From 240bf58bfcc328cadb5abe854c42775e00de3f62 Mon Sep 17 00:00:00 2001
From: andyque <guanghui8827@126.com>
Date: Tue, 14 Apr 2015 15:34:15 +0800
Subject: [PATCH] fix edge case crash

---
 cocos/ui/UIButton.cpp | 33 ++++++++++++++++++++++++++-------
 cocos/ui/UIButton.h   |  2 +-
 2 files changed, 27 insertions(+), 8 deletions(-)

diff --git a/cocos/ui/UIButton.cpp b/cocos/ui/UIButton.cpp
index 16b482d96c..c9eea6d84e 100644
--- a/cocos/ui/UIButton.cpp
+++ b/cocos/ui/UIButton.cpp
@@ -845,15 +845,22 @@ Label* Button::getTitleRenderer()const
     return _titleRenderer;
 }
 
-const std::string& Button::getTitleFontName() const
+const std::string Button::getTitleFontName() const
 {
-    if(this->_type == FontType::SYSTEM)
+    if (nullptr != _titleRenderer)
     {
-        return _titleRenderer->getSystemFontName();
+        if(this->_type == FontType::SYSTEM)
+        {
+            return _titleRenderer->getSystemFontName();
+        }
+        else
+        {
+            return  _titleRenderer->getTTFConfig().fontFilePath;
+        }
     }
     else
     {
-        return  _titleRenderer->getTTFConfig().fontFilePath;
+        return "";
     }
 }
 
@@ -874,9 +881,21 @@ void Button::copySpecialProperties(Widget *widget)
     {
         _prevIgnoreSize = button->_prevIgnoreSize;
         setScale9Enabled(button->_scale9Enabled);
-        loadTextureNormal(button->_buttonNormalRenderer->getSprite()->getSpriteFrame());
-        loadTexturePressed(button->_buttonClickedRenderer->getSprite()->getSpriteFrame());
-        loadTextureDisabled(button->_buttonDisableRenderer->getSprite()->getSpriteFrame());
+        auto normalSprite = button->_buttonNormalRenderer->getSprite();
+        if (nullptr != normalSprite)
+        {
+            loadTextureNormal(normalSprite->getSpriteFrame());
+        }
+        auto clickedSprite = button->_buttonClickedRenderer->getSprite();
+        if (nullptr != clickedSprite)
+        {
+            loadTexturePressed(clickedSprite->getSpriteFrame());
+        }
+        auto disabledSprite = button->_buttonDisableRenderer->getSprite();
+        if (nullptr != disabledSprite)
+        {
+            loadTextureDisabled(disabledSprite->getSpriteFrame());
+        }
         setCapInsetsNormalRenderer(button->_capInsetsNormal);
         setCapInsetsPressedRenderer(button->_capInsetsPressed);
         setCapInsetsDisabledRenderer(button->_capInsetsDisabled);
diff --git a/cocos/ui/UIButton.h b/cocos/ui/UIButton.h
index 3ab95f360a..161e99651d 100644
--- a/cocos/ui/UIButton.h
+++ b/cocos/ui/UIButton.h
@@ -245,7 +245,7 @@ public:
      * Query the font name of button's title
      *@return font name in std::string
      */
-    const std::string& getTitleFontName() const;
+    const std::string getTitleFontName() const;
 
     /** @brief When user pressed the button, the button will zoom to a scale.
      * The final scale of the button  equals (button original scale + _zoomScale)