转自 ---http://blog.sina.com.cn/s/blog_6d193c030101h40e.html
一、按钮回调
1. Lambda 表达式,C++11 Lambda 赋予了Cocos2d-x 3.0创建回调函数的灵活性。
[cpp]
- auto
itemNor = Sprite::create("CloseNormal.png"); - auto
menuItem = MenuItemSprite::create(itemNor,nullptr,nullptr,[](Ref* sender) - {
-
log("show this msg."); - });
- auto
menu = Menu::create(menuItem,nullptr); - this->addChild(menu);
2.宏定义bind方式创建回调.
[cpp]
- auto
itemNor = Sprite::create("CloseNormal.png"); - auto
menuItem = MenuItemSprite::create(itemNor,nullptr,nullptr,CC_CALLBACK_1(HelloWorld::menuCloseCallback,this)); - auto
menu = Menu::create(menuItem,nullptr); - this->addChild(menu);
-
- void
HelloWorld::menuCloseCallback(Ref* pSender) - {
-
log("show this msg."); - }
[cpp]
- auto
toggleSpNor = Label::createWithSystemFont("OPEN_BAME","WRYH",65); - auto
toggleSpSel = Label::createWithSystemFont("CLOSE_BAME","WRYH",65); - auto
toggleSpDis = Label::createWithSystemFont("DISABLE_BAME","WRYH",65); - auto
toggleItemNor = MenuItemLabel::create(toggleSpNor); - auto
toggleItemSel = MenuItemLabel::create(toggleSpSel); - auto
toggleItemDis = MenuItemLabel::create(toggleSpDis); -
- auto
toggleItem = MenuItemToggle::createWithCallback(CC_CALLBACK_0(HelloWorld::toggleCallBack,this),toggleItemNor,toggleItemSel,nullptr); -
- auto
toggleMenu = Menu::create(toggleItem,nullptr); - this->addChild(toggleMenu);
-
- void
HelloWorld::toggleCallBack() - {
-
log("Do something when toggle did touched.."); - }
二、定时器回调
-
- this->schedule(SEL_SCHEDULE(&HelloWorld::gameStep));
-
- this->scheduleOnce(SEL_SCHEDULE(&HelloWorld::gameStep),3.0f);\
-
- this->scheduleUpdate();
-
- void
HelloWorld::gameStep(float dt) - {
-
log("on timer..."); - }
三、触屏事件回调
- auto
touchEvt = cocos2d::EventListenerTouchOneByO ne::create(); - touchEvt->onTouchBegan
= CC_CALLBACK_2(HelloWorld::onTouchBegan,this); - touchEvt->onTouchMoved
= CC_CALLBACK_2(HelloWorld::onTouchMoved,this); - touchEvt->onTouchEnded
= CC_CALLBACK_2(HelloWorld::onTouchEnded,this); - touchEvt->onTouchCancelled
= CC_CALLBACK_2(HelloWorld::onTouchCancelled,this); -
- Director::getInstance()->getEventDispatcher()->addEventListenerWithScen
eGraphPriority(touchEvt,this); -
- bool
HelloWorld::onTouchBegan(cocos2d::Touch* touch,cocos2d::Event* evt) - {
-
log("Touch began.."); -
return true; - }
- void
HelloWorld::onTouchMoved(cocos2d::Touch* touch,cocos2d::Event* evt) - {
-
log("Touch moved.."); - }
- void
HelloWorld::onTouchEnded(cocos2d::Touch* touch,cocos2d::Event* evt) - {
-
log("Touch leave.."); -
Director::getInstance()->getEventDispatcher()->removeEventListenersForT arget(this); - }
- void
HelloWorld::onTouchCancelled(cocos2d::Touch* touch,cocos2d::Event* evt) - {
-
log("Something was happend , touch event is cut.."); - }
- auto
callBack = CallFunc::create(CC_CALLBACK_0(HelloWorld::actionCallBack,this)); - this->runAction(callBack);
-
- void
HelloWorld::actionCallBack() - {
-
log("Do something when action did finished.."); - }
- auto
callBack = [](EventCustom* evt) -
{ -
log("catch an custom event!!"); -
}; - cocos2d::EventListenerCustom*
customEvt = EventListenerCustom::create("ME_CUSTOM_EVENT_TEST",callBack); - //注册自定义事件(处理优先级为12)
- Director::getInstance()->getEventDispatcher()->addEventListenerWithFixe
dPriority(customEvt,12); -
- //抛出自定义事件
- Director::getInstance()->getEventDispatcher()->dispatchCustomEvent("ME_CUSTOM_EVENT_TEST");