Animation

Animation 单独渲染每一个精灵帧, 渲染效率低, 浪费资源.
 1     auto sprite = Sprite::create("run1.png");
    sprite->setScale(2);
    sprite->setPosition(visibleSize.width/2, visibleSize.height/2);
    addChild(sprite);
    
    //创建序列帧动画
    auto *animation = Animation::create();
    char s[20] = {0};
    for (int i = 1; i < 9; i++) {
        sprintf(s, "run%d.png", i);
        //添加到序列帧动画
        animation->addSpriteFrameWithFile(s);
    }
    //设置循环多少次
    animation->setLoops(-1);
    //每张图展示的时间
    animation->setDelayPerUnit(0.1f);
    //设置动画结束后恢复到第一帧
    animation->setRestoreOriginalFrame(true);
    //创建序列帧动画动作
    auto action = Animate::create(animation);
    sprite->runAction(action);

 AnimationCache 帧动画缓存, 使用plist文件

    auto m_frameCache = SpriteFrameCache::getInstance();
    m_frameCache->addSpriteFramesWithFile("run.plist", "run.png");
    Vector<SpriteFrame *> vec;
    for (int i = 1; i < 9; i++) {
        auto frame = m_frameCache->getSpriteFrameByName(String::createWithFormat("run%d.png", i)->getCString());
        vec.pushBack(frame);
    }
    Animation *animation = Animation::createWithSpriteFrames(vec);
    animation->setLoops(-1);
    animation->setDelayPerUnit(0.1);
    
    auto action = Animate::create(animation);
    sprite->runAction(action);

//内存不足时, 释放
void releaseCaches(){
    AnimationCache::destroyInstance();
    SpriteFrameCache::getInstance()->removeUnusedSpriteFrames();
    Director::getInstance()->getTextureCache()->removeUnusedTextures();
}