diff --git a/cocos/2d/platform/ios/CCDevice.mm b/cocos/2d/platform/ios/CCDevice.mm
index 1529750760..e33dac7914 100644
--- a/cocos/2d/platform/ios/CCDevice.mm
+++ b/cocos/2d/platform/ios/CCDevice.mm
@@ -199,6 +199,18 @@ typedef struct
     
 } tImageInfo;
 
+static bool s_isIOS7OrHigher = false;
+
+static inline void lazyCheckIOS7()
+{
+    static bool isInited = false;
+    if (!isInited)
+    {
+        s_isIOS7OrHigher = [[[UIDevice currentDevice] systemVersion] compare:@"7.0" options:NSNumericSearch] != NSOrderedAscending;
+        isInited = true;
+    }
+}
+
 static CGSize _calculateStringSize(NSString *str, id font, CGSize *constrainSize)
 {
     NSArray *listItems = [str componentsSeparatedByString: @"\n"];
@@ -209,7 +221,6 @@ static CGSize _calculateStringSize(NSString *str, id font, CGSize *constrainSize
     textRect.height = constrainSize->height > 0 ? constrainSize->height
     : 0x7fffffff;
     
-    
     for (NSString *s in listItems)
     {
         CGSize tmp = [s sizeWithFont:font constrainedToSize:textRect];
@@ -222,6 +233,9 @@ static CGSize _calculateStringSize(NSString *str, id font, CGSize *constrainSize
         dim.height += tmp.height;
     }
     
+    dim.width = ceilf(dim.width);
+    dim.height = ceilf(dim.height);
+    
     return dim;
 }
 
@@ -230,8 +244,12 @@ static CGSize _calculateStringSize(NSString *str, id font, CGSize *constrainSize
 #define ALIGN_CENTER 3
 #define ALIGN_BOTTOM 2
 
+
 static bool _initWithString(const char * text, cocos2d::Device::TextAlign align, const char * fontName, int size, tImageInfo* info)
 {
+    // lazy check whether it is iOS7 device
+    lazyCheckIOS7();
+    
     bool bRet = false;
     do
     {
@@ -376,7 +394,7 @@ static bool _initWithString(const char * text, cocos2d::Device::TextAlign align,
         {
             CGContextSetTextDrawingMode(context, kCGTextStroke);
             
-            if([[[UIDevice currentDevice] systemVersion] compare:@"7.0" options:NSNumericSearch] != NSOrderedAscending)
+            if(s_isIOS7OrHigher)
             {
                 NSMutableParagraphStyle *paragraphStyle = [[NSMutableParagraphStyle alloc] init];
                 paragraphStyle.alignment = nsAlign;
@@ -412,7 +430,7 @@ static bool _initWithString(const char * text, cocos2d::Device::TextAlign align,
         
         // actually draw the text in the context
         [str drawInRect: rect withFont:font lineBreakMode:NSLineBreakByWordWrapping alignment:nsAlign];
-
+        
         CGContextEndTransparencyLayer(context);
         
         // pop the context
diff --git a/tests/cpp-tests/Classes/LabelTest/LabelTest.cpp b/tests/cpp-tests/Classes/LabelTest/LabelTest.cpp
index 2b1d00ced5..1bcff90efe 100644
--- a/tests/cpp-tests/Classes/LabelTest/LabelTest.cpp
+++ b/tests/cpp-tests/Classes/LabelTest/LabelTest.cpp
@@ -804,7 +804,7 @@ LabelsEmpty::LabelsEmpty()
     label1->setPosition(Point(s.width/2, s.height-100));
 
     // LabelTTF
-    auto label2 = LabelTTF::create("", "fonts/arial.ttf", 24);
+    auto label2 = LabelTTF::create("", "Arial", 24);
     addChild(label2, 0, kTagBitmapAtlas2);
     label2->setPosition(Point(s.width/2, s.height/2));
 
@@ -1000,7 +1000,7 @@ void  LabelTTFTest::updateAlignment()
 
     CC_SAFE_RELEASE(_label);
 
-    _label = LabelTTF::create(this->getCurrentAlignment(), "fonts/Marker Felt.ttf", 32,
+    _label = LabelTTF::create(this->getCurrentAlignment(), "Marker Felt", 32,
                                   blockSize, _horizAlign, _vertAlign);
     _label->retain();
 
@@ -1115,7 +1115,7 @@ std::string LabelTTFMultiline::subtitle() const
 LabelTTFChinese::LabelTTFChinese()
 {
     auto size = Director::getInstance()->getWinSize();
-    auto label = LabelTTF::create("中国", "fonts/Marker Felt.ttf", 30);
+    auto label = LabelTTF::create("中国", "Marker Felt", 30);
     label->setPosition(Point(size.width / 2, size.height /2));
     this->addChild(label);
 }
@@ -1350,7 +1350,7 @@ LabelTTFA8Test::LabelTTFA8Test()
     addChild(layer, -10);
 
     // LabelBMFont
-    auto label1 = LabelTTF::create("Testing A8 Format", "fonts/Marker Felt.ttf", 48);
+    auto label1 = LabelTTF::create("Testing A8 Format", "Marker Felt", 48);
     addChild(label1);
     label1->setColor(Color3B::RED);
     label1->setPosition(Point(s.width/2, s.height/2));
@@ -1466,7 +1466,7 @@ TTFFontInit::TTFFontInit()
 
     auto font = LabelTTF::create();
 
-    font->setFontName("fonts/Marker Felt.ttf");
+    font->setFontName("Marker Felt");
     font->setFontSize(48);
     font->setString("It is working!");
     this->addChild(font);
@@ -1500,7 +1500,7 @@ TTFFontShadowAndStroke::TTFFontShadowAndStroke()
     
     FontDefinition shadowTextDef;
     shadowTextDef._fontSize = 20;
-    shadowTextDef._fontName = std::string("fonts/Marker Felt.ttf");
+    shadowTextDef._fontName = std::string("Marker Felt");
     
     shadowTextDef._shadow._shadowEnabled = true;
     shadowTextDef._shadow._shadowOffset  = shadowOffset;
@@ -1519,7 +1519,7 @@ TTFFontShadowAndStroke::TTFFontShadowAndStroke()
     // create the stroke only label
     FontDefinition strokeTextDef;
     strokeTextDef._fontSize = 20;
-    strokeTextDef._fontName = std::string("fonts/Marker Felt.ttf");
+    strokeTextDef._fontName = std::string("Marker Felt");
     
     strokeTextDef._stroke._strokeEnabled = true;
     strokeTextDef._stroke._strokeColor   = strokeColor;
@@ -1539,7 +1539,7 @@ TTFFontShadowAndStroke::TTFFontShadowAndStroke()
     // create the label stroke and shadow
     FontDefinition strokeShaodwTextDef;
     strokeShaodwTextDef._fontSize = 20;
-    strokeShaodwTextDef._fontName = std::string("fonts/Marker Felt.ttf");
+    strokeShaodwTextDef._fontName = std::string("Marker Felt");
     
     strokeShaodwTextDef._stroke._strokeEnabled = true;
     strokeShaodwTextDef._stroke._strokeColor   = strokeShadowColor;