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在cocos2dx的ontouchbegind()中,返回布尔是什么意思

cocos2d-x events c++

-2

armnotstrong · 技术社区 · 8 年前

onTouchBegan() 而不是 onTouchMoved() 和 onTouchEnded()

auto listener = EventListenerTouchOneByOne::create();

listener->onTouchBegan = [=](Touch *touch, Event *event) {
    CCLOG("on touch begain at (%f,%f)", touch->getLocation().x, touch->getLocation().y);
    return false; // this will make following two events couldn't be fired.
};
listener->onTouchMoved = [=](Touch *touch, Event *event) {
    CCLOG("on touch moved at (%f, %f)", touch->getLocation().x, touch->getLocation().y);
};

listener->onTouchEnded = [=](Touch *touch, Event * event) {
    CCLOG("on touch ended at (%f,%f)", touch->getLocation().x, touch->getLocation().y);
};

_eventDispatcher->addEventListenerWithFixedPriority(listener, 1);

发生这种情况的原因是 onTouchBegan false 将此更改为后 true , onTouchMoved 和 onTouchEnded

我四处搜索,可以找到任何关于这个返回标志打算做什么的解释吗?有人能解释一下吗?

1 回复 | 直到 8 年前

Tomas Dittmann 8 年前

文档没有说明这一点,但 programmers-guide 做:

// trigger when you push down
listener1->onTouchBegan = [](Touch* touch, Event* event)
{
    // your code
    return true; // if you are consuming it
};

[] 而不是 [=]