[cocos2dx笔记001] 使用CCSpriteFrameCache

[cocos2dx笔记001] 使用CCSpriteFrameCache

（基于cocos2dx 2.2.2）
如果很多图片很小或常用，可以使用CCSpriteFrameCache,来避免资源被反复加载。 
（注：对于plist，我这里使用的是一个免费的工具，SpritePacker，http://spritepacker.kernys.net）

如：CCSpriteFrameCache::sharedSpriteFrameCache()->addSpriteFramesWithFile("basetank.plist");

<? xml version="1.0" encoding="UTF-8" ?>
<! DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd" >
< plist  version ="1.0" >
< dict >
     < key >frames </ key >
     < dict >
         < key >basetank_down.png </ key >
         < dict >
             < key >frame </ key >
             < string >{{0,0},{26,26}} </ string >
             < key >offset </ key >
             < string >{0,0} </ string >
             < key >rotated </ key >
             < false />
             < key >sourceColorRect </ key >
             < string >{{3,3},{26,26}} </ string >
             < key >sourceSize </ key >
             < string >{32,32} </ string >
         </ dict >
         < key >basetank_left.png </ key >
         < dict >
             < key >frame </ key >
             < string >{{0,27},{26,26}} </ string >
             < key >offset </ key >
             < string >{0,0} </ string >
             < key >rotated </ key >
             < false />
             < key >sourceColorRect </ key >
             < string >{{3,3},{26,26}} </ string >
             < key >sourceSize </ key >
             < string >{32,32} </ string >
         </ dict >
         < key >basetank_right.png </ key >
         < dict >
             < key >frame </ key >
             < string >{{0,54},{26,26}} </ string >
             < key >offset </ key >
             < string >{0,0} </ string >
             < key >rotated </ key >
             < false />
             < key >sourceColorRect </ key >
             < string >{{3,3},{26,26}} </ string >
             < key >sourceSize </ key >
             < string >{32,32} </ string >
         </ dict >
         < key >basetank_up.png </ key >
         < dict >
             < key >frame </ key >
             < string >{{0,81},{26,26}} </ string >
             < key >offset </ key >
             < string >{0,0} </ string >
             < key >rotated </ key >
             < false />
             < key >sourceColorRect </ key >
             < string >{{3,3},{26,26}} </ string >
             < key >sourceSize </ key >
             < string >{32,32} </ string >
         </ dict >
     </ dict >
     < key >metadata </ key >
     < dict >
         < key >format </ key >
         < integer >2 </ integer >
         < key >realTextureFileName </ key >
         < string >basetank.png </ string >
         < key >size </ key >
         < string >{32,128} </ string >
         < key >smartupdate </ key >
         < string >{None} </ string >
         < key >textureFileName </ key >
         < string >basetank.png </ string >
     </ dict >
</ dict >
</ plist >

这样，就可以完成一组图片资源加载。

            CCSprite * p1Pic = CCSprite::createWithSpriteFrameName(“basetank_up.png”);
            p1Pic->setPosition(GetPosition(pPlayerLayer, "Player1"));
            p1Pic->setAnchorPoint(ccp(0, 0));
             this->addChild(p1Pic);

如需更换图片，

p1Pic

->setDisplayFrame(CCSpriteFrameCache::sharedSpriteFrameCache()->spriteFrameByName("basetank_right.png"));
这里的作用相当于是把tank向右转