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
     
       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);}