关于CCRANDOM_0_1

CCRANDOM_0_1的范围是[0,1)包括0但不包括1

CCRANDOM_0_1() * 1400.0f / 100.0f是0-13

另外每次随机都是相同的数，要随机下种子

    srand((unsigned int)time(NULL));
    for (int i = 0; i < 100; i++)
    {
        //CCRANDOM_0_1是[0,1)
        //log("%d", (int)(CCRANDOM_0_1()*2));
        //
        
        int idx = (int)(CCRANDOM_0_1() * 1400.0f / 100.0f);
        log("%d",idx);
    }

 递归一个动画，实现动画不停的播放，动画间隔时间为随机数：

callFunc callFuncN表示里面添加一个节点作为参数,传递到调用方法，均为sequence的回调函数，意思为做完这个动作，再执行这个函数。

void MainScene::aciton_dishu(Node* dishu)
{
	//dishu = Sprite::createWithSpriteFrameName("mouse1.png");
	Vector<SpriteFrame*> vec(6);
	char str2[100] = { 0 };
	for (int i = 0; i < 6; i++)
	{
		sprintf(str2, "mouse%d.png", (i + 1));
		auto frame = SpriteFrameCache::getInstance()->getSpriteFrameByName(str2);
		vec.pushBack(frame);
	}
	
	float deayT = CCRANDOM_0_1() * 10;
	log("tag,dely-->%d,%f", dishu->getTag(),deayT);
	auto animation = Animation::createWithSpriteFrames(vec, 0.2f);
	//callFunc callFunN callFunNC分别为0,1,2个参数
	auto action = Animate::create(animation);
	Sequence *seq = Sequence::create(
		DelayTime::create(deayT),
		action,
		action->reverse(),
		//DelayTime::create(deayT),
		CallFunc::create(std::bind(&MainScene::aciton_dishu, this, dishu)),
		nullptr);
	dishu->runAction(seq);
}

　　3.2中callFunc可以通过std::bind绑定任意个数参数到函数里。this是指函数对象指针，后面的是函数参数列表，个人觉得还是CallFunc好用点，CallFuncN不好理解

void ActionRepeatForever::onEnter()
{
    ActionsDemo::onEnter();

    centerSprites(1);

    auto action = Sequence::create(
        DelayTime::create(1),
        CallFunc::create( std::bind( &ActionRepeatForever::repeatForever, this, _grossini) ),
        nullptr);

    _grossini->runAction(action);
}

void ActionRepeatForever::repeatForever(Node* sender)
{
    auto repeat = RepeatForever::create( RotateBy::create(1.0f, 360) );

    sender->runAction(repeat);
}