想实现一个按钮，在未选中前进行重复的动画效果，试了下直接发代码吧：

bool MenuItemSpritTest::init()

{

//////////////////////////////

// 1. super init first

if ( !Layer::init() )

{

return false;

}

//创建按钮精灵

Sprite* btn_normal_sprite=Sprite::create("menu_learn.png");

Sprite* btn_select_sprite=Sprite::create("menu_learn_select.png");

//通过sequence重复执行两个渐变动作

FadeTo* fadeto88=FadeTo::create(0.5,88);

FadeTo* fadeto255=FadeTo::create(1,255);

ActionInterval* fadeaction=Sequence::create(fadeto88,fadeto255,NULL);

btn_normal_sprite->runAction(RepeatForever::create(fadeaction));

MenuItemSprite* item1=MenuItemSprite::create(btn_normal_sprite,btn_select_sprite,nullptr,CC_CALLBACK_1(MenuItemSpritTest::select_learn,this));

Menu* menu1=Menu::create(item1,NULL);

menu1->setPosition(200,300);

this->addChild(menu1);

return true;

}

//回调函数

void MenuItemSpritTest::select_learn(Object* pSender){

log("You had selected learn button!");

}