfRadioButtons() > 0)
+    {
+        RadioButton* radioButton = _radioButtonGroup->getRadioButtonByIndex((int)_radioButtonGroup->getNumberOfRadioButtons() - 1);
+        _radioButtonGroup->removeRadioButton(radioButton);
+        _uiLayer->removeChild(radioButton);
+    }
 }
 
 
@@ -125,8 +125,8 @@ _buttonEventLabel(nullptr),
 _logConsole(nullptr),
 _numberOfLogLines(0)
 {
-	_radioButtonGroups[0] = nullptr;
-	_radioButtonGroups[1] = nullptr;
+    _radioButtonGroups[0] = nullptr;
+    _radioButtonGroups[1] = nullptr;
 }
 
 UIRadioButtonTwoGroupsTest::~UIRadioButtonTwoGroupsTest()
@@ -140,77 +140,77 @@ bool UIRadioButtonTwoGroupsTest::init()
         Size widgetSize = _widget->getContentSize();;
         
         // Add a label in which the radio button events will be displayed
-		_groupEventLabel = Text::create("RadioButtonGroup : No Event", "fonts/Marker Felt.ttf", 25);
-		_groupEventLabel->setAnchorPoint(Vec2(0.5f, -1));
-		_groupEventLabel->setPosition(Vec2(widgetSize.width / 2.0f, widgetSize.height / 2.0f + 70));
-		_uiLayer->addChild(_groupEventLabel);
-		
+        _groupEventLabel = Text::create("RadioButtonGroup : No Event", "fonts/Marker Felt.ttf", 25);
+        _groupEventLabel->setAnchorPoint(Vec2(0.5f, -1));
+        _groupEventLabel->setPosition(Vec2(widgetSize.width / 2.0f, widgetSize.height / 2.0f + 70));
+        _uiLayer->addChild(_groupEventLabel);
+        
         _buttonEventLabel = Text::create("RadioButton : No Event", "fonts/Marker Felt.ttf", 25);
         _buttonEventLabel->setAnchorPoint(Vec2(0.5f, -1));
         _buttonEventLabel->setPosition(Vec2(widgetSize.width / 2.0f, widgetSize.height / 2.0f + 35));
         _uiLayer->addChild(_buttonEventLabel);
-		
-		_logConsole = Text::create("", "fonts/Marker Felt.ttf", 10);
-		_logConsole->setAnchorPoint(Vec2(0, 1));
-		_logConsole->setPosition(Vec2(widgetSize.width / 2.0f + 110, widgetSize.height / 2.0f + 55));
-		_uiLayer->addChild(_logConsole);
+        
+        _logConsole = Text::create("", "fonts/Marker Felt.ttf", 10);
+        _logConsole->setAnchorPoint(Vec2(0, 1));
+        _logConsole->setPosition(Vec2(widgetSize.width / 2.0f + 110, widgetSize.height / 2.0f + 55));
+        _uiLayer->addChild(_logConsole);
 
-		static const int NUMBER_OF_BUTTONS = 4;
-		static const float SPACE_BETWEEN_BUTTONS = 50;
-		float startPosX = widgetSize.width / 2.0f - ((NUMBER_OF_BUTTONS - 1) / 2.0f) * SPACE_BETWEEN_BUTTONS;
-		
-		for(int type = 0; type < 2; ++type)
-		{
-			// Create a radio button group
-			const char *normalImage, *selectedImage;
-			float posYAdjust = 0;
-			_radioButtonGroups[type] = RadioButtonGroup::create();
-			if(type == 0)
-			{
-				_radioButtonGroups[type]->addEventListener(CC_CALLBACK_3(UIRadioButtonTwoGroupsTest::onChangedRadioButtonGroup1, this));
-				normalImage = "cocosui/radio_button_off.png";
-				selectedImage = "cocosui/radio_button_on.png";
-				posYAdjust = 35;
-			}
-			else
-			{
-				_radioButtonGroups[type]->addEventListener(CC_CALLBACK_3(UIRadioButtonTwoGroupsTest::onChangedRadioButtonGroup2, this));
-				normalImage = "cocosui/UIEditorTest/2.1/Button/button_common_box03_003 copy 221.png";
-				selectedImage = "cocosui/UIEditorTest/2.1/Button/button_common_box03_001.png";
-				posYAdjust = -15;
-			}
-			_uiLayer->addChild(_radioButtonGroups[type]);
-			
-			// Set allowing no selections
-			_radioButtonGroups[type]->setAllowedNoSelection(type == 0);
+        static const int NUMBER_OF_BUTTONS = 4;
+        static const float SPACE_BETWEEN_BUTTONS = 50;
+        float startPosX = widgetSize.width / 2.0f - ((NUMBER_OF_BUTTONS - 1) / 2.0f) * SPACE_BETWEEN_BUTTONS;
+        
+        for(int type = 0; type < 2; ++type)
+        {
+            // Create a radio button group
+            const char *normalImage, *selectedImage;
+            float posYAdjust = 0;
+            _radioButtonGroups[type] = RadioButtonGroup::create();
+            if(type == 0)
+            {
+                _radioButtonGroups[type]->addEventListener(CC_CALLBACK_3(UIRadioButtonTwoGroupsTest::onChangedRadioButtonGroup1, this));
+                normalImage = "cocosui/radio_button_off.png";
+                selectedImage = "cocosui/radio_button_on.png";
+                posYAdjust = 35;
+            }
+            else
+            {
+                _radioButtonGroups[type]->addEventListener(CC_CALLBACK_3(UIRadioButtonTwoGroupsTest::onChangedRadioButtonGroup2, this));
+                normalImage = "cocosui/UIEditorTest/2.1/Button/button_common_box03_003 copy 221.png";
+                selectedImage = "cocosui/UIEditorTest/2.1/Button/button_common_box03_001.png";
+                posYAdjust = -15;
+            }
+            _uiLayer->addChild(_radioButtonGroups[type]);
+            
+            // Set allowing no selections
+            _radioButtonGroups[type]->setAllowedNoSelection(type == 0);
 
-			// Create the radio buttons
-			for(int i = 0; i < NUMBER_OF_BUTTONS; ++i)
-			{
-				RadioButton* radioButton = nullptr;
-				float posY = widgetSize.height / 2.0f + posYAdjust;
-				radioButton = RadioButton::create(normalImage, selectedImage);
-				float posX = startPosX + SPACE_BETWEEN_BUTTONS * i;
-				radioButton->setScale(1.5f);
-				radioButton->setPosition(Vec2(posX, posY));
-				
-				radioButton->addEventListener(CC_CALLBACK_2(UIRadioButtonTwoGroupsTest::onChangedRadioButtonSelect, this));
-				radioButton->setTag(i);
-				_uiLayer->addChild(radioButton);
-				_radioButtonGroups[type]->addRadioButton(radioButton);
-			}
-		}
-		
-		Button* clearButton = Button::create("cocosui/backtotopnormal.png", "cocosui/backtotoppressed.png");
-		clearButton->setTitleText("Clear");
-		clearButton->setPosition(Vec2(widgetSize.width / 2.0f, widgetSize.height / 2.0f - 65));
-		clearButton->addClickEventListener(CC_CALLBACK_1(UIRadioButtonTwoGroupsTest::clearRadioButtonGroup, this));
-		clearButton->setScale(0.8f);
-		_uiLayer->addChild(clearButton);
-		
-		Text* text1 = Text::create("Upper radio button group is allowed non-selection, but lower one is not.", "fonts/Marker Felt.ttf", 15);
-		text1->setPosition(Vec2(widgetSize.width / 2.0f, widgetSize.height / 2.0f - 100));
-		_uiLayer->addChild(text1);
+            // Create the radio buttons
+            for(int i = 0; i < NUMBER_OF_BUTTONS; ++i)
+            {
+                RadioButton* radioButton = nullptr;
+                float posY = widgetSize.height / 2.0f + posYAdjust;
+                radioButton = RadioButton::create(normalImage, selectedImage);
+                float posX = startPosX + SPACE_BETWEEN_BUTTONS * i;
+                radioButton->setScale(1.5f);
+                radioButton->setPosition(Vec2(posX, posY));
+                
+                radioButton->addEventListener(CC_CALLBACK_2(UIRadioButtonTwoGroupsTest::onChangedRadioButtonSelect, this));
+                radioButton->setTag(i);
+                _uiLayer->addChild(radioButton);
+                _radioButtonGroups[type]->addRadioButton(radioButton);
+            }
+        }
+        
+        Button* clearButton = Button::create("cocosui/backtotopnormal.png", "cocosui/backtotoppressed.png");
+        clearButton->setTitleText("Clear");
+        clearButton->setPosition(Vec2(widgetSize.width / 2.0f, widgetSize.height / 2.0f - 65));
+        clearButton->addClickEventListener(CC_CALLBACK_1(UIRadioButtonTwoGroupsTest::clearRadioButtonGroup, this));
+        clearButton->setScale(0.8f);
+        _uiLayer->addChild(clearButton);
+        
+        Text* text1 = Text::create("Upper radio button group is allowed non-selection, but lower one is not.", "fonts/Marker Felt.ttf", 15);
+        text1->setPosition(Vec2(widgetSize.width / 2.0f, widgetSize.height / 2.0f - 100));
+        _uiLayer->addChild(text1);
 
         return true;
     }
@@ -219,116 +219,116 @@ bool UIRadioButtonTwoGroupsTest::init()
 
 void UIRadioButtonTwoGroupsTest::onChangedRadioButtonGroup1(RadioButton* radioButton, int index, cocos2d::ui::RadioButtonGroup::EventType type)
 {
-	CCASSERT(index == _radioButtonGroups[0]->getSelectedButtonIndex(), "The two indexes must match!");
-	__String* text = String::createWithFormat("RadioButtonGroup1 : %d", index);
-	_groupEventLabel->setString(text->getCString());
-	addLog(text->getCString());
+    CCASSERT(index == _radioButtonGroups[0]->getSelectedButtonIndex(), "The two indexes must match!");
+    __String* text = String::createWithFormat("RadioButtonGroup1 : %d", index);
+    _groupEventLabel->setString(text->getCString());
+    addLog(text->getCString());
 }
 
 void UIRadioButtonTwoGroupsTest::onChangedRadioButtonGroup2(RadioButton* radioButton, int index, cocos2d::ui::RadioButtonGroup::EventType type)
 {
-	CCASSERT(index == _radioButtonGroups[1]->getSelectedButtonIndex(), "The two indexes must match!");
-	__String* text = String::createWithFormat("RadioButtonGroup2 : %d", index);
-	_groupEventLabel->setString(text->getCString());
-	addLog(text->getCString());
+    CCASSERT(index == _radioButtonGroups[1]->getSelectedButtonIndex(), "The two indexes must match!");
+    __String* text = String::createWithFormat("RadioButtonGroup2 : %d", index);
+    _groupEventLabel->setString(text->getCString());
+    addLog(text->getCString());
 }
 
 void UIRadioButtonTwoGroupsTest::onChangedRadioButtonSelect(RadioButton* radioButton, RadioButton::EventType type)
 {
-	if(radioButton == nullptr)
-	{
-		return;
-	}
-	__String* text = String::createWithFormat("RadioButton %d : ", radioButton->getTag());
+    if(radioButton == nullptr)
+    {
+        return;
+    }
+    __String* text = String::createWithFormat("RadioButton %d : ", radioButton->getTag());
     switch (type)
     {
         case RadioButton::EventType::SELECTED:
-		{
-			text->append("Selected");
-			break;
-		}
-			
+        {
+            text->append("Selected");
+            break;
+        }
+            
         case RadioButton::EventType::UNSELECTED:
-		{
-			text->append("Unselected");
-			break;
-		}
+        {
+            text->append("Unselected");
+            break;
+        }
         default:
             break;
     }
-	_buttonEventLabel->setString(text->getCString());
-	addLog(text->getCString());
+    _buttonEventLabel->setString(text->getCString());
+    addLog(text->getCString());
 }
 
 void UIRadioButtonTwoGroupsTest::clearRadioButtonGroup(Ref* sender)
 {
-	for(int i = 0; i < 2; ++i)
-	{
-		_radioButtonGroups[i]->setSelectedButton(nullptr);
-	}
+    for(int i = 0; i < 2; ++i)
+    {
+        _radioButtonGroups[i]->setSelectedButton(nullptr);
+    }
 }
 
 void UIRadioButtonTwoGroupsTest::addLog(const std::string& log)
 {
-	std::string existingLog = _logConsole->getString();
-	if(!existingLog.empty())
-	{
-		existingLog = existingLog + "\n";
-	}
-	existingLog = existingLog + log;
-	++_numberOfLogLines;
-	
-	if(_numberOfLogLines > 10)
-	{
-		size_t pos = existingLog.find("\n") + 1;
-		std::string newLog = existingLog.substr(pos);
-		existingLog = newLog;
-		--_numberOfLogLines;
-	}
-	
-	_logConsole->setString(existingLog);
+    std::string existingLog = _logConsole->getString();
+    if(!existingLog.empty())
+    {
+        existingLog = existingLog + "\n";
+    }
+    existingLog = existingLog + log;
+    ++_numberOfLogLines;
+    
+    if(_numberOfLogLines > 10)
+    {
+        size_t pos = existingLog.find("\n") + 1;
+        std::string newLog = existingLog.substr(pos);
+        existingLog = newLog;
+        --_numberOfLogLines;
+    }
+    
+    _logConsole->setString(existingLog);
 }
 
 
 // UIRadioButtonTabTest
 bool UIRadioButtonTabTest::init()
 {
-	if (UIScene::init())
-	{
-		Size widgetSize = _widget->getContentSize();;
-		
-		static const float BUTTON_SCALE = 0.5f;
-		const float buttonWidth = 350 * BUTTON_SCALE / Director::getInstance()->getContentScaleFactor();
-		
-		// Background for buttons
-		LayerColor* colorLayer = LayerColor::create(Color4B::WHITE);
-		colorLayer->ignoreAnchorPointForPosition(false);
-		colorLayer->setAnchorPoint(Vec2::ANCHOR_MIDDLE);
-		colorLayer->setContentSize(Size(buttonWidth * 3, 170 / Director::getInstance()->getContentScaleFactor()));
-		colorLayer->setPosition(widgetSize / 2.0f);
-		_uiLayer->addChild(colorLayer);
-		
-		// Create a radio button group
-		RadioButtonGroup* radioButtonGroup = RadioButtonGroup::create();
-		_uiLayer->addChild(radioButtonGroup);
-		
-		// Create the radio buttons
-		static const int NUMBER_OF_BUTTONS = 3;
-		float startPosX = widgetSize.width / 2.0f - ((NUMBER_OF_BUTTONS - 1) / 2.0f) * buttonWidth;
-		for(int i = 0; i < NUMBER_OF_BUTTONS; ++i)
-		{
-			__String* filePathNormal = String::createWithFormat("cocosui/btn_exercise%02d_n.png", i + 1);
-			__String* filePathSelected = String::createWithFormat("cocosui/btn_exercise%02d_p.png", i + 1);
-			RadioButton* radioButton = RadioButton::create(filePathNormal->getCString(), filePathSelected->getCString());
-			float posX = startPosX + buttonWidth * i;
-			radioButton->setPosition(Vec2(posX, widgetSize.height / 2.0f));
-			radioButton->setScale(BUTTON_SCALE);
-			radioButton->setZoomScale(0.05f);
-			radioButtonGroup->addRadioButton(radioButton);
-			_uiLayer->addChild(radioButton);
-		}
-		radioButtonGroup->setSelectedButton(0);
-		return true;
-	}
-	return false;
+    if (UIScene::init())
+    {
+        Size widgetSize = _widget->getContentSize();;
+        
+        static const float BUTTON_SCALE = 0.5f;
+        const float buttonWidth = 350 * BUTTON_SCALE / Director::getInstance()->getContentScaleFactor();
+        
+        // Background for buttons
+        LayerColor* colorLayer = LayerColor::create(Color4B::WHITE);
+        colorLayer->ignoreAnchorPointForPosition(false);
+        colorLayer->setAnchorPoint(Vec2::ANCHOR_MIDDLE);
+        colorLayer->setContentSize(Size(buttonWidth * 3, 170 / Director::getInstance()->getContentScaleFactor()));
+        colorLayer->setPosition(widgetSize / 2.0f);
+        _uiLayer->addChild(colorLayer);
+        
+        // Create a radio button group
+        RadioButtonGroup* radioButtonGroup = RadioButtonGroup::create();
+        _uiLayer->addChild(radioButtonGroup);
+        
+        // Create the radio buttons
+        static const int NUMBER_OF_BUTTONS = 3;
+        float startPosX = widgetSize.width / 2.0f - ((NUMBER_OF_BUTTONS - 1) / 2.0f) * buttonWidth;
+        for(int i = 0; i < NUMBER_OF_BUTTONS; ++i)
+        {
+            __String* filePathNormal = String::createWithFormat("cocosui/btn_exercise%02d_n.png", i + 1);
+            __String* filePathSelected = String::createWithFormat("cocosui/btn_exercise%02d_p.png", i + 1);
+            RadioButton* radioButton = RadioButton::create(filePathNormal->getCString(), filePathSelected->getCString());
+            float posX = startPosX + buttonWidth * i;
+            radioButton->setPosition(Vec2(posX, widgetSize.height / 2.0f));
+            radioButton->setScale(BUTTON_SCALE);
+            radioButton->setZoomScale(0.05f);
+            radioButtonGroup->addRadioButton(radioButton);
+            _uiLayer->addChild(radioButton);
+        }
+        radioButtonGroup->setSelectedButton(0);
+        return true;
+    }
+    return false;
 }
diff --git a/tests/cpp-tests/Classes/UITest/CocoStudioGUITest/UIRadioButtonTest/UIRadioButtonTest.h b/tests/cpp-tests/Classes/UITest/CocoStudioGUITest/UIRadioButtonTest/UIRadioButtonTest.h
index b708e2516d..42bf9d6ad2 100644
--- a/tests/cpp-tests/Classes/UITest/CocoStudioGUITest/UIRadioButtonTest/UIRadioButtonTest.h
+++ b/tests/cpp-tests/Classes/UITest/CocoStudioGUITest/UIRadioButtonTest/UIRadioButtonTest.h
@@ -32,20 +32,20 @@ DEFINE_TEST_SUITE(UIRadioButtonTests);
 class UIRadioButtonTest : public UIScene
 {
 public:
-	CREATE_FUNC(UIRadioButtonTest);
-	
-	UIRadioButtonTest();
-	~UIRadioButtonTest();
-	
-	virtual bool init() override;
-	
-	void addRadioButton(Ref* sender);
-	void deleteRadioButton(Ref* sender);
+    CREATE_FUNC(UIRadioButtonTest);
+    
+    UIRadioButtonTest();
+    ~UIRadioButtonTest();
+    
+    virtual bool init() override;
+    
+    void addRadioButton(Ref* sender);
+    void deleteRadioButton(Ref* sender);
 
 private:
-	cocos2d::ui::RadioButtonGroup* _radioButtonGroup;
-	cocos2d::ui::Text* _allowNoSelectionText;
-	
+    cocos2d::ui::RadioButtonGroup* _radioButtonGroup;
+    cocos2d::ui::Text* _allowNoSelectionText;
+    
 };
 
 
@@ -58,27 +58,27 @@ public:
     ~UIRadioButtonTwoGroupsTest();
 
     virtual bool init() override;
-	void onChangedRadioButtonGroup1(cocos2d::ui::RadioButton* radioButton, int index, cocos2d::ui::RadioButtonGroup::EventType type);
-	void onChangedRadioButtonGroup2(cocos2d::ui::RadioButton* radioButton, int index, cocos2d::ui::RadioButtonGroup::EventType type);
-	void onChangedRadioButtonSelect(cocos2d::ui::RadioButton* radioButton,cocos2d::ui::RadioButton::EventType type);
-	void clearRadioButtonGroup(Ref* sender);
+    void onChangedRadioButtonGroup1(cocos2d::ui::RadioButton* radioButton, int index, cocos2d::ui::RadioButtonGroup::EventType type);
+    void onChangedRadioButtonGroup2(cocos2d::ui::RadioButton* radioButton, int index, cocos2d::ui::RadioButtonGroup::EventType type);
+    void onChangedRadioButtonSelect(cocos2d::ui::RadioButton* radioButton,cocos2d::ui::RadioButton::EventType type);
+    void clearRadioButtonGroup(Ref* sender);
 
     
 protected:
-	void addLog(const std::string& log);
-	
-	cocos2d::ui::RadioButtonGroup* _radioButtonGroups[2];
-	cocos2d::ui::Text* _groupEventLabel;
-	cocos2d::ui::Text* _buttonEventLabel;
-	cocos2d::ui::Text* _logConsole;
-	int _numberOfLogLines;
+    void addLog(const std::string& log);
+    
+    cocos2d::ui::RadioButtonGroup* _radioButtonGroups[2];
+    cocos2d::ui::Text* _groupEventLabel;
+    cocos2d::ui::Text* _buttonEventLabel;
+    cocos2d::ui::Text* _logConsole;
+    int _numberOfLogLines;
 };
 
 class UIRadioButtonTabTest : public UIScene
 {
 public:
-	CREATE_FUNC(UIRadioButtonTabTest);
-	virtual bool init() override;
+    CREATE_FUNC(UIRadioButtonTabTest);
+    virtual bool init() override;
 };
 
 #endif /* defined(__TestCpp__UIRadioButtonTest__) */