void MotionStreakTest::backCallback(CCObject* pSender)
{
    CCScene* s = new MotionStreakTestScene;//CCScene::create();
    s->addChild( backMotionAction() );
    CCDirector::sharedDirector()->replaceScene(s);
    s->release();
} 
void MotionStreakTest::backCallback(Object* sender)
{
    auto s = new MotionStreakTestScene;//CCScene::create();
    s->addChild( backMotionAction() );
    Director::getInstance()->replaceScene(s);
    s->release();
}