给敌人精灵创建帧动画

//给精灵创建帧动画
Animation* EnemyBase::createAnimation(std::string prefixName, int framesNum, float delay)
{
// 1
    Vector<SpriteFrame*> animFrames;
    // 2
for (int i = 1; i <= framesNum; i++)
    {
        char buffer[20] = { 0 };
        sprintf(buffer, "_%i.png",  i);
        std::string str =  prefixName + buffer;
        auto frame = SpriteFrameCache::getInstance()->getSpriteFrameByName(str);
        animFrames.pushBack(frame);
    }
    // 3
    return Animation::createWithSpriteFrames(animFrames, delay);
}

每一个敌人精灵都带有一个帧动画