Cocos2d-x 3.0 回调函数

发布时间：2020-12-14 20:07:59 所属栏目：百科来源：网络整理

导读：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] view plain copy autoitemNor=Sprite::create( "CloseNormal.png" ); automenuItem=MenuItemSprite::create(itemNor,nullptr,[](Ref*sender) { log( "showthi

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] 
    view plain 
    copy 
     
     
     
    
 autoitemNor=Sprite::create("CloseNormal.png");
 automenuItem=MenuItemSprite::create(itemNor,nullptr,[](Ref*sender)
 {
 log("showthismsg.");
 });
 automenu=Menu::create(menuItem,nullptr);
 this->addChild(menu); 

2.宏定义bind方式创建回调.

));

automenu=Menu::create(menuItem,nullptr);
this->addChild(menu);
voidHelloWorld::menuCloseCallback(Ref*pSender)
}

3.MenuToggleItem回事件回调

autotoggleSpNor=Label::createWithSystemFont("OPEN_BAME","WRYH",65);

autotoggleSpSel=Label::createWithSystemFont("CLOSE_BAME",65);
autotoggleSpDis=Label::createWithSystemFont("DISABLE_BAME",248)"> autotoggleItemNor=MenuItemLabel::create(toggleSpNor);
autotoggleItemSel=MenuItemLabel::create(toggleSpSel);
autotoggleItemDis=MenuItemLabel::create(toggleSpDis);
autotoggleItem=MenuItemToggle::createWithCallback(CC_CALLBACK_0(HelloWorld::toggleCallBack,153); font-weight:bold; background-color:inherit">this),toggleItemNor,toggleItemSel,nullptr);
autotoggleMenu=Menu::create(toggleItem,153); font-weight:bold; background-color:inherit">this->addChild(toggleMenu);
voidHelloWorld::toggleCallBack()
{
log("Dosomethingwhentoggledidtouched..");
}

二、定时器回调

[cpp] 
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 /*周期定时调用*/
this->schedule(SEL_SCHEDULE(&HelloWorld::gameStep));
/*倒计是定时调用一次*/
this->scheduleOnce(SEL_SCHEDULE(&HelloWorld::gameStep),3.0f);
/*周期定时调用update需重写update方法*/
this->scheduleUpdate();
 
voidHelloWorld::gameStep(floatdt)
 {
 log("ontimer...");
 }

三、触屏事件回调

autotouchEvt=cocos2d::EventListenerTouchOneByOne::create();

touchEvt->onTouchBegan=CC_CALLBACK_2(HelloWorld::onTouchBegan,153); font-weight:bold; background-color:inherit">this);
touchEvt->onTouchMoved=CC_CALLBACK_2(HelloWorld::onTouchMoved,153); font-weight:bold; background-color:inherit">this);
touchEvt->onTouchEnded=CC_CALLBACK_2(HelloWorld::onTouchEnded,108); list-style:decimal-leading-zero outside; color:inherit; line-height:18px; margin:0px!important; padding:0px 3px 0px 10px!important"> touchEvt->onTouchCancelled=CC_CALLBACK_2(HelloWorld::onTouchCancelled,248)">
Director::getInstance()->getEventDispatcher()->addEventListenerWithSceneGraphPriority(touchEvt,108); list-style:decimal-leading-zero outside; color:inherit; line-height:18px; margin:0px!important; padding:0px 3px 0px 10px!important"> boolHelloWorld::onTouchBegan(cocos2d::Touch*touch,cocos2d::Event*evt)
{
log("Touchbegan..");
returntrue;
}
voidHelloWorld::onTouchMoved(cocos2d::Touch*touch,cocos2d::Event*evt)
log("Touchmoved..");
voidHelloWorld::onTouchEnded(cocos2d::Touch*touch,248)"> log("Touchleave..");
Director::getInstance()->getEventDispatcher()->removeEventListenersForTarget( }
voidHelloWorld::onTouchCancelled(cocos2d::Touch*touch,108); list-style:decimal-leading-zero outside; color:inherit; line-height:18px; margin:0px!important; padding:0px 3px 0px 10px!important"> log("Somethingwashappend,toucheventiscut..");
}

四、动作回调

autocallBack=CallFunc::create(CC_CALLBACK_0(HelloWorld::actionCallBack,this));

this->runAction(callBack);
voidHelloWorld::actionCallBack()
log("Dosomethingwhenactiondidfinished..");
}

五、自定义事件回调

autocallBack=[](EventCustom*evt)

log("catchancustomevent!!");
};
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()->addEventListenerWithFixedPriority(customEvt,12);
//抛出自定义事件
Director::getInstance()->getEventDispatcher()->dispatchCustomEvent("ME_CUSTOM_EVENT_TEST");

（编辑：李大同）

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