标签：des style blog color os io ar div
// oneSprite void HelloWorld::touchableSpriteTestOne() { Vec2 origin = Director::getInstance()->getVisibleOrigin(); Size size = Director::getInstance()->getVisibleSize(); auto sprite1 = Sprite::create("Images/CyanSquare.png"); sprite1->setPosition(160, 240); addChild(sprite1,0,100); // Make sprite1 touchable auto listener1 = EventListenerTouchOneByOne::create(); listener1->setSwallowTouches(true); listener1->onTouchBegan = [=](Touch* touch, Event* event){ auto target = static_cast<Sprite*>(event->getCurrentTarget()); log("target.x.y: %f %f tag:%d isSprite1:%d width:%f,height:%f", target->getPosition().x, target->getPosition().y, target->getTag(), target == sprite1, target->getContentSize().width, target->getContentSize().height); Vec2 locationInNode = target->convertToNodeSpace(touch->getLocation()); log("locationInNode %f %f", locationInNode.x, locationInNode.y); Size s = target->getContentSize(); Rect rect = Rect(0, 0, s.width, s.height); if (rect.containsPoint(locationInNode)) { log("sprite began... x = %f, y = %f tag:%d", locationInNode.x, locationInNode.y, target->getTag()); target->setOpacity(180); return true; } return false; }; listener1->onTouchMoved = [](Touch* touch, Event* event){ log("%s", "onTouchMoved"); auto target = static_cast<Sprite*>(event->getCurrentTarget()); target->setPosition(target->getPosition() + touch->getDelta()); }; listener1->onTouchEnded = [=](Touch* touch, Event* event){ auto target = static_cast<Sprite*>(event->getCurrentTarget()); log("sprite onTouchesEnded.. "); target->setOpacity(255); }; //onTouchBegan 随便点个地方都触发，onTouchMoved onTouchEnded 是点到sprite1才触发， _eventDispatcher->addEventListenerWithSceneGraphPriority(listener1, sprite1); }
1、onTouchBegan无论点哪里都触发。只有在点中了sprite1，onTouchBegan return true的时候onTouchMoved ，onTouchEnded才会触发
2、Vec2 locationInNode = target->convertToNodeSpace(touch->getLocation()); 这个touch->getLocation是整个GL的坐标，整个屏幕相对于左下角的坐标
转换为target的本地坐标 矩形是原点为(0,0)，长宽，原点是左下角，锚点是中心，addchild的时候是孩子的锚点对准自己的原点，自己的原点是左下角。
3、点击屏幕的每个地方 target都是最上层的那个target，通过转换为target的矩形范围，来判断是点击了哪个sprite.
4、
// TouchableSpriteTest
void HelloWorld::touchableSpriteCont()
{
Vec2 origin = Director::getInstance()->getVisibleOrigin();
Size size = Director::getInstance()->getVisibleSize();
auto sprite2 = Sprite::create("Images/MagentaSquare.png");
sprite2->setPosition(origin + Vec2(size.width / 2, size.height / 2));
addChild(sprite2, 20, 200);
log("1sprite2.width,sprite2.height: %f %f", sprite2->getContentSize().width, sprite2->getContentSize().height);
//锚点确定精灵自己在父节点的加载位置,原点始终在左下角为0,0 addchild的时候是孩子的锚点对准 自己的原点。
//并不是你点精灵的区域才响应 是精灵所在的那一层范围都能响应
auto sprite3 = Sprite::create("Images/YellowSquare.png");
sprite3->setPosition(0, 0);
sprite2->addChild(sprite3, 1, 300);
log("layer.width,layer.height: %f %f",this->getContentSize().width,this->getContentSize().height);
log("2sprite2.width,height:%f %f", sprite2->getContentSize().width, sprite2->getContentSize().height);
// Make sprite1 touchable
auto listener1 = EventListenerTouchOneByOne::create();
listener1->setSwallowTouches(true);
listener1->onTouchBegan = [=](Touch* touch, Event* event){
auto target = static_cast<Sprite*>(event->getCurrentTarget());
log("target.x.y: %f %f tag:%d width:%f,height:%f", target->getPosition().x, target->getPosition().y,
target->getTag(), target->getContentSize().width, target->getContentSize().height);
Vec2 locationInNode = target->convertToNodeSpace(touch->getLocation());
Size s = target->getContentSize();
Rect rect = Rect(0, 0, s.width, s.height);
log("locationInNode.x= %f ,y= %f,contentW= %f,contentH= %f", locationInNode.x, locationInNode.y, s.width, s.height);
if (rect.containsPoint(locationInNode))
{
log("dist began... x = %f, y = %f tag:%d", locationInNode.x, locationInNode.y, target->getTag());
target->setOpacity(180);
return true;
}
return false;
};
listener1->onTouchMoved = [](Touch* touch, Event* event){
log("%s", "onTouchMoved");
auto target = static_cast<Sprite*>(event->getCurrentTarget());
target->setPosition(target->getPosition() + touch->getDelta());
};
listener1->onTouchEnded = [=](Touch* touch, Event* event){
auto target = static_cast<Sprite*>(event->getCurrentTarget());
log("sprite onTouchesEnded.. ");
target->setOpacity(255);
};
_eventDispatcher->addEventListenerWithSceneGraphPriority(listener1->clone(), sprite2);
}
结论：
1，a.addChild(b); a的宽高没变，还是自己的宽高。
//sprite包含情况 void HelloWorld::testSpriteAdd() { auto sprite1 = Sprite::create("Images/CyanSquare.png"); sprite1->setPosition(160, 240); log("sprite1 w,h %f %f",sprite1->getContentSize().width, sprite1->getContentSize().height); auto node = Node::create(); node->addChild(sprite1); addChild(node, 0, 100); log("node w,h %f %f", node->getContentSize().width, node->getContentSize().height);//0,0 }
2.node.addChild(sprite);node的宽和高也没变 感觉2dx的显示不是树形结构。
cocos2dx 3.2 事件机制,布布扣,bubuko.com
标签：des style blog color os io ar div
原文地址：http://www.cnblogs.com/as3lib/p/3904477.html
