模拟屏幕震动效果，使用cocos2d-x 3.x

void shakeNode(cocos2d::Node *node,float duration,float rate)
{
    Vec2 pos = node->getPosition();
    float tmp =0;
    float zs = node->getScale();
    schedule([=](float dt) mutable
    {
        tmp += dt;
        if (tmp>=duration)
        {
            unschedule("updateShake");
            node->setPosition(pos);
            node->setScale(zs);
            return ;
        }
        else
        {
            float z = (arc4random()%5+98) * 0.01f;
            CCLOG("z=%f",z);
            float x = arc4random() % 3 + 1;
            float y = arc4random() % 4 + 1;
            int r = arc4random() % 2;
            if (r>0) {
                x *= -1;
                r = arc4random() % 2;
                if (r>0) {
                    y *= -1;
                }
            }
            node->setPosition(x,y);
            node->setScale(z);
        }
    },rate,"updateShake");
}